Calculate any percentage instantly — discounts, tax, tips, percentage change and more. All free, no signup needed.
Our free percentage calculator handles four of the most common percentage calculations in one place — finding a percentage of a number, calculating what percentage one number is of another, calculating percentage change between two values, and calculating discounted prices. All results update instantly as you type.
Whether you need to calculate a discount while shopping, figure out tax on an invoice, calculate your freelance income growth month over month, or work out a tip at a restaurant — this free percentage calculator has you covered.
Use the first calculator on this page. Enter 20 in the percentage field and your number in the second field. The result appears instantly. For example 20% of 500 = 100.
Use the "Percentage Change" calculator. Enter your starting value in the "From" field and your new value in the "To" field. A positive result means increase, a negative result means decrease.
Use the "Discount Calculator" at the bottom of the page. Enter the original price and the discount percentage. The calculator shows you the final price after the discount is applied.
Use the first calculator. Enter your tax rate percentage and your pre-tax amount. The result is the tax amount. Add this to your original amount to get the total with tax.