Banking · Interest
Interest Calculator
Free simple-interest calculator for India. Principal, rate, and tenure go to FinanceControl’s banking-service — SI = P × R × T / 100 with a 365-day year. Educational estimates, not a bank quote.
Simple interest on a principal — SI = P × R × T / 100. Time uses days ÷ 365 or months ÷ 12. No compounding, fees, or tax.
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Results update as you type
Amount you start with
Nominal % p.a.
T = duration
Recorded only — simple interest does not compound
Principal
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Simple interest
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Maturity amount
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Time in years
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Principal vs interest
Balance over tenure
Linear SI — no compounding
FAQ · simple interest
What formula does this use?
Simple interest: SI = P × R × T / 100, Amount = P + SI. T is in years (days ÷ 365, months ÷ 12, or years as entered).
Does compounding change the result?
No. This calculator is simple interest only — principal never compounds. Posting frequency is recorded for explanation and does not change SI.
Why 365 days, not 360?
Banking-service uses a 365-day year. Leap years are not special-cased. Some products use 360 or Actual/Actual — always check the bank’s convention.
Is this financial advice?
No. Results are educational estimates from FinanceControl’s banking-service. They are not a quote, approval, or tax computation.
Educational simple-interest estimate only — not a bank quote, tax advice, or a deposit offer. Banks may use different day-count conventions, compound, deduct TDS, or apply fees. Verify with the institution before you decide.