About the Bank Interest Calculator
Interest on a bank balance with simple or compound interest over days, months or years.
Also known as: interest on deposit, bank deposit interest, daily interest calculator.
How to use this calculator
- Enter amount, annual rate, days, interest type.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Simple: P·r·d/365 · Compound: P((1 + r/365)ᵈ − 1)
Worked example
Using the values pre-filled in the calculator above:
- Amount = 25,000
- Annual rate = 5 %
- Days = 180
- Interest type: Compound daily
the calculator returns:
- Interest: 624.06
- Total: 25,624.06
- Per day (average): 3.47