✦ Split a bill or expenseStep 3 of 3
e.g. What is 15% of 200 = 30
Percentage (%)
/
Number
Pairs well with
About Percentage Calculator
Calculate percentages, increases, decreases, and percentage changes. Five modes: X% of Y, X is what % of Y, % change from X to Y, increase by, decrease by.
Percent maths trips up everyone occasionally — especially the difference between 'increase by 20%' (×1.2) and '20% off' (×0.8). The five modes cover every variation explicitly so you don't have to remember which formula to use.
The Quick Reference grid (when computing X% of Y) shows you the value at 5%, 10%, 15%, ..., 100% — useful for tipping, tax estimation, and discount comparisons.
Everything happens on your device. Close the tab and it's gone.