Convert lengths, areas, volumes, weights, and more.
Convert between degrees, radians, percent slope, and ratio (run:rise). Useful for roof pitches, ramps, and grading.
Open →Convert area between metric and imperial units: square metres, square feet, square inches, acres, and hectares.
Open →Convert energy between joules, kilojoules, kilowatt-hours, kilocalories, and BTU. Exact factors for engineering and cooking contexts.
Open →Convert fractional inches to decimals and millimetres, and millimetres back to the nearest 1/8, 1/16, 1/32, or 1/64 inch.
Open →Convert lengths between metric and imperial units: metres, centimetres, millimetres, kilometres, inches, feet, yards, miles.
Open →Convert power between watts, kilowatts, megawatts, horsepower, and BTU/h. Useful for engines, heaters, and appliances.
Open →Convert pressure between bar, PSI, pascal, kilopascal, megapascal, atmosphere, and mmHg using exact conversion factors.
Open →Convert speed between metric and imperial units: kilometres per hour, mph, metres per second, knots, and feet per second.
Open →Convert temperature between Celsius (°C), Fahrenheit (°F), and Kelvin (K). Exact formulas, instant conversion.
Open →Convert torque between newton metres, foot-pounds, inch-pounds and kgf·m, with the remaining units shown alongside. Includes typical tightening torques.
Open →Convert volume between metric and imperial units: litres, millilitres, cubic metres, cubic feet, US and UK gallons, quarts, and pints.
Open →Convert weight and mass between metric and imperial units: kilograms, grams, pounds, ounces, metric tons, and US short tons.
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