Percentage Calculator
Solve the three core percentage problems: what is X% of Y, X is what % of Y, and percentage increase/decrease.
About this calculator
The Percentage Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to solve the three core percentage problems: what is x% of y, x is what % of y, and percentage increase/decrease. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
value × percent / 100
What you'll need
- Mode
- X (e.g. 20)
- Y (e.g. 150)
What you'll get
- Result
Formula
value × percent / 100
Result
Frequently Asked Questions
How do I reverse a percentage? +
If A is 80% of B, then B = A / 0.80. Use mode 'X is what % of Y' to verify.
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