All percentage calculators

All-in-one calculator for percent of a number, percent change, reverse percentages, increases, decreases, and conversions.

Calculate percentage increase or decrease from an old value to a new value.

Find the original value before a percentage increase, decrease, or percent-of relationship.

Calculate sale price, savings, and original price from discount percentages.

Add or remove sales tax and estimate before-tax and after-tax prices.

Add or remove VAT and calculate net price, gross price, and VAT amount.

Calculate markup percentage, selling price, cost, and gross profit.

Calculate profit margin, markup, revenue, cost, and profit.

Calculate tips, totals, and split bills quickly.

Convert test scores into percentages and letter-grade style ranges.

Calculate percent error between experimental and accepted values.

Convert basis points to percentages and decimal rates.