If your pocket scale shows the wrong unit, check the small symbol beside the number before changing any settings. An accidental button press or a startup default can make a correct measurement look unfamiliar.
Grams, grains, ounces, troy ounces and carats produce different numbers for the same item. Selecting the right unit is usually an operating task—not a calibration problem.
Find the unit-selection instructions for your exact model, choose the required unit and confirm the symbol before recording a measurement.
Quick Wrong-Unit Troubleshooting Checklist
| Check | What to do | What it helps identify |
|---|---|---|
| Unit symbol | Read the abbreviation beside the number | What the scale is displaying |
| Button function | Check the documented UNIT or MODE control | Correct selection procedure |
| Supported units | Review the model’s specifications | Whether the desired unit is available |
| Operating mode | Confirm normal weighing mode | Counting or another function |
| Startup behavior | Restart and observe the selected unit | Default or remembered settings |
| Button response | Check whether the control works normally | A possible control problem |
| Verification | Check a suitable reference in the correct unit | Whether measurement performance needs attention |
The AWS product FAQ provides further guidance on operating modes and controls.
1. Identify the Unit Currently Selected
Look closely at the display. Do not interpret the number without its unit.
| Symbol | Meaning | Important distinction |
|---|---|---|
| g | Grams | Different from grains |
| gn | Grains | Not grams |
| oz | Avoirdupois ounces | Different from troy ounces |
| ozt | Troy ounces | Commonly used for precious metals |
| ct | Metric carats | Measures gemstone mass |
| dwt | Pennyweights | Used in some jewelry applications |
| PCS | Piece count, where supported | A count rather than a weight unit |
Not every pocket scale supports every option. Abbreviations and display layouts can also vary.
Check g vs. gn Carefully
g normally means grams. gn commonly means grains. Confusing them can make the displayed number appear substantially different from what you expect.
Check oz vs. ozt
An avoirdupois ounce and a troy ounce are different mass units. Confirm which one your task requires, especially when working with precious metals.
Check Carats vs. Gold Purity
A metric carat measures mass. The Gemological Institute of America explains that one carat equals 0.2 gram. It is different from karat, which describes gold purity. www.gia.edu
2. Find the Correct Unit-Control Procedure
Pocket scales often use a MODE or UNIT button, but there is no universal sequence.
To select a unit:
- Identify the model number.
- Find its operating instructions.
- Complete normal startup.
- Use the documented unit-selection control.
- Stop when the required symbol appears.
- Confirm normal weighing mode.
Find your model in the AWS product manuals.
Do not assume that holding a button has the same effect as pressing it briefly. A long press may activate calibration or another function.
3. Confirm That the Required Unit Is Available
If the desired unit never appears, check the model’s supported-unit list.
Similar-looking pocket scales can offer different selections. A unit available on one model may be absent from another.
Repeated button presses, resets or calibration will not add an unsupported unit.
Changing Units Does Not Increase Sensitivity
Displaying a measurement in a smaller unit does not create more measurement detail than the scale can provide.
Check the model’s readability, minimum-load guidance and performance specifications separately. NIST’s weighing and scales FAQs explains scale divisions and related concepts. www.nist.gov
4. Exit Counting or Other Modes
A display showing PCS may indicate piece-counting mode on models that support it. The number may represent a calculated count rather than live weight.
Use the manual’s procedure to return to ordinary weighing.
Other functions, such as hold or percentage modes where fitted, can also change the meaning of the displayed result. Do not assume every number on the screen is a weight.
If you accidentally enter calibration mode, follow the instructions for exiting without making an adjustment.
The AWS scale FAQs provides additional operating guidance.
5. Check What Happens After Restarting
Some pocket scales remember the last selected unit. Others return to a default.
Try a simple observation:
- Select the intended unit.
- Switch the scale off normally.
- Restart according to the manual.
- Check the unit symbol before adding weight.
If it returns to a default, confirm whether that is expected. Also check whether removing batteries affects stored settings.
Do not assume the scale has a fault simply because it starts in a different unit from the one you prefer.
6. Investigate a Unit Button That Does Not Respond
If the documented control does not change units, check:
- Whether startup has finished
- Whether normal weighing mode is active
- Whether the model has a documented control lock
- Whether the procedure requires an empty platform
- Whether the button is obstructed or damaged
- Whether power is intermittent
Turn the scale off before cleaning accessible surfaces. Do not pry out a button or spray liquid into the housing.
Follow the AWS maintenance guide.
Check Power When Other Symptoms Appear
Flickering, resets and low-battery warnings justify checking the batteries or charging setup.
Use the specified batteries and replace the complete set where applicable. Energizer’s battery-care guidance advises against mixing old and new batteries or different types. energizer.com
7. Verify the Result in the Correct Unit
After selecting the intended unit:
- Establish a stable empty-platform zero.
- Check tare.
- Place an appropriate reference weight gently in the center.
- Wait for the result to settle.
- Compare it with the reference and model specifications.
A familiar-looking number alone does not prove the unit or measurement is correct.
NIST’s guide to uncertainty for balances and scales discusses reference quality and other influences on measurement results. www.nist.gov
Use a Suitable Reference
The U.S. Mint publishes nominal coin specifications, but an individual coin is not a substitute for the calibration weight required by the scale manufacturer. www.usmint.gov
8. Keep Calibration Separate From Unit Selection
Calibration does not choose grams, ounces or another display unit.
If selecting the correct unit resolves the unexpected number, that issue alone does not indicate a need for calibration.
If a suitable reference still produces a stable result outside specifications, follow the model-specific calibration procedure.
Read the AWS guide on how to calibrate a digital scale.
Never adjust the scale to make a reading in one unit match an expected number in another unit.
When to Contact Support
Seek help if:
- A supported unit cannot be selected.
- The unit changes without an explained action.
- The control is stuck or damaged.
- Missing display segments make the unit unreadable.
- Startup behavior differs from the manual.
- Results remain outside specifications in the correct unit.
Provide the model number, current unit, desired unit and steps already tried. Contact American Weigh Scales support for assistance.
For commercial transactions, verify that the device, unit and configuration are suitable for the application. NIST Handbook 44 contains technical requirements for applicable commercial weighing devices; state and local requirements also matter. www.nist.gov
Frequently Asked Questions
How do I change my pocket scale from ounces to grams?
Use the documented UNIT or MODE procedure for your model. Confirm g appears before recording the result.
Why does my pocket scale start in the wrong unit?
It may return to a default rather than remembering your last selection. Check the manual.
What does gn mean?
It commonly means grains. Grams are normally shown as g.
What does PCS mean?
On models with piece counting, it indicates a count rather than a weight.
Will resetting or calibrating fix the unit?
Use the unit-selection control first. Calibration is a separate measurement procedure, and a reset may simply restore the default unit.