About This Calculator
This tool helps you calculate the initial principal needed to reach a specific future value through compound interest, based on a fixed rate and investment period.
How It Works
- Enter your target final amount.
- Input the annual interest rate (as a percentage).
- Enter the investment period in years or periods.
- The calculator returns the required starting principal.
Initial Principal =
Final Amount(1 + Interest Rate)Number of Periods
Frequently Asked Questions
What is compound interest?
It's interest calculated on both the initial principal and the accumulated interest over time.
How does this calculator work?
It reverses the compound interest formula to find the principal needed to reach your goal.
Is it usable for any currency?
Yes, just use consistent units—the currency type doesn’t affect the calculation.