Interest Rate Calculator
Solve for the annual interest rate given starting amount, ending amount, and time.
About this calculator
The Interest Rate Calculator on NumberCals is a free, mobile-friendly tool for anyone needing to solve for the annual interest rate given starting amount, ending amount, and time. Enter your values in the form below and the result is computed instantly — no sign-up, no installation, no waiting.
Formula used
r = (FV / PV)^(1/n) − 1
What you'll need
- Present Value (e.g. 10000)
- Future Value (e.g. 15000)
- Years (e.g. 5)
What you'll get
- Implied Annual Rate (%)
Formula
r = (FV / PV)^(1/n) − 1
Result
Frequently Asked Questions
How is this different from CAGR? +
It's the same calculation — both solve for the constant rate that takes PV to FV over n years.
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