Banking · Interest
Compound Interest Calculator
Free compound-interest calculator for India. Principal, rate, tenure, and compounding frequency go to FinanceControl’s banking-service — A = P × (1 + r/n)^(n×t) with a 365-day year. Educational estimates, not a bank quote.
Compound interest on a principal — A = P × (1 + r/n)^(n×t), CI = A − P. Time uses days ÷ 365 or months ÷ 12. No fees or tax.
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Amount you start with
Nominal % p.a.
T = duration
n = 12
Principal
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Compound interest
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Maturity amount
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Effective annual rate
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Principal vs interest
Balance over tenure
Compound growth path (local estimate)
FAQ · compound interest
What formula does this use?
Compound interest: A = P × (1 + r/n)^(n×t), CI = A − P. r is the nominal annual percent ÷ 100. n is compounding periods per year. t is in years (days ÷ 365, months ÷ 12, or years as entered).
What is effective annual rate (EAR)?
EAR = ((1 + r/n)^n − 1) × 100. It is the yearly yield after compounding, so monthly 8% is about 8.30% EAR — higher than the nominal rate.
Does more frequent compounding always earn more?
Yes, for the same principal, rate, and tenure. Daily compounding yields slightly more than monthly, which yields more than yearly. The difference shrinks as n grows.
Why 365 days, not 360?
Banking-service uses a 365-day year. Leap years are not special-cased. Incomplete periods use the real exponent, not leftover simple interest. 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 compound-interest estimate only — not a bank quote, tax advice, or a deposit offer. Banks may use different day-count conventions, residual simple interest, deduct TDS, or apply fees. Verify with the institution before you decide.