Compound Interest Calculator
Calculate compound interest over time.
How to Calculate
A = P(1 + r/n)^(nt)
P is the principal, r is the annual rate (decimal), n is compounding frequency per year, t is years. A is the final amount.
Worked Example
Principal: £10,000, Rate: 5%, Compounded annually, 10 years → A = 10000(1.05)^10 = £16,288.95. Interest earned: £6,288.95.