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v2.4.0 • Updated 2026

Interest Calculator

Simple or Compound? See the difference. Calculate returns on your loans or investments and visualize wealth growth.

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Investment Details

₹
%
Yr
Mo

Total Interest Earned

₹ 46,932.81

Maturity Value: ₹ 1,46,932.81

compound Interest Mode
Growth Comparison
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Concept Guide

Simple vs. Compound Interest

Simple Interest (SI)

Interest is calculated only on the Principal amount. It remains constant every year.

Formula: P × R × T / 100

Compound Interest (CI)

Interest is calculated on Principal + Accumulated Interest. Your money earns interest on interest.

Formula: P (1 + r/n)^(nt) - P

Why Compound Interest Wins

Albert Einstein called Compound Interest the "Eighth Wonder of the World". In the long run, CI grows exponentially while SI grows linearly. The frequency of compounding (Monthly vs Yearly) also accelerates growth.

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When Should You Use These Calculators?

Whether you're saving, spending, or investing — here's exactly when this calculator can help you make a smarter decision.

Before Making an Investment

Estimate returns and risks before putting your money to work.

investment calculator, investment planning

Comparing Financial Plans

Side-by-side compare plans to pick the smartest option.

compare plans, financial comparison

Planning Long-Term Goals

Map out savings milestones to reach your future targets.

long term financial goals, goal planning

Checking Affordability

Know instantly if a purchase fits inside your budget.

affordability check, can I afford

Before Taking a Loan

Understand EMIs, interest & total cost before you borrow.

loan calculator, EMI calculator

Budgeting a Major Purchase

Break big-ticket items into a realistic payment plan.

budget calculator, major purchase planning

Evaluating Savings Returns

See how compound interest grows your savings over time.

savings calculator, compound interest

Planning for Retirement

Figure out how much you need saved before you retire.

retirement calculator, retirement planning

Deciding Between Options

Remove the guesswork when choosing between two paths.

financial decision, compare options

Before Consulting an Advisor

Walk in prepared with real numbers, save time & money.

financial advisor prep, quick estimate

Ready to crunch some numbers? It's free & takes less than a minute.

Popular calculator use cases

  • Before Making an Investment: investment calculator, investment planning
  • Comparing Financial Plans: compare plans, financial comparison
  • Planning Long-Term Goals: long term financial goals, goal planning
  • Checking Affordability: affordability check, can I afford
  • Before Taking a Loan: loan calculator, EMI calculator
  • Budgeting a Major Purchase: budget calculator, major purchase planning
  • Evaluating Savings Returns: savings calculator, compound interest
  • Planning for Retirement: retirement calculator, retirement planning
  • Deciding Between Options: financial decision, compare options
  • Before Consulting an Advisor: financial advisor prep, quick estimate