Compound interest and savings calculator
Shows how a starting amount and regular savings grow over the years when interest also earns interest.
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How it works
- Enter starting amount, monthly savings, interest rate and duration.
- Choose how often interest is credited and when you pay in.
- Click “Calculate” – final balance, total deposits, interest and a yearly table appear.
Notes and limitations
- Interest is calculated monthly on the current balance and credited monthly, quarterly or yearly as chosen.
- No taxes, fees or inflation are included; the interest rate stays constant over the whole period.
- This calculation is for information only and is not financial advice.
Frequently asked questions
What does the “rule of 72” say?
Divide 72 by the interest rate to estimate how many years it takes to double your money – at 6 % about 12 years.