Compound Interest Calculator

Calculate compound interest and the total.

PrincipalAnnual rate (%)YearsCompounding frequency

Result

Formula

Total = principal × (1 + annual rate ÷ (100 × n))^(n × years), where n is the number of compounding periods a year: 1, 2, 4, or 12. Interest = total − principal.

Calculation

Data & privacy

Client-side computation

Your numbers are calculated in this browser.

Example

Example: 1,000 at 10% a year for 2 years compounded annually is a total of 1,210 and interest of 210. A principal of 0 stays 0, and a rate or period of 0 returns the principal.

Use a decimal point (.) and up to six decimal places; do not enter commas, currency symbols, or exponents. Amounts use the same unit.

Results are rounded to two decimal places. Nonzero values that round to zero are shown as a range and cannot be copied as a number.

Compounding uses whole years and the chosen frequency, with no intermediate rounding. Deposits, withdrawals, and daily or continuous compounding are not included.

Limits

The principal is 0 to 1,000,000,000,000, the annual rate is 0% to 100%, and the years are a whole number from 0 to 100. A total above 1,000,000,000,000 is rejected. Deposits, withdrawals, daily or continuous compounding, actual products, and taxes are not included.

Inputs

Result

Balance by year

Σ Formula

Calculation

Formula