Loading...
Loading...
money
Free compound interest calculator. See how savings or investments grow with monthly, quarterly or yearly compounding. Includes the formula and clear results.
Enter your values and select Calculate to see the result.
Compound interest adds the interest you earn back to the balance, so the next round of interest is calculated on a larger amount. This snowball effect is why long-term savings and investments can grow so much, and why unpaid debt can become expensive.
Enter the starting amount, the annual rate, the number of years and how often interest is added each year. The calculator shows the total interest and the final balance. It assumes no further deposits or withdrawals, so it shows the growth of a single lump sum.
A = P(1 + r/n)ⁿᵗ
Choose monthly compounding to model a typical savings account.
Estimates only. This calculator gives a general estimate and is not financial, tax or legal advice. Rates, fees and rules vary by country and situation. Read our disclaimer.
Interest is added to your balance at regular intervals and then earns interest itself. The balance grows as P × (1 + r ÷ n)^(n × t).
It is how many times a year interest is added: 1 for yearly, 4 for quarterly, 12 for monthly and 365 for daily. More frequent compounding gives slightly more growth.
No. The calculator assumes a single starting amount with no extra deposits or withdrawals.
No. The rate you enter is the nominal annual rate. Because of compounding, the effective yearly growth is a little higher than the nominal rate.