Unit Converters

Convert between metric, imperial and engineering units for length, area, volume, weight, temperature, speed, pressure, energy, power, electric charge, frequency and digital storage.

545 free tools in 13 subcategories

Area Converters (16) Convert land and surface measurements between square meters, square feet, square yards, square inches, square centimeters, square kilometers, square miles, acres, and hectares. Density Converters (54) Convert density between kilograms per cubic meter, grams per cubic centimeter, pounds per cubic foot, pounds per cubic inch, pounds per cubic yard, pounds per US gallon, pounds per imperial gallon and slugs per cubic foot. Data Storage and Transfer Rate Converters (41) Convert digital storage units from bytes to petabytes using both decimal (1000) and binary (1024) standards, and data transfer rates between bits and bytes per second. Electric Charge Converters (34) Convert electric charge between coulombs, SI prefixes, elementary charges, ampere-hours, and additional electromagnetic charge units. Energy Converters (40) Convert energy between joules, megajoules, gigajoules, kilowatt-hours, megawatt-hours, BTU, calories, kilocalories, and electronvolt units from eV to TeV. Frequency Converters (50) Convert frequency, angular frequency, rotational speed, cycles per time, and the period of repeating signals. Length Converters (70) Convert between metric and imperial length units, including meters, feet, inches, miles, nautical miles, fathoms, furlongs, light years, and astronomical units. Power Converters (60) Convert power units between microwatts, milliwatts, watts, kilowatts, megawatts, gigawatts, horsepower, BTU per hour, kilocalories per hour, dBm, dBW, and tons of refrigeration. Pressure Converters (18) Convert pressure readings between bar, kilopascals, PSI, standard atmospheres, inches of mercury and millimeters of mercury for tyres, boilers, compressors, weather and blood pressure data. Speed Converters (22) Convert speeds between feet per second, meters per second, kilometers per hour, miles per hour, and knots. Temperature Converters (28) Convert temperature values between Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, Newton, and Delisle scales. Volume Converters (36) Convert volumes between liters, milliliters, US and imperial gallons, US quarts, pints, tablespoons and teaspoons, Imperial pints and fluid ounces, US fluid ounces, US cups, cubic meters, cubic feet, cubic yards, cubic inches and cubic centimeters for cooking, fuel, travel and engine sizes. Weight Converters (76) Convert weight and mass between nanograms, micrograms, milligrams, grams, kilograms, ounces, pennyweights, pounds, stones, carats, grains, slugs, troy ounces, and metric, US short, or Imperial long tons.
Gigahertz To Kilohertz Converter Free online gigahertz to kilohertz converter. Convert GHz to kHz instantly with the correct frequency formula and units. Watts To dBW Converter Free online Watts To dBW Converter. Convert positive power in watts to decibel-watts using the 1 W reference, with a conversion formula, table, and live results. Gigawatts To Watts Converter Free online Gigawatts To Watts Converter. Convert power from gigawatts to watts with conversion formula, reference table, and live results. Reaumur To Fahrenheit Converter Convert temperature from Reaumur (°Re) to Fahrenheit (°F), with absolute-zero validation and instant results. Metric Tons To Grams Converter Free online Metric Tons To Grams Converter. Convert metric tons to grams with a reference table and instant calculation. Yards To Centimeters Converter Convert international yards to centimeters using the exact relationship 1 yard = 91.44 centimeters. US Quarts To Liters Converter Convert US liquid quarts to liters using 1 US qt = 0.946352946 L, with instant results. Kilowatt Hours To Gigajoules Converter Convert kilowatt-hours to gigajoules using 1 kWh = 0.0036 GJ.
Math Tools Calculators for arithmetic, trigonometry, number bases and checksums, built for students, engineers and developers. Everyday Tools Quick helpers for daily life: calculate discounts, keep a tally with a click counter, or let chance make a yes-or-no decision.