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Simple Interest Calculator

Calculate Simple Interest instantly with year-wise breakdown, interactive charts, and complete financial analytics.

💰 Enter Details

Principal Amount (P)₹1,00,000

₹

₹1K₹50L₹1Cr

Interest Rate (R)10%

1%15%30%

Time Period (T)5 Years

Yrs

1 Yr20 Yrs40 Yrs

📐 SI = P × R × T / 100

SI = ₹1,00,000 × 10 × 5 / 100

💰 Result

💰

Enter principal, rate, and time to see your simple interest calculation.

🏆 Total Amount (P + SI)

₹0

💰 Principal

₹0

📈 Interest

₹0

📊 Rate

10%

⏱️ Time

5 Years

💵 Interest/Year

₹0

📅 Interest/Month

₹0

🗓️ Interest/Day

₹0

💹 Return %

📅 Maturity Year

2030

💎 Wealth Gained

₹0

🍩 Principal vs Interest

📊 Year-wise Growth

📋 Year-wise Breakdown

Year	Opening	Interest	Total Interest	Closing

📖 How to Use

💰

Enter Principal

Type your investment amount in ₹

📊

Set Rate

Enter annual interest rate %

⏱️

Choose Time

Years, Months, or Days

📈

Get Results

Charts, table & analytics

📐 Formula

Simple Interest Formula

SI = P × R × T / 100

SI = Interest Earned

P = Principal Amount

R = Rate % per annum

T = Time in Years

A = P + SI (Total)

Note: Interest on principal only

❓ FAQs

What is Simple Interest?▼

Simple Interest is calculated only on the original principal. For ₹1L at 10% for 5 years: ₹10,000/year × 5 = ₹50,000 total interest.

SI vs Compound Interest?▼

SI is linear (same each year). CI is exponential (grows each year). For ₹1L at 10% for 5 years: SI=₹50,000 but CI=₹61,051. CI is always more for periods > 1 year.

Can I calculate for months/days?▼

Yes! Use the toggle buttons to switch between Years, Months, and Days. The calculator automatically converts to years for the formula.

Where is SI used?▼

SI is used in short-term loans, car loans (flat rate), some FDs, government bonds, and agricultural loans.

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