Free Online Unit Converter
Convert length, weight, temperature, currency, and 20+ unit types instantly. Free, fast, and works on any device.
- 20+ converter types — length, weight, temperature, currency & more
- Instant results in your browser — no signup required
- Bulk convert up to 1,000 values with CSV import/export
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Convert up to 1,000 values at once. Paste from Excel or upload CSV.
Conversion Quiz
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Popular Tools
Length Converter
Convert between centimeters, inches, meters, feet, yards, kilometers, and miles
Weight Converter
Convert between kilograms, pounds, grams, ounces, tons, and stone
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Currency Converter
Convert between 40+ world currencies including USD, EUR, GBP, JPY, CNY, INR, and more
Area Converter
Convert between square meters, square feet, acres, hectares, and more area units
Volume Converter
Convert between liters, gallons, cups, milliliters, ounces, and more volume units
Speed Converter
Convert between mph, km/h, m/s, knots, and more speed units
Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB, and media storage units. Includes binary (1024) and decimal conversions, plus CD/DVD/Blu-ray capacities.
Energy Converter
Convert between joules, calories, BTU, kWh, and more energy units. Perfect for physics, nutrition, and electricity calculations.
Power Converter
Convert between watts, horsepower, BTU/h, and more power units. Essential for automotive, electrical, and HVAC calculations.
Torque Converter
Convert between newton-meter, foot-pound, kilogram-force meter, and more torque units. Essential for automotive and mechanical engineering.
Fuel Economy Converter
Convert between MPG (US/UK), L/100km, km/L, and more fuel economy units. Compare car efficiency across different measurement systems.
Popular Conversions
Frequently Asked Questions
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