The Only Percentage Calculator You Need — 4 Calculations in One Tool

I use percentages constantly and always forget the formula. So I built one tool that handles all four common percentage calculations.

1. What is X% of Y?

Example: What is 25% of 200? → 50

2. X is what % of Y?

Example: 50 is what % of 200? → 25%

3. Percentage Change

Example: From 100 to 150 → +50%

4. Increase/Decrease by %

Example: 80 + 20% = 96 | 80 - 20% = 64

Percentage Calculator

Simple, instant, no signup.

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• Tax Calculator
• Compound Interest
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Full toolkit: devtools-site-delta.vercel.app