Unit Converter
Convert between common units across engineering, science, and daily life. Includes length, weight, temperature, volume, area, speed, time, data, pressure, energy, and power.
Convert common units across engineering, science, and everyday use.
Why use this converter?
- Popular categories: Length, Weight, Temperature, Volume, Area, Speed, Time, Data, Pressure, Energy, Power
- Precision: Up to 8 decimals with automatic scientific notation when appropriate
- Privacy: All calculations happen locally in your browser
- Accessible: Keyboard-friendly and mobile responsive
Popular Unit Conversions
Length
- cm to inches, inches to cm
- feet to meters, meters to feet
- km to miles, miles to km
Weight
- kg to lbs, lbs to kg
- ounces to grams, grams to ounces
- stone to kg
Temperature
- Celsius to Fahrenheit
- Fahrenheit to Celsius
- Celsius/Fahrenheit to Kelvin
Volume & Area
- liters to gallons, gallons to liters
- cups to ml, tbsp to tsp
- sq ft to sq m, acres to hectares
Speed & Time
- mph to kph, kph to m/s
- seconds to minutes, hours to days
Data, Energy, Power
- MB to GB, GB to TB (binary base)
- kWh to J, Wh to kWh
- W to kW, kW to horsepower
Unit Converter FAQs
How accurate are the conversions?
We use standard SI definitions and widely accepted conversion factors. Results are shown with up to 8 decimal places or scientific notation for very large/small values.
Do you support Celsius, Fahrenheit, and Kelvin?
Yes. Temperature conversions are handled via Kelvin internally to ensure correctness when converting between Celsius, Fahrenheit, and Kelvin.
Does this work offline and is my data private?
All calculations happen locally in your browser. No data leaves your device. The page also works offline once cached by your browser.
What about decimal separators and locales?
Input expects standard dot decimals (e.g., 3.14). Output is formatted using your locale for readability while keeping precision.