Automatic Feeder Portion Size Guide: Grams & Cups (2026)

Convert automatic feeder portions to grams with a 10-dispense calibration, model-specific examples, and a simple calculator for your feeder and kibble.

Updated: 8 min read

Quick Answer

One automatic-feeder 'portion' is not a universal number of grams. Dispense 10 portions of your usual kibble, weigh the total, then divide by 10. To set each meal, divide your label- or veterinarian-based daily gram target by meals per day, then divide again by the measured grams per portion.

Official Portion Examples for Three Exact Models

These values are model-specific starting points, not universal conversions. Manufacturers still recommend accounting for the food you load.

Feeder model Manufacturer value Important qualifier Official source
PETLIBRO Granary PLAF005 / 006 / 103 / 203 About 20ml, or 1/12 cup Actual weight varies with kibble size, shape, freshness, and thickness. PETLIBRO guide
WOPET F01 Plus About 5g with the small wheel; 10g with the large wheel The manual notes a slight difference with different food. WOPET F01 Plus support guide
PETKIT Fresh Element SOLO P570 About 10g per fixed-volume serving Pellet size, density, and a low hopper can change actual output. PETKIT manual

Feeder Portion Calculator

Enter the daily target from your food label or veterinarian and the result of your own calibration test. The calculation stays in your browser.

This calculator converts your measurements into the nearest whole-portion setting. It does not set a safe calorie target or replace veterinary advice.

What Does One Automatic Feeder Portion Mean?

A portion is one turn or step of a feeder's dispensing mechanism, not a standard unit of weight. The same rotor volume can hold different weights of round, flat, fresh, or broken kibble. Even official specifications for some feeders describe a portion by volume, while others give an approximate weight. Use your exact model's manual as a starting point, then measure the feeder with the food you actually use.

How Do You Measure Grams per Portion?

1. Fill the hopper with the kibble you normally use. 2. Put an empty bowl on a kitchen scale and tare it to zero. 3. Manually dispense 10 portions into the bowl. 4. Divide the total weight by 10. That is your working grams-per-portion number. A 10-portion test smooths out small differences between individual dispenses. Repeat once if the result looks unusual, and test again after changing kibble or the dispensing wheel.

How Do You Calculate Portions per Meal?

Use two short equations: target grams per meal = target daily grams / meals per day, then portions per meal = target grams per meal / measured grams per portion. Example: a daily target of 54g across three meals is 18g per meal. If your 10-dispense test measures 6.2g per portion, 18 / 6.2 = 2.9, so the nearest available setting is three portions. That schedule would dispense about 55.8g per day. This is arithmetic, not a feeding recommendation; the calculator below lets you use your own numbers.

How Do You Convert Feeder Portions to Cups?

Grams are the more repeatable unit, but you can estimate cups if a recipe or routine uses volume. First weigh one level cup of the same kibble. Then calculate cups per portion = measured grams per portion / measured grams per cup. If your model's manufacturer publishes a portion volume, use it only for that exact model. Do not copy a cup conversion from another feeder or another kibble.

Where Should Your Daily Gram Target Come From?

Start with the feeding guide for your exact food, because calorie density varies by recipe. Then adjust with your veterinarian based on species, ideal weight, age, activity, neuter status, treats, health conditions, and body condition score. The American Animal Hospital Association describes the package guide as a starting point rather than a universal prescription, and its nutrition guidance recommends weighing food in grams when precision matters.

When Should You Recalibrate?

Run the 10-dispense test again when you change kibble brand, recipe, shape, or bag; install a different rotor or dispensing wheel; clean and reassemble the mechanism; or notice an unexplained change in the bowl or your pet's weight trend. The PETKIT Fresh Element SOLO manual also notes that a low food level can reduce the amount dispensed, so checking once with a partly depleted hopper can reveal whether refill level matters on your unit.

Common Portion-Setting Mistakes

Using another model's number: even feeders from the same brand can use different mechanisms. Testing one dispense: a 10-dispense sample is more useful than a single turn. Changing kibble without recalibrating: shape and density change how the rotor fills. Ignoring treats or hand-fed food: the feeder controls only part of total intake. Rounding without checking the daily result: multiply the chosen whole-portion setting back out so you can see the projected daily difference. Using the calculator as medical advice: it converts units; it does not decide how much your pet should eat.

Sources and Safety Notes

Model examples on this page come from the manufacturers' own materials: PETLIBRO's portion guide, the WOPET F01 Plus support guide, and the PETKIT Fresh Element SOLO P570 manual. Approximate manufacturer values are not a substitute for weighing your own output. Ask your veterinarian before changing intake for weight loss, growth, pregnancy, illness, or a therapeutic diet.

Frequently Asked Questions

How many grams is one automatic feeder portion?

There is no universal grams-per-portion value. It depends on the feeder mechanism and the kibble's size, shape, and density. Dispense 10 portions, weigh the total, and divide by 10.

How much is one PETLIBRO Granary portion?

PETLIBRO lists one portion for Granary models PLAF005, PLAF006, PLAF103, and PLAF203 as about 20ml, or about 1/12 cup. The company also says actual weight varies with the food, so weigh your own 10-portion sample.

How much is one WOPET F01 Plus portion?

The WOPET F01 Plus manual lists approximately 5g with the small dispensing wheel and 10g with the large wheel. It notes that different food can produce a slight difference, so treat those as starting estimates.

Can I convert feeder portions to cups?

Yes, but use your own kibble. Weigh one level cup, then divide your measured grams per portion by the grams in that cup. Grams are usually more repeatable for daily portioning.

How often should I recalibrate my feeder?

Recalibrate whenever you change kibble, change or reinstall the dispensing wheel, clean the dispensing mechanism, or notice a change in output. It is also useful to compare a full hopper with a partly depleted one.

What if my target meal is smaller than one portion?

Do not assume one portion is close enough. If the target is below half a measured portion, the feeder cannot match it accurately at that meal frequency. Ask your veterinarian whether to use fewer scheduled meals, choose a feeder with finer control, or handle part of the food another way.

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Written by Chengxian Yang. Data sourced from verified owner reviews, manufacturer specifications, and marketplace data as of July 2026. Individual experiences may vary.