📈 Compound vs Simple Interest Calculator

Instantly compare investment growth for compound and simple interest.
Supports monthly deposit (installment plan) and one-off principal.

Compound   Simple
Compare compound and simple interest, with or without monthly deposits.
100% browser-based. No login. No data sent anywhere.

FAQ – Compound vs Simple Interest Calculator

What is the difference between compound and simple interest?
Compound interest earns interest on both your principal and previously earned interest. Simple interest earns interest only on your original principal.
Can I add monthly deposits in this calculator?
Yes, you can add a fixed monthly deposit. Both compound and simple interest results will include your monthly contributions.
Which compounding frequency is best?
More frequent compounding (e.g., monthly or daily) can increase total returns, especially for long-term investments.
Is my data uploaded or saved?
No. All calculations run entirely in your browser. No personal or financial data is stored or sent anywhere.
Is this calculator free to use?
Yes! It is 100% free, browser-only, and works on desktop and mobile devices.
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