Weight Gain Calculator
Calculate total weight change and average daily change from two weights and elapsed days.
A QUICK WALKTHROUGH
How to use this tool
- Enter the two values with the displayed units.
- Calculate the result.
- Copy the report or download it as TXT.
Formula and units
Total change (kg) = ending weight − starting weight. Daily change (kg/day) = total change ÷ elapsed days. Weights must be at least 0 and days greater than 0.
Scope
Negative results mean weight decreased. This is arithmetic from your measurements, not a health assessment or feeding recommendation.
Local processing
Your entries stay in your browser. Copy and TXT export include the inputs, formula and scope.
GOOD TO KNOW
Common questions
How should I use the result?
Use it as an arithmetic estimate based on your supplied inputs.