Converters
Free online converters for length, weight, temperature and data storage. Accurate, instant and free.
Convert units across length, weight, temperature and data storage instantly. The converters use standard conversion factors, so results are exact for every unit pair they support.
Length Converter
Free length converter for mm, cm, m, km, inches, feet, yards and miles. Accurate instant conversions, no sign-up.
Weight Converter
Free weight and mass converter for grams, kilograms, pounds, ounces, stones and more. Instant and accurate, right in your browser.
Temperature Converter
Free temperature converter between Celsius, Fahrenheit and Kelvin. Convert cooking, weather and science temperatures instantly.
Data Storage Converter
Free data storage converter between bytes, KB, MB, GB, TB and PB. Switch between binary (1024) and decimal (1000) bases.
Time Converter
Free time unit converter. Convert seconds, minutes, hours, days, weeks, months and years to each other.
Frequently asked questions
Why does 0 degrees Celsius equal 32 Fahrenheit?
The two scales start at different reference points. The formula is F = C x 9/5 + 32, so the freezing point of water (0 C) maps to 32 F.
What is the difference between a megabyte and a megabit?
A megabyte is 8 megabits. Internet speeds are usually quoted in megabits per second, while storage is quoted in megabytes - a 100 Mbps line downloads about 12.5 MB per second.
Are conversions rounded?
Results show a sensible number of significant digits, but full precision is kept internally. For scientific work, verify the last digit against your own requirements.