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Calculators » Finance » Compound Interest

Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate compound interest over a given period of time using different compounding frequencies viz., daily, monthly, quarterly, half-yearly and yearly.

You can solve for all four variables viz., **A**, **P**, **t** and **r** involved in compound interest calculation using this calculator.

**Ex 1.** What is the compound interest of 75000 at 7.9% per annum compounded annually in 5 years?

**Ans.** Accrued Amount: 109690.37, Total Interest: 34690.37

**Ex 2.** How much will I earn if I invest 1000 for 20 years at 8% interest rate compounded monthly?

**Ans.** Accrued Amount: 4926.8, Total Interest: 3926.8

**Ex 3.** In how many years will 10000 become 20000 at 10% interest rate compoundedy quarterly?

**Ans.** Solving for time period gives 7.02 year(s)

**Ex 4.** At what rate will 10000 become 20000 in 5 years with yearly compounding?

**Ans.** Solving for interest rate gives 14.87%

The formula for compound interest:

A = P(1+r/n)^{⌊nt⌋}

Where,

A = Amount function

P = Principal amount (Initial Investment)

t = Total time in years

n = Number of compounding periods per year

r = Annual interest rate

⌊nt⌋ means that nt is rounded down to the nearest integer.

Compounding is a very powerful concept in financial planning. You can see it at work in your retirement fund and in any deposits in your bank account.

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