MATCH THE QUESTION
Choose the percentage calculation you need.
Use Percentage for part of a number, Change for movement between two values, Discount for a sale price, Tip for a bill, Margin for cost versus revenue, or Reverse percentage to recover an earlier value.
14±
Percent error calculatorCompare an observed measurement with a chosen reference. Read the absolute error, relative error and percentage error.
→15ΣWeighted average calculatorCombine values using non-negative weights. Weights are normalized automatically; they do not need to add up to 100.
→16↗CAGR calculatorFind annualized growth or solve for the starting value, final value or duration. Positive values only; no deposits or withdrawals.
→17AFinal exam grade calculatorFind the exam score needed to reach your course goal on a 0–100 scale.
→01%Percentage calculatorCalculate any percentage of a number instantly. See the answer, formula, and calculation with no signup.
→02↗Percentage changeFind the percentage increase or decrease between two numbers with the formula shown clearly.
→03↔Percentage differenceCompare two values without treating either one as the original value. See the absolute difference and percentage difference.
→04−Discount calculatorCalculate a sale price and savings from the original price and discount percentage.
→05−−Successive discountsApply two discounts in sequence and see the final price, total savings, and effective combined discount.
→06TVAT / sales taxAdd or remove VAT and sales tax, or find the rate from net and gross amounts.
→07+Tip calculatorCalculate a tip, total bill, and amount per person. Split a restaurant bill instantly.
→08MProfit marginCalculate profit, margin, and markup from cost and revenue, or find the selling price for a target margin.
→09↶Reverse percentageFind the original number before a percentage increase or decrease using reverse percentage calculation.
→=CHOOSE BY INTENT
Similar percentages can answer different questions.
01
Part of a number
Use the basic percentage calculator.
02
Movement over time
Use percentage change and keep the original value as the denominator.
03
Business pricing
Use margin for profit as a share of revenue, not markup on cost.