Three common percentage calculations in one free tool — instant results, no signup.
This free percentage calculator handles the three most common percentage questions people search for: finding what a percentage of a number is (e.g. what is 20% of 150), finding what percent one number is of another (e.g. 30 is what % of 150), and finding a percentage increase or decrease between two values.
Whether you're calculating a discount, a tip, a grade, a tax rate, or a business growth rate, this tool gives an instant, accurate answer with no signup and no ads interrupting your calculation.
Divide the smaller number by the total, then multiply by 100. For example, 30 out of 150 is (30/150)×100 = 20%. Use the second tab above to do this instantly.
Subtract the original value from the new value, divide by the original value, then multiply by 100. A positive result means an increase; a negative result means a decrease.
Yes, all three calculators accept decimal numbers for precise results.