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Percentage calculator
The four most useful percentage calculations, on one page. Results update as you type.
What is X % of Y?
X is what % of Y?
Change between two values
Apply a discount / increase
Four essential calculations
X% of Y: what is 20% of $150? → $30. Proportion: 30 out of 150 is what percent? → 20%. Change: going from 120 to 90 is −25%. Discount/increase: $80 at −20% → $64.
Perfect for sales, tax, tips, a rent increase or revenue growth.
FAQ
How do I calculate a 30% discount?
Multiply the price by 0.70 (100% − 30%). Example: $50 × 0.70 = $35. Or use the 4th calculator with −30.
How do I find the pre-tax price from a total?
Divide by 1 + the tax rate. Example with 20% tax: $120 ÷ 1.20 = $100.
Percentage points vs percentage?
Going from 10% to 12% is +2 percentage points, but a +20% relative increase.