Our free Percentage Calculator lets you solve any percentage problem instantly — from what is X% of Y, to X is what percent of Y, to percentage increase/decrease. Whether you're calculating discounts, tax amounts, exam scores, or profit margins, this tool handles all common percentage calculations.
Select from modes: '% Of' (what is X% of Y), 'X is What % of Y', or '% Change'.
Fill in the required input fields based on your selected mode. All inputs accept decimals.
Hit Calculate to instantly compute the result displayed in the result panel.
See the percentage or value clearly. The tool shows intermediate steps where helpful.
Use the Reset button to clear inputs and try a different calculation type.
Result = (X / 100) × Y — e.g., 15% of $200 = $30
% = (X / Y) × 100 — e.g., 30 is 15% of 200
% Change = ((New - Old) / Old) × 100
Share = (Part / Total) × 100 — e.g., 25 of 80 = 31.25%
Calculate sale price after a % discount — e.g., 30% off $120 = $84.
Add GST, VAT, or sales tax to any bill amount to find the tax-inclusive price.
Convert raw marks to percentage: 72 out of 80 = 90%.
Find gross margin: profit ÷ revenue × 100 to benchmark profitability.
Calculate your ROI as a percentage of the original investment cost.
Compute what % of a home's price you're putting down: 60,000 / 300,000 = 20%.
A percentage expresses a number as a fraction of 100. The symbol % means "per hundred" — so 45% = 45/100 = 0.45.
Multiply the number by the percentage divided by 100. Example: 20% of 500 = (20/100) × 500 = 100.
Divide the part by the whole and multiply by 100. Example: 75 out of 300 = (75/300) × 100 = 25%.
Percentage points are the arithmetic difference between two percentages. Going from 10% to 15% is a 5 percentage point increase but a 50% relative increase.
Yes! If you score 55 out of 50 in a bonus exam, that's 110%. Percentages above 100% mean the value exceeds the base reference.
Sale Price = Original Price × (1 - Discount%/100). Example: $200 with 25% off = $200 × 0.75 = $150.