Solve for the interest rate or rate of return on any investment
📊 Known Values
Enter what you know — the calculator will solve for the annual rate. Use negative for money going out (investments), positive for money coming in.
Starting value or initial investment (negative = outflow)
Ending value or maturity amount
Regular payments (negative = outflow, 0 = none)
Investment time horizon
Could not find a valid rate. Please check your inputs.
Annual Rate of Return
0%
Periodic Rate
0%
Effective Annual Rate
0%
Total Return
0%
📊 Rate Sensitivity Analysis
🔍 What If Scenarios
Method: Newton-Raphson iterative solver. Finds r where:
PV × (1+r)ⁿ + PMT × [((1+r)ⁿ − 1)/r] × (1+r×type) + FV = 0
Typically converges within 20-50 iterations to 10-decimal accuracy.
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