Savings Interest Calculator — Compound Growth & Final Balance

Estimate your final balance with compound interest and optional monthly contributions.

Currency

Starting balance

Interest rate (AER/APR %)

Monthly contribution optional

Time (years)

Compounding frequency

Contribution timing

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Final balance

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After interest + contributions

Total contributions

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Monthly × months + starting

Interest earned

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Final − contributions

Growth

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Final ÷ starting

Note: This is an estimate. Real accounts may use AER, different compounding, variable rates, and contribution timing.