Weigh 10 identical dispenses from your own feeder and food. The calculator shows the average, lightest and heaviest dispense, range and coefficient of variation without inventing a universal pass/fail score.
Original MeowBay measurement protocol · Updated October 3, 2026
10-dispense accuracy calculator
Tare the empty bowl before every reading. Enter grams only; do not enter the bowl weight.
The coefficient of variation is standard deviation divided by the mean. A lower value means the 10 readings were closer together. MeowBay does not assign a universal “safe” threshold because feeding plans, foods and manufacturer tolerances differ.
How to run a repeatable feeder test
- Use the real setup. Install the bowl, rotor, splitter and hopper insert you plan to use.
- Use one food lot. Mix the bag gently so the sample includes ordinary pieces and crumbs.
- Set a normal fill level. A nearly empty hopper may behave differently from a full one.
- Tare every reading. Weigh each release separately on the same kitchen scale.
- Record failures. A zero, partial release, double dispense or jam is operational evidence; do not delete it to improve the average.
- Repeat after changes. Test again after changing food, cleaning the rotor or adding a splitter.
How to interpret the results
| Finding | What it can mean | Next check |
|---|---|---|
| Average differs from the advertised grams | The manufacturer may be describing a nominal weight for a reference kibble density. | Use your measured average, then compare with the feeding plan. |
| Wide lightest-to-heaviest range | Irregular pieces, bridging, crumbs, hopper pressure or a splitter may be changing each release. | Inspect the food path and repeat after cleaning. |
| One zero or partial dispense | A jam, schedule issue or mechanical obstruction may be present. | Follow the exact manual and the troubleshooting guide. |
| Consistent but too-large minimum | The feeder’s smallest chamber may exceed the meal you need. | Use more meals only if appropriate for the cat’s plan, or choose a feeder with a smaller documented minimum. |
From test result to daily schedule
The calculator measures device output; it does not decide how many calories a cat needs. Once you have the mean grams per dispense, enter that measured figure in the Automatic Feeder Portion Calculator. Use the food label’s calories per gram and the feeding amount agreed with your veterinarian when individual medical or weight needs matter.
For multi-cat homes, one bowl cannot prove which cat ate which amount. Separate feeding stations or access-controlled feeders may be necessary when diets differ or one cat steals food.
Automatic feeder accuracy questions
Are automatic cat feeder portions accurate?
They can be repeatable with a compatible food, but many models meter a volume rather than weigh every release. Accuracy with your food should be measured rather than inferred from the advertised nominal grams.
Why does my feeder dispense different amounts?
Food density, piece size, shape, crumbs, hopper pressure, residue and accessories can change how a volumetric chamber fills and empties.
How many dispenses should I test?
Ten identical dispenses provide a useful first comparison and expose obvious misses or double releases. Repeat the test on different days and after any food or hardware change.
Should I remove a jammed or zero dispense from the calculation?
No. Record it as a failure and investigate the cause. Removing failures can make the average look stable while hiding the reliability problem that matters most.
Method and verification
This tool uses arithmetic mean, population standard deviation and coefficient of variation. It makes no medical recommendation and applies no invented universal accuracy threshold. Manufacturer portion references should be checked on the exact product page or manual.
Continue the reliability check
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