Investment Calculators

Calculate SIP, Simple Interest, or Compound Interest.

$0
Total Invested
$0
Est. Returns
$0
Total Value

Visual representation of your investment growth and returns.

How This Tool Works

Operation: The Interest Calculator computes both simple and compound interest using standard financial formulas.

Simple Interest: SI = P × R × T / 100

Where P is principal, R is annual rate (%), and T is time in years.

Compound Interest: A = P × (1 + r/n)nt

Where:

  • A — Final amount (principal + interest)
  • P — Principal amount
  • r — Annual interest rate (decimal)
  • n — Number of times interest compounds per year (daily=365, monthly=12, quarterly=4, half-yearly=2, yearly=1)
  • t — Time in years

Compound Interest = A − P. The tool displays results for both interest types simultaneously, along with a comparative chart showing the growth trajectory of each over time.

Key Benefits of Using the Interest Calculator

  • Complete financial privacy: Your principal amount, interest rate, and investment terms are processed locally. No data leaves your browser — critical when calculating returns on actual savings and investment amounts.
  • Side-by-side comparison: See simple and compound interest results simultaneously with the same inputs, making the power of compounding immediately visible. The chart shows how the gap between the two grows over time.
  • Customisable compounding frequency: Choose from daily, monthly, quarterly, half-yearly, or yearly compounding to match your actual financial product — fixed deposits, recurring deposits, savings accounts, or bonds.

Practical Real-World Use Cases

  • Savings account holders projecting growth: An individual with ₹50,000 in a savings account earning 3.5% p.a. (compounded monthly) can see the projected balance after 1, 3, and 5 years — a quick check without logging into the bank portal.
  • FD investors comparing banks: An investor comparing a 7% fixed deposit (compounded quarterly) from one bank against a 7.2% FD (compounded yearly) from another can calculate which option yields higher maturity value.
  • Students learning finance fundamentals: A student studying the time value of money can input sample values and instantly see how compounding frequency and time horizon exponentially increase the final amount compared to simple interest.

Frequently Asked Questions (FAQ)

What is the difference between simple and compound interest?

Simple interest is calculated only on the principal amount. Compound interest is calculated on the principal plus previously earned interest — 'interest on interest'. Over long periods, compounding produces exponentially larger returns.

Does more frequent compounding always yield more?

Yes — but the marginal benefit diminishes. Daily compounding yields slightly more than monthly, which yields more than yearly. The difference becomes negligible beyond daily compounding due to the mathematical limit of continuous compounding.

How is this different from the CAGR calculator?

This calculator projects future value from a known rate. CAGR computes the historical rate from known start and end values. They serve opposite directions — forward projection vs. backward measurement.