Percentage Calculators & Tools
Find the right calculator in one place. Calculate percentage increase, decrease, change, discounts, sales tax, tips, percentage error, and more—with clear formulas and step-by-step explanations.
All Calculators
Percentage Increase Calculator
Calculate how much a value has increased in percentage terms.
Percentage Decrease Calculator
Find the percentage decrease between an original and a new value.
Percentage Change Calculator
Measure the percentage change between two values, up or down.
Reverse Percentage Calculator
Work backwards to find the original value before a percentage change.
Percentage Difference Calculator
Compare two values and calculate their percentage difference.
What Percentage of X Is Y?
Find what percentage one number is of another number.
Percentage Error Calculator
Calculate the percentage error between measured and accepted values.
Percentage Point Calculator
Calculate the percentage-point difference between two percentages.
Discount Calculator
Calculate your discount amount, savings, and final sale price.
Sales Tax Calculator
Work out sales tax and the total price including tax.
Tip Percentage Calculator
Calculate a tip, total bill, and per-person share.