318+ Free Online Tools

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Factorial Calculator

Calculate factorial (n!), permutations (nPr) and combinations (nCr) instantly.

Finance & Calculators Use free →

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Average Calculator

Calculate arithmetic, geometric and harmonic mean, plus weighted averages.

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Prime Number Checker

Check if a number is prime and find its prime factorisation. List all primes in a range.

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Percentage Difference Calculator

Calculate percentage difference, percentage change and percentage error between values.

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Business Days Calculator

Count working days between two dates or add business days to a start date.

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Work Hours Calculator

Calculate total work hours, overtime and pay across a working week.

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🎂

Age in Days Calculator

Find your exact age in days, hours and minutes — and countdown to your next birthday.

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Days Until Calculator

Live countdown to any future date in days, hours, minutes and seconds.

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Time Duration Calculator

Add or subtract multiple time durations and convert between time formats.

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Area Converter

Convert between square metres, acres, hectares, square feet and more area units.

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Volume Converter

Convert between litres, gallons, cups, fluid ounces and more volume units.

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Speed Converter

Convert between km/h, mph, m/s, knots and Mach.

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Pressure Converter

Convert between Pascal, bar, PSI, atmosphere and more pressure units.

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Energy Converter

Convert between joules, calories, kilowatt-hours, BTU and more energy units.

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Cooking Measurement Converter

Convert cups, tablespoons, teaspoons, ml and ounces. Includes a recipe scaler.

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File Size Converter

Convert between bytes, KB, MB, GB, TB in both decimal (SI) and binary (IEC) standards.

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Gold Price Calculator

Calculate gold value by weight, karat and current price. Includes GST at 3%.

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Tax Bracket Calculator

Find your income tax bracket and effective rate under Old or New Regime FY 2024-25.

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Stock Return Calculator

Calculate stock investment returns, CAGR and compare against FD returns.

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Crypto Profit Calculator

Calculate crypto trading profit or loss including 30% India tax and 1% TDS.

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Monthly Budget Planner

Plan monthly income and expenses with 50/30/20 rule analysis and visual breakdown.

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Loan Comparison Calculator

Compare up to 3 loan options side by side — EMI, total payment and interest.

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Rent vs Buy Calculator

Compare the long-term financial cost of renting versus buying a home.

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Roman Numeral Converter

Convert between Arabic numbers and Roman numerals (1–3999).

Text & Content Use free →