What this calculator does
Find out what money you'll receive later is worth to you today. A dollar promised in the future is worth less than a dollar in your hand. That's because money you have now can be invested and grow. Present value puts a number on that idea. It's the amount you'd need to invest today, at a given rate, to end up with the future amount.
Working back from a future amount to today is called discounting, and the rate you use is the discount rate. The calculator discounts a single future sum back to today. The money might instead come as a series of equal payments, such as an annuity, a lease or a structured settlement. In that case, add the payment and choose whether each one arrives at the start or end of its period. The calculator then adds the present value of the payments to the present value of the lump sum.
Where it's used
Why this math matters outside the classroom:
- Future sums today. Receiving $10,000 in 5 years is worth about $8,219.27 today at a 4% yearly discount rate.
- Settlement offers. People compare a lump sum now with a series of future payments by converting the payments to present value.
- Business projects. Companies discount a project's expected future cash flows to compare them with its cost today.
- Finance classes. Students see that a higher discount rate or a longer wait makes the same future amount worth less today.
Grade level and standards: Grades 11–12; Common Core State Standards for Mathematics HSA.SSE.B.4. © Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
How to use it
- Enter the future amount you expect to receive. Enter 0 if you only want to value a series of payments.
- Enter the yearly discount rate, the number of years, and how many times a year the rate compounds (is applied).
- If you like, enter a payment made once per compounding period. Then choose whether payments come at the start or end of each period.
- Read the present value, the plain total before discounting, and the gap between them, called the discount.
What the inputs mean
- Future amount
- The single sum you will receive (or need) at the end. Use 0 to value payments only.
- Annual discount rate
- The return you could earn elsewhere with similar risk, or the rate you've been told to use. A higher rate gives a lower present value.
- Compounding periods per year
- How often the discount rate is applied each year. If you enter payments, the calculator assumes one payment per compounding period.
- Payment each period
- The same amount received every period. With payments, the years must work out to a whole number of periods.
- Payments are made at the
- End of period is called an ordinary annuity. Start of period is called an annuity due. It's worth more, because each payment arrives one period sooner.
Formula and method
i = r ÷ n; N = n × years PV (lump sum) = FV ÷ (1 + i)^N PV (payments at end) = PMT × (1 − (1 + i)^(−N)) ÷ i PV (payments at start) = PMT × (1 − (1 + i)^(−N)) ÷ i × (1 + i) at 0%: PV = FV + PMT × N
In the formulas, FV is the future amount and PV is the present value. r is the yearly discount rate as a decimal, and n is the number of compounding periods per year. i is the rate for each period, and N is the total number of periods. PMT is the size of each payment.
Money grows by (1 + i) each period, so dividing by (1 + i)^N undoes N periods of that growth. The payment formula discounts each payment by its own number of periods and adds them up. Payments at the start of a period are discounted one period less. That's why that version is multiplied by (1 + i).
Worked example
You will receive $10,000 in 10 years, and the discount rate is 5% compounded annually.
- Rate per year: 0.05 ÷ 1 = 0.05. Number of periods: 1 × 10 = 10.
- Discount the $10,000: $10,000 ÷ 1.05^10 ≈ $6,139.13.
- The discount, or the gap, is $10,000 − $6,139.13 ≈ $3,860.87.
- If you also receive $1,000 at the end of each year: $1,000 × (1 − 1.05^(−10)) ÷ 0.05 ≈ $7,721.73.
Result: The $10,000 is worth about $6,139.13 today. With the ten $1,000 payments added, the total present value is about $13,860.87.
Understanding the result
Say someone offers you a sum today instead. If it's more than the present value, taking it now is the better deal at your discount rate. If it's less, waiting is better.
Present value changes a lot with the discount rate and the number of years. Try a few rates to see how much your answer depends on that choice.
Assumptions and limitations
- The discount rate stays the same the whole time and is applied n times a year.
- Any payments are all the same size and happen once per compounding period.
- You're sure to receive the money. The only way risk shows up is through the rate you choose.
- No rounding is applied in the calculation.
- It doesn't handle uneven amounts, payments that grow, or net present value (an investment's worth after its upfront cost).
- Taxes and inflation aren't handled separately. For an answer in today's buying power, use a real rate, meaning one with inflation already taken out.
- Discount rates can only be zero or positive in this calculator.
Frequently asked questions
How do I choose a discount rate?
Use the return you could reasonably earn on an investment with similar risk. You could also use what it costs you to borrow, or a rate set by whoever asked for the calculation. The higher the rate, the less a future amount is worth today.
What is the difference between an ordinary annuity and an annuity due?
An ordinary annuity pays at the end of each period, like most loan payments. An annuity due pays at the start, like rent. Each payment arrives a period sooner, so an annuity due has a higher present value.
Is present value the same as net present value?
No. Present value discounts future money back to today. Net present value then subtracts what you pay up front. That tells you whether an investment adds value at the rate you require.
Why does compounding frequency change the result?
When the rate is applied more often, money grows faster. So you need less money today to reach the same future amount. At 5% over 10 years, $10,000 is worth about $6,139.13 with yearly compounding. With monthly compounding, it's worth about $6,071.61.
How this calculator is checked
Method: Standard time-value-of-money formulas: PV = FV/(1 + i)^N and the present value of an ordinary annuity and annuity due. The calculation is covered by automated tests with known reference values and edge cases. Last updated 2026-10-18. Found a problem? Tell us.
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