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Home › Calculators › Compound Interest

Compound Interest Calculator

See how savings grow with compounding - plus optional monthly deposits.

Initial deposit ($)

Annual rate (%)

Years

Monthly deposit ($)

Formula

A = P(1+r/n)^(nt) + PMT·(((1+r/n)^(nt)−1)/(r/n))

Compounded monthly (n=12). Example: $10k + $100/mo at 6% for 10 years ≈ $35k.

📖 Learn more: Compound interest guide: formula, frequency & growth tables

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