Calculators
Compound Interest Calculator
See how savings grow with compounding and regular contributions.
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About this compound interest calculator
Compound interest is interest earned on interest. The effect is small over a year and dramatic over decades, which is why the compounding frequency and the term matter more than most people expect.
This calculator supports annual, quarterly, monthly and daily compounding, plus optional regular contributions.
How to use it
- Enter your starting balance and annual interest rate.
- Set the term and how often interest compounds.
- Add a monthly contribution if you make one, then read the yearly growth table.
Compound Interest Calculator — FAQ
What is the compound interest formula?
A = P(1 + r/n)^(nt), where n is the number of compounding periods per year and t the number of years.
Does it account for inflation or tax?
No. The figures are nominal — real returns after inflation and tax will be lower.
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