How to Choose a Scale for Model Making

Posted by AWS Team on Sep 5th 2026

Choosing a scale for model making starts with two questions:

What is the smallest quantity you need to weigh?

and:

What is the largest complete load you will place on the scale?

Those two measurements help determine the right combination of:

Capacity
Readability
Accuracy requirements
Minimum usable load
Repeatability
Platform size
Tare
Calibration

For many small model-making tasks involving pigments, paints, fillers and small additives:

100–500g × 0.01g

is a useful starting range.

For broader versatility:

500g × 0.01g

can be particularly practical.

For larger resin, silicone, plaster and casting batches:

1–5kg × 0.1g

may be a better choice.

The goal is not to buy the scale with the highest capacity or the most decimal places.

The goal is to choose the specification that matches your actual projects.

Quick Guide: Which Scale Should You Choose?

Model-Making Task	Suggested Capacity	Suggested Readability
Model paint mixing	100–500g	0.01g
Pigments and mica	100–500g	0.01g
Fine fillers	100–500g	0.01g
Small adhesives	100–500g	0.01g
Lightweight miniature parts	100–500g	0.01g
Small resin batches	200–500g	0.01–0.1g
Medium resin batches	500g–2kg	0.1g
Small silicone molds	500g–2kg	0.1g
Plaster and terrain material	1–5kg+	0.1g
Larger casting batches	2–5kg+	0.1g
Genuine milligram-level work	Low-capacity precision scale	0.001g when required

For many hobbyists who work with small materials:

500g × 0.01g

offers an excellent balance between capacity and fine readability.

Step 1: List Everything You Plan to Weigh

Before comparing scales, identify your materials.

Model makers commonly work with:

Resin
Hardener
Silicone
Pigments
Mica
Model paints
Fillers
Putty
Adhesives
Casting powders
Plaster
Terrain compounds
Lightweight components

The scale needed for 0.25g of pigment may be very different from the scale needed for 2kg of plaster.

This is why choosing a scale by hobby category alone is not enough.

Choose according to actual mass ranges.

Step 2: Find Your Smallest Normal Measurement

Suppose a model-making project uses:

Resin = 100g

Hardener = 50g

Filler = 4g

Pigment = 0.50g

A 1g scale may handle the resin quantity.

But it cannot display 0.50g with useful detail.

A scale with:

0.01g readability

is much more appropriate for the pigment.

Your smallest routinely measured material is therefore one of the most important specifications to identify.

Step 3: Understand Readability

Readability describes the smallest increment displayed on the scale.

AWS explains this relationship in What Does 500g × 0.01g Mean on a Digital Scale?.

1g Readability

A 1g scale displays:

10g

11g

12g

This may work for:

Large plaster batches
Heavy casting material
Large quantities of terrain compound

It is generally too coarse for precision pigments and small formulation ingredients.

Step 4: Decide Whether You Need 0.1g

A 0.1g scale displays:

10.0g

10.1g

10.2g

This is often useful for:

Resin
Silicone
Plaster
Larger filler quantities
Casting materials

Example:

Resin = 250.0g

Hardener = 125.0g

Filler = 20.0g

For quantities at this scale, 0.1g readability may provide sufficient measurement detail.

Step 5: Decide Whether You Need 0.01g

A 0.01g scale displays:

10.00g

10.01g

10.02g

This is useful when model-making materials become much smaller.

Examples:

Pigment = 0.45g

Mica = 0.75g

Filler = 1.25g

Paint component = 2.50g

For these kinds of quantities:

100–500g × 0.01g

can be a strong choice.

Step 6: Decide Whether You Really Need 0.001g

A 0.001g scale displays thousandths of a gram.

Because:

0.001g = 1mg

this is commonly called milligram readability.

Most normal model-building work does not require that level.

AWS compares these precision classes in 0.001g vs. 0.01g Scales: Which Precision Do You Need?.

A finer scale can also be more sensitive to:

Airflow
Vibration
Static
Temperature changes
Surface instability

Choose 0.001g only when the actual project requires it.

Step 7: Do Not Confuse Readability With Accuracy

This distinction matters.

If a scale shows:

2.35g

that tells you the display changes in hundredths of a gram.

It does not automatically guarantee that the actual mass is exactly 2.35g.

When comparing scales, also consider:

Accuracy specifications
Repeatability
Minimum usable load
Calibration
Environmental stability

NIST's Calibration of Mass Standards provides broader technical background on reference mass standards and calibration.

For hobby users, the practical rule is:

more decimal places do not automatically mean better measurement.

Step 8: Consider Minimum Usable Load

Suppose you buy a:

500g × 0.01g

scale.

The display can change by 0.01g.

That does not automatically mean:

0.01g

is an appropriate working quantity.

The minimum mass that can be used reliably for your purpose may be higher.

This becomes especially important for:

Tiny pigment quantities
Fine powders
Very small paint additions

Check available manufacturer specifications rather than assuming the smallest displayed increment equals the smallest useful measurement.

Step 9: Consider Repeatability

Model making frequently involves recreating successful mixtures.

Suppose you place the same stable object on the scale repeatedly.

A repeatable scale might show:

10.25g

10.24g

10.25g

A less consistent result might look like:

10.25g

10.43g

10.11g

10.37g

10.19g

AWS discusses environmental and mechanical causes of unstable readings in Why Does My Digital Scale Give Different Readings?.

Repeatability is particularly useful when developing custom colors or material recipes you want to reproduce later.

Step 10: Calculate Your Largest Complete Load

Your maximum capacity requirement should include:

container + every material resting on the scale

Suppose:

Mixing cup = 80g

Resin = 250g

Hardener = 125g

Pigment = 2g

Total:

457g

A 500g scale can support this nominal load.

But it gives you only 43g of capacity headroom.

A 1kg scale may be more convenient.

Step 11: Remember That the Container Counts

Suppose your scale has:

500g capacity

and your empty mixing container weighs:

150g

You do not have 500g remaining for materials.

Your approximate remaining nominal physical capacity is:

350g

before accounting for any other objects resting on the platform.

Step 12: Tare Does Not Restore Capacity

Place the 150g cup on the scale.

Press tare.

Display:

0.00g

The scale is still physically supporting 150g.

Tare changes what you see on the display.

It does not remove the container from the load cell.

This is one of the most important capacity concepts when weighing model-making materials.

Step 13: Leave Capacity Headroom

Do not choose a scale that will routinely operate at nearly maximum capacity.

Suppose your normal complete load is:

485g

and your scale has:

500g capacity.

You have only:

15g

of headroom.

A different cup or slightly larger batch could exceed capacity.

If your normal loads approach 500g, a 1kg or 2kg model may be more practical.

Step 14: Choose Between 100g, 200g and 500g

100g Capacity

Useful for:

Tiny pigment mixtures
Small model-paint recipes
Lightweight miniature parts

The limitation is container weight.

200g Capacity

Useful for:

Pigments
Fillers
Small resin samples
Small adhesive mixes
Lightweight trays

It provides more flexibility while remaining compact.

500g Capacity

Useful for:

Pigments
Paint
Fillers
Small resin batches
Putty
Adhesive
Small mixing cups
Lightweight components

For many model makers, 500g is the most versatile compact capacity.

Step 15: Know When You Need 1kg or More

Higher capacity becomes useful when working with:

Medium resin pours
Silicone molds
Plaster
Terrain material
Heavy casting compounds
Larger mixing cups

For these projects:

1–5kg × 0.1g

may be substantially more practical than a pocket scale.

Step 16: Consider 500g × 0.01g for General Precision Work

500g × 0.01g

scale offers an attractive middle ground.

It can provide enough capacity for many small containers while retaining useful readability for:

Pigments
Model paint
Fine filler
Mica
Small adhesive batches
Small resin tests

It is not ideal for every model-making application, but it covers a broad range of fine hobby work.

Step 17: Choose the Right Scale for Resin

Resin projects vary enormously in size.

For a tiny model or jewelry-sized cast:

200–500g

capacity may be sufficient.

For larger molds and castings:

1–5kg or more

may be necessary.

AWS discusses resin-specific requirements in Best Digital Scale for Resin.

For many resin workflows, a practical combination is:

Main resin scale

1–5kg × 0.1g

plus:

Fine pigment scale

100–500g × 0.01g

Step 18: Follow the Resin Manufacturer's Ratio

A digital scale only tells you mass.

It does not determine the correct resin-to-hardener ratio.

For example:

2:1 by volume

does not automatically mean:

2:1 by weight.

The components can have different densities.

TotalBoat's guide to mixing epoxy by weight illustrates the importance of using manufacturer-specific weight instructions.

Use a weight ratio only when the manufacturer provides or approves one.

Step 19: Understand Weight vs. Volume

Mass and volume are different measurements.

Two materials can occupy the same volume but weigh different amounts.

TotalBoat further explains this in its guide to measuring epoxy by weight versus volume.

A highly precise scale cannot correct an incorrect mixing ratio.

Step 20: Choose a Scale for Pigments

Pigments usually require much less capacity than resin.

For example:

Resin = 100g

Pigment = 0.75g

Metallic powder = 0.25g

For the pigment portion:

100–500g × 0.01g

can be especially useful.

AWS provides more pigment-specific guidance in Best Digital Scale for Epoxy Pigments.

Step 21: Choose a Scale for Model Paint

A precision scale can make custom model-paint formulas easier to reproduce.

For example:

Base paint = 5.00g

White = 1.25g

Black = 0.35g

Metallic pigment = 0.20g

Recording these quantities gives you a much clearer recipe for reproducing the same color.

For these small mixtures:

0.01g readability

is often useful.

Step 22: Choose a Scale for Fillers

Small filler quantities may benefit from:

0.01g readability

while larger additions may only require:

0.1g.

For example:

Fine pigment-style filler = 0.75g

Bulk filler = 25.0g

These two measurements do not necessarily require the same scale.

Step 23: Choose a Scale for Putty

Some multi-component modeling putties have specific mixing instructions.

If the manufacturer supports weight-based measurement, a small:

100–500g × 0.01g

scale may be useful.

Do not automatically assume every putty should be mixed by weight.

Step 24: Choose a Scale for Adhesive

Small adhesive mixes may involve only a few grams.

Example:

Component A = 5.00g

Component B = 2.50g

A 0.01g precision scale provides useful measurement detail.

Only use mass-based mixing when the adhesive manufacturer provides or supports a weight ratio.

Step 25: Choose a Scale for Silicone Mold Making

Silicone molds can range from tiny miniature molds to large terrain pieces.

For small batches:

500g × 0.01–0.1g

may be sufficient.

For larger molds:

1–5kg × 0.1g

may be far more useful.

Follow the exact silicone manufacturer's ratio.

Step 26: Choose a Scale for Plaster and Terrain

Plaster quickly becomes heavy.

Suppose:

Container = 300g

Plaster + water = 1,200g

Total:

1,500g

A 500g precision scale cannot handle this.

2kg or greater

scale is a better choice.

There is little advantage to sacrificing capacity for 0.01g readability when weighing kilogram-sized batches.

Step 27: Consider Platform Size

Platform size is often overlooked.

Your normal container should:

Sit securely
Remain centered
Avoid touching the countertop
Avoid leaning against surrounding tools
Leave the display visible

If your resin cup is much wider than the platform, a larger scale may be more convenient even if the capacity specification is technically sufficient.

Step 28: Make Sure the Scale Has Tare

Tare is one of the most useful scale functions for model making.

Example:

Empty cup = 45.00g

Place cup on scale.

Press tare.

Display:

0.00g

Add material:

20.25g

You can now see the material mass without manually subtracting the container.

Step 29: Understand Sequential Tare

You can also tare between additions.

Suppose your project uses:

Base = 25.00g

Filler = 3.50g

Pigment = 0.65g

You might:

Tare the empty container.
Add the base.
Record the mass.
Tare.
Add filler.
Record it.
Tare.
Add pigment.

Remember that all materials remain physically on the scale.

Step 30: Check Calibration Before Buying

A precision scale should have a clear model-specific calibration procedure.

Find out:

Can it be user calibrated?
Which calibration mass does it require?
Is the weight included?
Are instructions available?

AWS explains the general process in How to Calibrate a Digital Scale for Accurate Results.

Do not assume a 500g-capacity scale always uses a 500g calibration weight.

Step 31: Use an Appropriate Calibration Reference

Avoid using random objects such as:

Coins
Batteries
Model pieces
Paint jars
Hobby tools

as substitutes for a suitable calibration weight.

NIST's Calibration Procedures for Weights and Measures Laboratories provides additional background on controlled mass calibration procedures.

For ordinary hobby equipment, follow the scale manufacturer's calibration instructions.

Step 32: Use a Stable Work Surface

A precision scale should sit on a:

Hard
Flat
Rigid
Stable

surface.

Avoid:

Flexible cutting mats
Carpet
Fabric
Wobbly folding tables
Upholstered furniture

A stable scale begins with a stable surface.

Step 33: Keep the Scale Away From Workshop Vibration

Model-making rooms often contain:

Air compressors
Rotary tools
Sanders
Drills
3D printers
Mixers

These can introduce vibration.

For fine weighing, use a separate stable surface or turn nearby equipment off temporarily.

Step 34: Control Airflow

Air movement can affect fine-resolution readings and lightweight powders.

Avoid placing a precision scale directly beside:

Airbrush booths
Fans
HVAC vents
Air purifiers
Open windows

This becomes increasingly important with 0.01g and especially 0.001g scales.

Step 35: Consider Static

Model makers frequently work with:

Plastic cups
Fine mica
Pigments
Lightweight powder
Synthetic tools

These can generate static.

Static may cause powder to stick to the container rather than transfer completely.

That can complicate repeatable fine weighing.

Step 36: Consider Temperature

Precision scales can need time to stabilize after significant temperature changes.

Avoid moving the scale directly from:

cold garage → warm room

and immediately expecting the most stable measurements.

Follow the manufacturer's operating instructions.

Step 37: Choose a Clear Display

A good model-making scale should make decimals easy to distinguish.

There is a major difference between:

0.25g

and:

2.50g

Useful features include:

Backlighting
High contrast
Clear decimal placement
Good viewing angle

Make sure the normal mixing container does not hide the display.

Step 38: Consider Weighing Trays

Trays can be useful for:

Pigments
Fillers
Fine powders
Tiny components

Workflow:

Place tray on the scale.
Wait for stability.
Press tare.
Confirm zero.
Add material.
Record the mass.

The tray still contributes to total physical capacity.

Step 39: Protect the Scale From Model-Making Materials

Resin, paint and adhesive can damage a digital scale.

Avoid allowing materials to enter:

Buttons
Platform gaps
Display seams
Electronics
Battery compartment

Use disposable containers or trays whenever possible.

A stainless-steel weighing platform can make surface maintenance easier, but it does not make the entire instrument waterproof or solvent-resistant.

Step 40: Decide Whether You Need One Scale or Two

Ask whether your normal range is something like:

0.25g → 300g

or:

0.25g → 3kg.

In the first case, one 500g × 0.01g precision scale may cover much of the work.

In the second case, two scales are usually more practical.

Recommended Two-Scale Setup for Model Makers

Fine Scale

500g × 0.01g

for:

Pigments
Paint
Fillers
Small adhesives
Lightweight parts
Small formulation batches

Higher-Capacity Scale

1–5kg × 0.1g

for:

Resin
Silicone
Plaster
Terrain materials
Casting compounds
Heavy mixing containers

This configuration provides far more useful range than trying to make one instrument handle both extremes.

A Practical AWS Option for Fine Model-Making Work

The AWS SC501g Precision Digital Pocket Scale provides:

500g × 0.01g

and is a practical option for many smaller model-making materials.

Features include:

Stainless-steel weighing platform
Backlit LCD
Tare function
Multiple weighing units
Two expansion trays
Compact size
Battery operation

You can review the SC501g Precision Digital Pocket Scale for current specifications.

For pigments, fillers, model paint and other smaller materials, the combination of 500g capacity and 0.01g readability provides substantial flexibility.

When a 500g × 0.01g Scale Is Not the Right Choice

Consider a higher-capacity model if:

Your normal complete load exceeds 500g.
Your mixing container is heavy.
You regularly work with large resin batches.
You make large silicone molds.
You mix plaster or terrain material.

Consider a finer instrument only if your actual application requires measurement below the useful working range of a 0.01g scale.

Example 1: Small Model Paint Mix

Suppose you mix:

Gray = 5.00g

White = 1.20g

Blue = 0.35g

Metallic pigment = 0.15g

Total material:

6.70g

A 0.01g precision scale is well suited to recording this type of recipe.

Example 2: Small Resin Model

Suppose:

Mixing cup = 40g

Resin components = 100g

Pigment = 0.75g

Total physical load:

140.75g

A 500g scale provides plenty of capacity.

The 0.01g readability is particularly useful for the pigment.

Example 3: Larger Terrain Casting

Suppose:

Container = 300g

Casting compound = 1,500g

Total:

1,800g

A 500g scale is completely inappropriate.

2kg or greater

scale should be considered.

Example 4: Pigment Formula

Suppose your custom metallic color uses:

Black = 0.40g

Silver = 0.30g

Blue = 0.15g

Gold = 0.10g

A 0.01g scale allows you to document each addition much more precisely than a 0.1g scale.

Common Mistakes When Choosing a Scale for Model Making

Choosing the Scale With the Most Decimal Places

More digits are not automatically better.

Ignoring Your Smallest Measurement

Your tiniest normal ingredient helps determine readability.

Ignoring Your Largest Load

Container plus material determines required capacity.

Forgetting Container Weight

The cup counts toward maximum load.

Assuming Tare Restores Capacity

It does not.

Confusing Readability With Accuracy

They are different specifications.

Ignoring Minimum Usable Load

0.01g readability does not automatically make 0.01g an appropriate working quantity.

Ignoring Repeatability

Repeatability matters when recreating formulas.

Choosing Too Small a Platform

Your container must sit correctly.

Ignoring Calibration

The scale should have a suitable calibration procedure.

Using Random Objects for Calibration

Use an appropriate calibration reference.

Ignoring Airflow

Fans and airbrush booths may affect sensitive readings.

Ignoring Vibration

Hobby equipment can destabilize measurements.

Ignoring Static

Fine powders can cling to plastic surfaces.

Allowing Resin Onto the Scale

Protect the instrument from spills.

Assuming Resin Weight and Volume Ratios Match

They may not. Follow the manufacturer.

Model-Making Scale Selection Checklist

Before choosing your scale, ask:

What materials will I weigh?
What is my smallest normal measurement?
What is my largest individual material quantity?
What is my largest complete batch?
What does my normal mixing container weigh?
Do I need 1g readability?
Do I need 0.1g?
Do I need 0.01g?
Do I genuinely need 0.001g?
What accuracy specifications are available?
What repeatability information is provided?
What minimum usable load applies?
Does the capacity include enough headroom?
Does the scale provide tare?
Will sequential tare help?
Is the platform large enough?
Does my container obscure the display?
Is the display easy to read?
Can the scale be calibrated?
What calibration weight does it require?
Is that calibration weight included?
Are weighing trays included?
Can the scale be protected from resin and paint?
Is my workbench stable?
Is there nearby vibration?
Is there significant airflow?
Could static affect fine powders?
Is the temperature reasonably stable?
Would a second scale provide a better measurement range?
Does the scale match the materials I actually use?

Frequently Asked Questions

What scale should I use for model making?

For many small model-making materials:

100–500g × 0.01g

is a useful starting range.

For larger resin, silicone and casting batches:

1–5kg × 0.1g

may be more practical.

Is 500g × 0.01g good for model making?

Yes.

It offers enough capacity for many small containers while providing fine readability for pigments, paint, fillers and lightweight components.

Do I need a 0.01g scale for model making?

It is useful if you regularly measure materials below a few grams, particularly pigments and paint components.

For larger materials, 0.1g may be sufficient.

Do I need 0.001g?

Usually not.

Choose 0.001g only if your application genuinely requires milligram readability.

What scale is best for resin model making?

For small resin batches, 500g–2kg may be sufficient.

For larger casting work, 2–5kg or more may be necessary.

0.1g readability is often practical for main resin batches, while 0.01g can be useful for pigments and small additives.

What scale should I use for model paint?

For small custom model-paint mixtures:

100–500g × 0.01g

is a useful range.

What scale should I use for pigments?

For many pigments:

100–500g × 0.01g

offers useful fine readability.

What scale should I use for plaster?

Plaster and terrain mixes often require greater capacity.

1–5kg+

scale may be much more useful than a small precision pocket scale.

Does my mixing cup count toward capacity?

Yes.

The container and all materials resting on the platform contribute to maximum physical load.

Does pressing tare reset scale capacity?

No.

Tare resets the displayed reading, not the physical load.

Can I weigh epoxy resin?

Yes when the exact resin manufacturer provides or approves a mixing ratio by weight.

Do not assume the same numeric ratio applies to weight and volume.

Why does my scale fluctuate?

Possible causes include:

Drafts
Vibration
Static
Temperature changes
Weak batteries
Unstable surfaces
Platform interference
Calibration issues

Should I calibrate a model-making scale?

Follow the manufacturer's instructions for the exact model, particularly when you rely on repeatable weight-based formulas.

Is one scale enough for model making?

It may be if all your materials fall within a relatively narrow mass range.

If you work with tiny pigment quantities and kilogram-sized resin or plaster batches, two scales are often better.

What two scales should a model maker use?

A practical setup is:

500g × 0.01g

for fine materials,

plus:

1–5kg × 0.1g

for larger batches.

Final Verdict: How to Choose a Scale for Model Making

To choose the right scale for model making, start with:

your smallest normal measurement

and:

your largest complete physical load.

For pigments, model paint, fillers, lightweight components and other fine materials:

100–500g × 0.01g

is a strong starting range.

For general precision hobby work:

500g × 0.01g

offers an especially practical balance of capacity and readability.

For larger resin, silicone, plaster and casting batches:

1–5kg × 0.1g

may be more appropriate.

Most ordinary model-making projects do not need a 0.001g milligram scale unless the application genuinely requires measurements in that range.

Beyond capacity and readability, compare:

accuracy specifications, minimum usable load, repeatability, tare, calibration, platform size and environmental stability.

For model makers working across both fine and bulk materials, the strongest solution may be:

one 500g × 0.01g precision scale for pigments, paint and small materials

paired with:

one 1–5kg × 0.1g scale for resin, silicone, plaster and larger casting batches.

The right scale is not necessarily the one with the most decimal places.

It is the one whose measurement range best matches the projects on your workbench.