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Free Compound Interest Calculator

A free compound interest calculator takes your principal, annual interest rate, compounding frequency (daily, monthly, quarterly, or annually), and time in years, then shows the final amount and total interest earned. It also displays a year-by-year growth table and a principal-vs-interest chart — no signup, all math runs in your browser.

See how savings or investments grow with compounding. Enter principal amount, annual rate, choose daily/monthly/quarterly/annually compounding, and a time period in years. Get the final amount, total interest earned, an SVG bar chart of principal vs interest over time, and a year-by-year growth table. Uses the standard formula A = P(1 + r/n)^(nt). Free, no signup, nothing uploaded.

Compounding frequency

Enter principal, annual rate, compounding frequency, and years to see the final amount, total interest, growth chart, and year-by-year table.

Runs 100% in your browser. Your data never leaves your device.

Uses the standard compound interest formula A = P(1 + r/n)^(nt), where P is principal, r is the annual rate as a decimal, n is compounds per year (365 / 12 / 4 / 1), and t is years. Year-by-year rows evaluate the same formula at each year end. The chart is inline SVG stacked bars — pure JavaScript math, no libraries or backend.

How to Use Compound Interest Calculator

  1. Enter the principal amount in rupees
  2. Enter the annual interest rate (e.g. 8 for 8%)
  3. Choose compounding frequency: Daily, Monthly, Quarterly, or Annually
  4. Enter the time period in years
  5. Review final amount, total interest, the growth chart, and the year-by-year table

When Would You Use This?

Savers comparing FD or recurring-style quotes change compounding from annually to quarterly or monthly to see how much extra interest frequency adds for the same headline rate.

Long-term investors paste a starting corpus and a conservative rate to sketch what a 10- or 20-year horizon looks like before opening a brokerage sheet.

Anyone planning a loan vs investing trade-off can open this beside the Loan EMI Calculator — one shows repayment cost, the other shows what the same money might earn if invested instead.

Frequently Asked Questions

Is this compound interest calculator free to use?
Yes, completely free. No signup, no login, no payment ever.
Do I need to create an account?
No account needed. Enter the inputs and see results immediately.
Is my data safe?
Everything runs in your browser. Principal, rates, and years are never uploaded to our servers.
What formula does this calculator use?
A = P(1 + r/n)^(nt), where P is principal, r is annual rate as a decimal, n is the number of compounding periods per year, and t is time in years. Total interest is A − P.
What compounding frequencies are supported?
Daily (365), monthly (12), quarterly (4), and annually (1).
Can I enter fractional years?
Yes. For example, 2.5 years calculates the final amount at 2.5 years and adds a final row in the growth table for that partial period after the full years.
How is this different from a loan EMI calculator?
Compound interest models growth on a lump sum (money you invest or save). An EMI calculator models repayment of a loan with monthly instalments. Use both when comparing “borrow and pay EMI” vs “invest and earn interest.”
Does this work offline?
Yes. Once the page has loaded, all calculations work fully offline.

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