Utility Calculators — Age, Percentage, Interest & More

Everyday calculators for quick calculations — find your exact age, calculate percentages, compare simple vs compound interest, find required rates of return, and compute discounts instantly.

All Utility Calculators

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Online Age Calculator – Calculate Exact Age

Calculate your exact age in years, months, and days from date of birth. Know your age on any date — past, present, or future. Includes age at next...

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Percentage Calculator

Calculate percentages instantly — X% of Y, percentage change, percentage increase and decrease. Multiple calculation modes including markup, margin,...

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Compound Interest Calculator

Calculate compound interest with monthly, quarterly or yearly compounding. See how your money grows.

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Simple Interest Calculator

Calculate simple interest on any principal at any rate. Compare with compound interest.

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Discount Calculator

Calculate discount amount and final price instantly. Supports double discount, buy-X-get-Y, markup and margin calculations. Compare original price vs...

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Interest Rate Calculator

Reverse calculate the effective interest rate (CAGR) required to reach your target maturity amount from an initial principal investment.

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Rule of 72 Calculator

Quickly estimate how long it will take for your investment to double using the mathematical Rule of 72.

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Inflation Adjusted Return Calculator

Calculate the real return of your investments after accounting for inflation using the Fisher equation.

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Inflation Calculator

Calculate how inflation has changed the value of the US dollar from 1913 to 2025 using CPI data. Project future purchasing power and find what your salary should be today.

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💡 Why Use Utility Calculators?

Our utility calculators cover everyday math that saves you time. Whether you're computing a sale discount, calculating interest rates, or figuring out compound interest on your savings — these tools give you instant, accurate results.

The Compound Interest Calculator helps you visualize the power of compounding across monthly, quarterly, and yearly frequencies. The Rule of 72 Calculator tells you how long until your money doubles. Each tool is designed to be fast, mobile-friendly, and completely free.

Pro tip: Compound interest vs simple interest on ₹1L at 8% for 5 years — CI gives ₹1,48,985 while SI gives ₹1,40,000. That's ₹8,985 extra from compounding alone!