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Basic Math

Simple Interest Calculator

Calculate simple interest payouts and maturity balances instantly with customized tenure options.

Principal Amount (₹) Principal
Rate of Interest (% p.a.) Annual rate
%
Tenure Mode Years
Estimated Future Value
₹1,50,000.00

Calculated on flat linear simple interest.

66%
Principal
Principal: 66.7%
Interest Accrued: 33.3%
Initial Principal
₹1,00,000.00
Interest Accrued
₹50,000.00
Future Yield Balance
₹1,50,000.00

Interest Accumulation Timeline

Detailed timeline schedule showing linear growth of principal and interest payouts.

Year Opening Principal (₹) Interest Accrued (₹) Closing Balance (₹)

Understanding Simple Interest

The primary math model for short-term and non-cumulative loans.

What is Simple Interest?

Simple Interest is calculated only on the initial principal amount of a loan or deposit. It does not compound, meaning the amount of interest earned or charged remains constant in each period.

Formula:
SI = (P × R × T) / 100
• P = Principal Amount
• R = Annual Rate of Interest (%)
• T = Time period in years (e.g. days/365, months/12)

Simple vs Compound Interest

Simple interest is typically used for short-term retail loans, agricultural loans, or simple business deposits. Compound interest is far more common for long-term savings, bonds, or standard bank deposits. Over time, compound interest grows much faster because it pays interest on the accrued interest.