Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Future Value Calculator

Project what a lump sum plus regular yearly contributions will grow to at a given rate of return. Use it to forecast investments, savings plans, and retirement balances.

Present Value (starting amount) ($)

Annual Return Rate (%)

Number of Years (years)

Annual Contribution ($)

Economics

Compound Interest Calculator

Project the future value of a lump-sum investment when interest is reinvested each year using A = P · (1 + r)ᵗ. The simplest compounding model — assumes annual compounding, a constant rate, and no additional contributions or withdrawals.

Principal Amount ($)

Annual Interest Rate (%)

Time Period (years)

Key differences

	Future Value Calculator	Compound Interest Calculator
Category	Financial	Economics
Inputs required	4	3
Result	Future Value ($)	Final Amount ($)
What it does	Project what a lump sum plus regular yearly contributions will grow to at a given rate of return. Use it to forecast investments, savings plans, and retirement balances.	Project the future value of a lump-sum investment when interest is reinvested each year using A = P · (1 + r)ᵗ. The simplest compounding model — assumes annual compounding, a constant rate, and no additional contributions or withdrawals.