Interest & APR Calculators

Calculate I = Prt and A = P(1 + rt). Instant result with amortization table, formula and chart. Free financial calculator.

Calculate compound interest with any frequency. Instant result with amortization table, formula and chart. Free financial calculator.

Annual Percentage Rate calculation. Instant result with amortization table, formula and chart. Free financial calculator.

Calculate the Effective Annual Rate (EAR) from nominal rate and compounding frequency. Enter your values — see EAR and the compounding effect. Free.

Convert nominal to effective rate. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Calculate nominal interest rate. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Convert annual rate to periodic rate. Instant result with breakdown, formula and payment schedule. Free financial calculator.

Calculate interest for daily compounding periods. Enter principal, annual rate, and days — see daily interest and total accrued. Free.

Calculate interest for monthly compounding periods. Enter principal, annual rate, and months — see monthly interest and total. Free.

Convert APR to APY for accurate return comparison. Enter APR and compounding frequency — see APY with compounding effect shown. Free.

Calculate compound interest on a daily basis. Enter principal, annual rate, and period — see daily compounding growth and total. Free.

Find how many years to triple your money. Enter your interest rate — see years to triple using the Rule of 114 (114/r). Free.

Calculate the real (inflation-adjusted) interest rate. Enter nominal rate and inflation — see real rate using the Fisher equation. Free.

Calculate the Fisher effect relationship. Enter nominal rate and inflation — see real interest rate with Fisher equation. Free.

Calculate real investment returns after inflation. Enter nominal return and inflation rate — see real return and purchasing power. Free.