Simple & Compound Interest
An educational calculation, not financial advice — real accounts vary by fees, compounding schedule, and rate changes.
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Educational tool, not financial advice. This is a simplified model for learning purposes — real accounts involve fees, taxes, and rate changes this calculator doesn't account for. See our terms for details.
—Final amount
—Interest earned
The formulas
Simple interest: A = P × (1 + r × t)
Compound interest: A = P × (1 + r/n)^(n×t), where n is the number of times interest compounds per year.
This is a simplified educational model — it doesn't account for taxes, fees, variable rates, or additional contributions over time.