Unit Converters
Convert between units of length, weight, temperature, area, volume, speed, and more. Select your units, enter a value, get instant results.
Length Converter
Convert between meters, feet, inches, kilometers, and more
Weight Converter
Convert between kilograms, pounds, ounces, and more
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Area Converter
Convert between square meters, acres, hectares, and more
Volume Converter
Convert between liters, gallons, cups, and more
Speed Converter
Convert between km/h, mph, m/s, knots, and more
Density Converter
Convert between kg/m³, g/cm³, lb/ft³, and other density units
Pressure Converter
Convert between Pascal, atmosphere, bar, PSI, and more
Energy Converter
Convert between Joule, calorie, kilowatt-hour, BTU, and more
Power Converter
Convert between Watt, kilowatt, horsepower, and other power units
Digital Storage Converter
Convert between Byte, KB, MB, GB, TB, and PB
Frequency Converter
Convert between Hz, kHz, MHz, GHz, and other frequency units
Angle Converter
Convert between degrees, radians, and gradians
Fuel Efficiency Converter
Convert between MPG, KMPL, L/100km, and other fuel efficiency units
Time Unit Converter
Convert between seconds, minutes, hours, days, and years
Torque Converter
Convert between Newton-meter, pound-foot, and other torque units
Unit Converters — Fast, Accurate, Browser-Only
Whether you're reading a recipe from another country, helping a child with homework, checking specs on a datasheet, or just converting kilometres to miles for a road trip, our unit converters give you the answer in one step. Every converter uses internationally standardised ratios (the 1959 international definitions for imperial units, SI for metric).
Common Daily Conversions
Start with length (metres, feet, inches, miles, kilometres), weight/mass (kg, lb, oz, tons), temperature (°C ↔ °F ↔ K), and speed (km/h, mph, m/s, knots).
Area & Volume
Real estate and land measurements need the area converter (square feet, square metres, acres, hectares, gunta/bigha for Indian use). For liquids and capacity, the volume converter handles litres, gallons (US & UK), millilitres, cubic metres, and more.
Physics & Engineering
For technical work, use the energy, power, pressure, frequency, density, torque, and angle converters.
Tech & Time
Developers and IT users will want the digital storage converter (bytes, KB, MB, GB, TB — base 10 and base 2), the time unit converter (seconds to years), and the fuel efficiency converter (mpg ↔ km/L ↔ L/100km).
How Our Converters Stay Accurate
- International inch = 25.4 mm exactly (1959 convention).
- Metric prefixes follow SI (kilo = 1,000, mega = 10⁶, etc.).
- Digital storage offers both decimal (MB = 10⁶ B) and binary (MiB = 2²⁰ B) views.
- Temperature conversions use the precise K = °C + 273.15 relationship.
Related Categories
Need calculations instead? Try our daily tools or finance calculators.