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Future Worth Calculator | Calculate future value of an investment

Quick reference

$10,000 at	10 years	20 years	30 years
3%	$13,439	$18,061	$24,273
6%	$17,908	$32,071	$57,435
9%	$23,674	$56,044	$132,677

info Future Worth Calculator

Free finance calculator — enter your numbers and get an instant, accurate result.

info Private by design

Everything runs locally in your browser. No uploads, no accounts, no tracking.

info Works everywhere

Fully responsive and mobile-friendly — calculate on any device, any time.

info Educational

Includes the formula and step-by-step explanation so you understand the math, not just the answer.

Interpretation guide

Driver	Effect on future value
Time	Largest lever — compounding accelerates late
Rate	Exponential; small changes compound hugely
Compounding frequency	More frequent = slightly higher FV
Regular deposits	Add an annuity on top of the lump sum

lightbulb Worked example

Let's say you are using the Future Worth Calculator. Future Worth Calculator is a free online calculator that helps you work out future worth quickly and accurately, right in your browser. Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula FV = PV x (1 + r)^n; with deposits: FV = PMT x [((1 + r)^n - 1) / r] and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: FV = PV x (1 + r)^n; with deposits: FV = PMT x [((1 + r)^n - 1) / r]

The Future Worth Calculator is built on a well-established calculation method. It uses the formula FV = PV x (1 + r)^n; with deposits: FV = PMT x [((1 + r)^n - 1) / r] to turn your inputs into a reliable result. Future Worth Calculator is a free online calculator that helps you work out future worth quickly and accurately, right in your browser. The steps are shown on the page so you can follow the reasoning from input to output.

How future value (future worth) is calculated

Future value answers "what will this money be worth later?" by applying compound interest over time.

Lump sum

$10,000 at 6% for 20 years: FV = 10,000 x (1.06)^20 = 10,000 x 3.2071 = $32,071.

With regular deposits

Add the annuity formula for recurring contributions. $200/month at 6% (0.5%/mo) for 20 years (240 months) grows to about $92,400 on its own, on top of any starting lump sum.

For monthly compounding, divide the annual rate by 12 and use months as the period count.

Authoritative source: Consumer Financial Protection Bureau

Frequently asked questions

How do you calculate future value?

For a lump sum, future value = present value x (1 + r)^n, where r is the rate per period and n is the number of periods. For example, $10,000 at 6% for 20 years grows to 10,000 x 1.06^20 = $32,071. Regular deposits add a separate annuity term on top of the lump-sum growth.

What is the difference between future value and present value?

Future value tells you what a sum today will be worth later after earning interest. Present value does the reverse — it discounts a future amount back to what it is worth today. They use the same rate; future value multiplies by (1 + r)^n while present value divides by it.

How does compounding frequency affect future value?

More frequent compounding produces a slightly higher future value because interest starts earning interest sooner. Monthly compounding beats annual, and daily beats monthly, but the gap shrinks at each step. Convert the annual rate to the period rate (divide by 12 for monthly) and count periods accordingly.

How long does it take to double my money?

Use the Rule of 72: divide 72 by the annual percentage rate to estimate the doubling time in years. At 6%, money doubles in about 72 / 6 = 12 years; at 9%, about 8 years. It is an approximation, but it is accurate enough for rates in the typical investing range.

Does future value account for inflation?

Not by default — standard future value uses the nominal interest rate. To see future worth in today's purchasing power, either discount the result by expected inflation or use a real rate of return (nominal rate minus inflation) in the formula. This 'real' future value shows what the money will actually buy.

What formula does an FV (future value) calculation use?

FV = PV × (1 + r)ⁿ for a lump sum: $10,000 at 6% for 15 years grows to $23,966. With recurring deposits, add the annuity term PMT × ((1+r)ⁿ − 1)/r — $200/month at 6% for 15 years contributes another $58,164. Spreadsheet FV() and this calculator agree when compounding frequency matches; mismatched monthly-versus-annual compounding is the usual source of differing answers.

How much will $10,000 be worth in 20 years at 7%?

With FV = PV × (1 + r)ⁿ: $10,000 × 1.07²⁰ ≈ $38,697 — nearly four times the original, which is the power of compounding over two decades. The same $10,000 at 3% would only reach about $18,061. Small rate differences explode over long horizons, which is why the tool shows the growth path.

How do regular deposits change the future value?

Deposits add the annuity term: FV = PMT × (((1 + r)ⁿ − 1) ÷ r), so $200/month at 7% annual for 20 years grows to roughly $104,000 — most of it from the deposits, but compounding adds tens of thousands on top. Starting early beats contributing more later because each deposit compounds for longer. The calculator combines lump sum and recurring deposits in one figure.

What interest rate should I assume for long-term planning?

Use a realistic after-inflation rate: the US stock market has averaged about 7% real return historically, while savings accounts hover near 1–2% real. Conservative planners often model 5–6% to leave a safety margin. The tool lets you test multiple rates side by side so you can see how sensitive your goal is to the assumption.

Does it account for inflation and taxes?

The formula compounds the nominal rate you give it — it does not subtract inflation or taxes on its own. To get a real-terms figure, use an inflation-adjusted rate (nominal minus expected inflation, roughly). Treat the result as a planning estimate, not a guarantee: future returns are the one input nobody knows.

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