Annuity calculator

Value a stream of equal payments with end-of-period or beginning-of-period timing.

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Annuity calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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Payment each period

Rate per period (%)

More inputs and assumptions

Number of periods

Payment timing: 0 end, 1 beginning

Answer

…

Ordinary future value = payment × ((1 + r)^n − 1)/r. Multiply by (1 + r) for beginning-of-period payments. Present value = future value/(1 + r)^n.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

Save the current answer, then change an input to compare. This clears when you leave.

Formula and assumptions

Each payment and rate use the same period. Ordinary annuity payments occur at the end; annuity-due payments occur at the beginning. This is an arithmetic annuity, not a life-contingent insurance product. Fixed assumptions only: no taxes, fees, changing returns, guarantees or product eligibility. Amounts share one currency.

Automatic precision shows money to two decimal places and other numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-26

Using Annuity calculator

Ordinary future value = payment × ((1 + r)^n − 1)/r. Multiply by (1 + r) for beginning-of-period payments. Present value = future value/(1 + r)^n.

Next: Annuity payout calculator

A worked example

Example inputs: payment each period = 100, rate per period (%) = 10, number of periods = 2, payment timing: 0 end, 1 beginning = 0. Future value of payments = 210.

Before you use the result

Example results for payment each period

These examples use Rate per period (%): 10; Number of periods: 2; Payment timing: 0 end, 1 beginning: 0. They are reference calculations, not recommended settings.

Payment each period	Future value of payments
50	105.00
100	210.00
200	420.00

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