Calculate present value, future value, payment, interest rate, or number of periods for any annuity — ordinary or annuity-due.
Annuity Details
Solve for any missing variable
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Future Value
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Total Contributions
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Total Contributions
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Interest Earned
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Growth Multiple
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Total Periods
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Payment (PMT)
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Annual Rate
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Years
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Total Periods
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Type
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Total Contributions
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Interest Earned
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Future Value
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Present Value
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FAQ
What is an annuity?
An annuity is a series of equal payments made at regular intervals. Financial annuities include insurance products that pay a regular income stream. In mathematics, an annuity formula is used to evaluate any recurring cash flow.
What is an ordinary annuity vs annuity-due?
Ordinary annuity: payments are made at the END of each period (most common — mortgages, bonds). Annuity-due: payments are made at the START of each period (e.g., rent). Annuity-due produces a slightly higher future value.
What is the future value formula?
FV = PMT × [(1+r)^n − 1] / r, where r is the per-period interest rate and n is the number of periods. For annuity-due, multiply by (1+r).
What is present value of an annuity?
PV = PMT × [1 − (1+r)^−n] / r. This tells you what a stream of future payments is worth today — useful for valuing pensions, lottery winnings, and insurance products.