Compare calculators

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

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)

Economics

Present Value Calculator

Discount a future cash amount back to today's value using PV = FV / (1 + r)ᵗ. The foundation of every cash-flow valuation in finance — bonds, equities, projects, real estate, insurance, and any decision that trades current money against future money.

Future Value ($)

Discount Rate (%)

Number of Periods (years)

Key differences

	Compound Interest Calculator	Present Value Calculator
Category	Economics	Economics
Inputs required	3	3
Result	Final Amount ($)	Present Value ($)
What it does	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.	Discount a future cash amount back to today's value using PV = FV / (1 + r)ᵗ. The foundation of every cash-flow valuation in finance — bonds, equities, projects, real estate, insurance, and any decision that trades current money against future money.