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

Inflation Rate Calculator

Compute the percentage change between two Consumer Price Index values, the standard measure of inflation between any two time periods. Returns a percentage that can be positive (inflation) or negative (deflation).

Initial CPI

Final CPI

Key differences

	Compound Interest Calculator	Inflation Rate Calculator
Category	Economics	Economics
Inputs required	3	2
Result	Final Amount ($)	Inflation Rate (%)
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.	Compute the percentage change between two Consumer Price Index values, the standard measure of inflation between any two time periods. Returns a percentage that can be positive (inflation) or negative (deflation).