Percentage Calculator
Percentages measure a part of a whole. This calculator handles the three everyday cases: a percent of a number, a number as a percent of another, and percent change. Results are shown together so you can check school homework, discounts, and stats in one place.
X% of Y50treats X as a percent
X is what % of Y12.5%
Percent change from Y to X-87.5%
Formula
part = whole × percent ÷ 100. percent = part ÷ whole × 100. change = (new − old) ÷ old × 100.
How to use this calculator
- Enter X and Y.
- Read all three interpretations.
- Use percent change when comparing an old and new value.
Examples
25% of 200
0.25 × 200 = 50. 25 is 12.5% of 200.
FAQ
Why are there three answers?+
People type the same two numbers meaning different things. Showing all three avoids the wrong interpretation.
Related tools
CalculatorTip CalculatorCalculate tip and per-person share from a bill, tip percent, and party size.CalculatorDiscount CalculatorFind sale price and amount saved from an original price and discount percent.CalculatorSales Tax CalculatorAdd sales tax to a net price or reverse a tax-inclusive total.CalculatorVAT CalculatorAdd or remove VAT at a chosen rate such as 5%, 10%, or 20%.CalculatorLoan EMI CalculatorEstimate equal monthly installments from principal, annual interest rate, and term in months.CalculatorMortgage CalculatorEstimate a fixed-rate monthly mortgage payment from home price, down payment, rate, and years.CalculatorCompound Interest CalculatorGrow a principal with compound interest by annual rate, years, and compounding frequency.CalculatorSimple Interest CalculatorCalculate simple interest I = P × r × t and the total amount.