Percentage Calculator
Solve common percentage problems, calculate percentage change, and discounts live.
1. Percentage of a Value
What is
% of
=
30
2. Proportion Percentage
is what % of
=
25%
3. Percentage Increase / Decrease
From
to
=
+50% (Increase)
4. Add or Subtract Percentage
%
=
110
Results update live as you type. Rounding handles floating-point precision cleanly up to 4 decimal places where needed.
Your files never leave this device — everything happens in your browser.