Quick answer: Free unit converters for length, weight, temperature, volume, speed, energy and more. Switch between metric and imperial instantly.
All Unit Converters (14)
Area Converter (m2, ft2, acres) →Area converter: convert square meters, square feet, acres, hectares, and square kilometers instantly. Free online tool with a full conversion table.Converters
Data Storage Converter (GB to MB, KB, TB) →Data storage converter: convert bits, bytes, KB, MB, GB, TB, and PB instantly. Free online tool with a full conversion table and precise results.Converters
Energy Converter (kWh, joules, kcal, BTU) →Free energy converter: convert kWh, joules, kcal, BTU and more instantly, with a full conversion table.Converters
Frequency Converter (Hz, kHz, MHz, GHz) →Free frequency converter: convert Hz, kHz, MHz, GHz and rpm instantly, with a full conversion table.Converters
Length Converter (m, ft, in, cm, km) →Free length converter: convert mm, cm, m, km, inches, feet, yards and miles instantly with a full table.Converters
Microliter to Milliliter Converter →Convert microliters to milliliters instantly. Free lab volume converter for µL, mL, liters and nanoliters — pipetting, dilutions & reagents.Converters
Power Converter (kW to hp, watts, BTU/h) →Free power converter: convert kW, watts, horsepower and BTU/h instantly, with a full conversion table.Converters
Pressure Converter (psi to bar, kPa, atm) →Free pressure converter: convert psi, bar, kPa, atm and mmHg instantly, with a full conversion table.Converters
Speed Converter (km/h to mph, m/s, knots) →Speed converter: convert km/h, mph, m/s, knots, and ft/s instantly. Free online tool with a full conversion table and precise, accurate results.Converters
Temperature Converter (C to F, K) →Free temperature converter: convert between Celsius, Fahrenheit and Kelvin instantly, all three shown.Converters
Time Converter →Free time converter: convert seconds, minutes, hours, days, weeks and years instantly with a full table.Converters
Unit Conversion (Microgram, Milligram etc.) →Converters
Volume Converter (litres to gallons) →Free volume converter: convert litres, gallons, cups, ml, fl oz and more instantly with a full table.Converters
Weight Converter (kg to lb, oz, g) →Free weight converter: convert kg, lb, g, oz, stone and tonnes instantly, with a full conversion table.Converters
Frequently asked questions
Are these unit converters free?
Yes, all converters are free with no sign-up.
Which units can I convert?
Length, weight, temperature, volume, area, speed, time, energy, power, pressure, frequency, data storage and more.
How accurate are the conversions?
All converters use exact defined conversion factors, so results are precise.
Do they work offline?
No, an internet connection is needed to load the page, but conversion itself is instant.