How This Future Value Calculator Works

Future value is what a sum today grows to when it earns compound interest. Each year the balance grows by the rate, and the next year the interest is calculated on the bigger balance — that compounding is why the growth accelerates over time.

Worked example: $10,000 invested at 5% a year for 10 years. FV = $10,000 × (1.05)10 = $16,288.95. Interest earned = $6,288.95 — a 62.9% gain, with no extra deposits.

Practical tips

Small rate changes matter a lot.

At 5% the $10,000 becomes $16,289; at 7% it becomes $19,672; at 3% only $13,439. A 2-point difference is a $3,200 swing over ten years.

Use it to price a goal.

Want $50,000 in 10 years at 6%? The future value of $27,920 today is $50,000 — so that is the lump sum you would need now. The Present Value Calculator does this directly.

Inflation shrinks the answer.

This is the nominal future value. At 3% inflation, $16,289 in ten years buys about what $12,114 buys today.

Adding contributions changes everything.

This calculator grows a single sum. To add monthly deposits, use the Investment Growth Calculator instead.