Calculator
Weight change percentage
Percentage change is how weight is usually discussed in clinic, because it compares across bodies in a way that absolute numbers do not.
How it is worked out
The formula
change (%) = (current − start) ÷ start × 100. From 93.4 kg to 86.7 kg is −7.2%.
Units cancel
Pounds or kilograms both work, as long as both numbers use the same unit. The percentage is identical either way.
Why clinics use it
It compares like with like. Five kilograms means something different at 60 kg than at 120 kg; a percentage does not have that problem.
Common questions
Which starting weight should I use?
Whichever one the conversation is about — the first weight recorded, or the weight at the start of a medication. Cafeity keeps the date alongside the figure so the comparison is unambiguous.
Does Cafeity predict future weight?
No. It shows a smoothed trend of what you recorded, labelled as based on recent rate and explicitly not a prediction.
This is general wellness information
Cafeity does not diagnose, treat or prevent any condition, and never recommends, calculates or adjusts a medication dose. Anything on this page is arithmetic you can check, not advice. Questions about your treatment belong with a licensed healthcare professional.
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- BMI calculator — Body mass index from height and weight, plus what it does and does not measure.