Interest Rate Calculator
Enter the starting amount, the ending amount and the number of years to find the annual interest rate.
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Enter the starting and ending amounts and years to see the rate.
Worked example
With these example inputs:
- Starting amount$5,000
- Ending amount$6,800
- Number of years4 yr
Interest rate: 7.99%
- Total growth36.0%
Frequently asked questions
How is the interest rate calculated?
Divide the ending amount by the starting amount, raise to one over the years and subtract one. Growing $1,000 to $1,500 over 5 years implies about 8.45% a year.
Does it assume compounding?
Yes, this is the annual compound rate that links the two amounts. It smooths the path into a single steady rate, ignoring any ups and downs along the way.