Math calculators

Calculate the percentage increase or decrease between two nonnegative values, with the numerical difference shown separately.

Calculate a sale price, discount savings, and the final price after an entered sales-tax rate.

Add sales tax to a price or calculate the tax portion already included in a total using a rate you enter.

Calculate a tip on the pre-tax bill, add sales tax, and split the final total fairly with cent-accurate shares.

Find a percentage of any number quickly and see the calculation behind the answer.