21 tools on this shelf
Converters
Convert units, number bases, timestamps, and formats: length, weight, temperature, data size, and more.
Length ConverterConvert between meters, kilometers, miles, feet, inches, yards, and more — instantly and accurately.Weight ConverterConvert kilograms, grams, pounds, ounces, stones, and metric tons with exact conversion factors.Temperature ConverterConvert between Celsius, Fahrenheit, and Kelvin instantly with the standard formulas.Data Size ConverterConvert bits, bytes, KB, MB, GB, TB — including binary units KiB, MiB, GiB — with both 1000 and 1024 factors.Speed ConverterConvert km/h, mph, m/s, knots, and ft/s instantly — handy for driving, aviation, and sports.Area ConverterConvert square meters, square feet, acres, hectares, and more for real estate, land, and construction.Volume ConverterConvert liters, gallons, cups, milliliters, fluid ounces, and more — perfect for cooking and chemistry.Time Unit ConverterConvert milliseconds, seconds, minutes, hours, days, weeks, months, and years.Number Base ConverterConvert numbers between binary, octal, decimal, and hexadecimal — supports arbitrarily large integers.Roman Numeral ConverterConvert numbers to Roman numerals and back — supports values from 1 to 3999 with instant validation.Number to Words ConverterSpell out any number in English words — plain text, US dollar amounts, or check-writing format.ISBN Validator & ConverterValidate any ISBN's check digit and convert between ISBN-10 and ISBN-13 formats instantly.VIN DecoderDecode a 17-character VIN: validate the check digit, find the model year, country, and manufacturer — free.Unix Timestamp ConverterConvert Unix timestamps to human-readable dates and back. Supports seconds and milliseconds, UTC and local time.Pressure ConverterConvert psi, bar, kPa, atmospheres, and mmHg — for tyres, gauges, weather, and blood pressure readings.Power ConverterConvert kilowatts, horsepower, metric PS, and BTU per hour — for engines, motors, and air conditioners.Energy ConverterConvert joules, kilowatt-hours, calories, kilocalories, and BTU — for electricity bills, food, and physics.Angle ConverterConvert degrees, radians, gradians, arcminutes, arcseconds, and turns — for maths, CSS, and surveying.Frequency ConverterConvert Hz, kHz, MHz, GHz, rpm, BPM, and rad/s — for audio, radio, engines, and screen refresh rates.Fuel Economy ConverterConvert MPG to L/100km and back, including imperial MPG and km per liter — with the inverse maths handled.Data Transfer Rate ConverterConvert Mbps to MB/s and back — the eight-to-one gap between the speed you buy and the speed you see.