Annuity Calculator
Compute present value (PV) or future value (FV) of an annuity using payment amount, annual interest rate, and number of periods.
Annuity Calculator tool
Example: monthly contribution/payment amount.
Used to convert annual rate into a periodic rate.
Example: 60 monthly payments = 5 years.
Informational only. Assumes equal payments and a constant interest rate.
This annuity calculator computes present value (PV) or future value (FV) for a stream of equal payments (PMT) made at a fixed interval. It’s commonly used for retirement contributions, savings plans, structured payouts, and investment growth estimates.
The calculator converts your annual interest rate into a periodic rate using payments per year, then applies the standard annuity formulas. Choose annuity due if payments happen at the beginning of each period.
Ordinary annuity:
PV = PMT × (1 − (1+r)−n) ÷ r
FV = PMT × ((1+r)n − 1) ÷ r
Annuity due: multiply the ordinary result by (1+r)
Examples
- Monthly PMT 200, APR 6%, n 60 → PV/FV estimate depending on mode
- Switch to “Annuity due” for payments at beginning of period (often higher PV/FV)
- APR 0% → PV/FV becomes roughly PMT × n
FAQ
- What is an annuity in this calculator?
An annuity here means a series of equal payments made at a regular interval (monthly, yearly, etc.) with a constant interest rate per period.
- What’s the difference between ordinary annuity and annuity due?
Ordinary annuity assumes payments at the end of each period. Annuity due assumes payments at the beginning of each period, which increases PV/FV because payments happen one period earlier.
- Do I enter an annual rate or a rate per period?
Enter the annual rate (APR-style) and choose payments per year. The calculator converts it to a periodic rate automatically.
- Does this include taxes, inflation, or fees?
No. Results are informational and assume a constant rate with equal payments. Taxes, inflation, and fees can change real outcomes.
- What if the interest rate is 0%?
With a 0% rate, PV and FV reduce to payment × number of periods (with a small adjustment for annuity due).