Simple Interest Calculator
Quickly calculate interest and maturity value for your loans and deposits
Total Maturity Amount
โน1,50,000
Principal
โน1,00,000
Total Interest
โน50,000
In simple interest, the interest amount remains the same every year because it is only calculated on the initial principal.
๐ Simple Interest Guide โ The Basics of Finance
"Simple Interest is the most basic way to calculate interest. It is primarily used in short-term financial transactions where the interest is not reinvested."
โ๏ธ The Formula
The SI formula is (P ร R ร T) / 100.
- P is the Principal (Starting Amount).
- R is the Annual Interest Rate (%).
- T is the Time (Years).
๐ก๏ธ Where it's Used
Simple interest is commonly used for personal loans between friends, some auto loans, and calculating interest on overdue payments or discounts.
๐ SI vs Compound Interest
- โCalculation BaseSI is only on Principal; CI is on Principal + Earned Interest.
- โGrowth SpeedSI grows linearly; CI grows exponentially.
- โUsageSI is for short term; CI is for long term (Mutual Funds, FD, PPF).
- โComplexitySI is very easy to calculate manually.
Time Conversion Tip
Always ensure that the interest rate (R) and time period (T) are in the same unit. If R is per annum, T must be in years. If you have months, divide them by 12.