Instructions
Compound interest calculator
How to use
Enter principal, nominal annual rate, duration and end-of-month deposit.
Enter principal, nominal annual rate, duration and end-of-month deposit.
Supported input
Assumes monthly compounding, fixed rates and end-of-month deposits; excludes taxes and fees.
Input example
KRW 1,000,000; 12%; 1 year
Result example
Monthly-compounded estimate
Troubleshooting
Check required inputs, numeric ranges and the selected conversion direction. Enter principal, nominal annual rate, duration and end-of-month deposit.
Limitations
Assumes monthly compounding, fixed rates and end-of-month deposits; excludes taxes and fees.
How it works
B = P(1+r)^n + D((1+r)^n-1)/r, where r is the nominal annual percentage divided by 1200, n is years × 12, and D is an end-of-month deposit. At zero interest: B = P + Dn. Taxes and fees are excluded.
Units & precision
Assumes monthly compounding, fixed rates and end-of-month deposits; excludes taxes and fees.