Unit Converters
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Convert any everyday unit as you type. Length, weight, volume, speed, time, temperature, area, data storage, pressure, fuel economy and energy are covered, plus a height converter and a weight-to-volume tool for questions like how many liters are in a kilogram. Every page shows the exact factor, the formula and a conversion table you can use offline.
Browse unit converters
- Time Zone ConverterConvert between any two zones, DST included.
- EST to IST ConverterPlan calls from New York to India using the event date, daylight-saving offsets and day changes.
- IST to EST ConverterPlan calls from India to New York using the event date, daylight-saving offsets and day changes.
- PST to IST ConverterPlan calls from Los Angeles to India using the event date, daylight-saving offsets and day changes.
- CST to IST ConverterPlan calls from Chicago to India using the event date, daylight-saving offsets and day changes.
- BST to IST ConverterPlan calls from London to India using the event date, daylight-saving offsets and day changes.
- GMT to IST ConverterPlan calls from GMT to India using the event date, daylight-saving offsets and day changes.
- Unit ConverterEvery everyday unit in one tool, with the formula shown.
- Length Convertermm, cm, m, km, inches, feet, yards, miles and gaj.
- Weight Converterkg, grams, pounds, ounces, stone, tons and newtons.
- Volume ConverterLiters, mL, gallons, cups, fluid ounces and more.
- Speed Convertermph, km/h, m/s, knots and running pace.
- Time ConverterSeconds, minutes, hours, days, weeks, months and years.
- Temperature ConverterCelsius, Fahrenheit and Kelvin with the formulas.
- Area Convertersq ft, sq m, acres, hectares, gaj, cent and more.
- Data Storage ConverterBytes, KB, MB, GB, TB and the binary units.
- Pressure Converterpsi, bar, kPa, atm, mmHg and kgf/cm².
- Fuel Economy Convertermpg (US and UK), L/100 km and km/L.
- Energy ConverterCalories, kJ, joules, kWh and BTU.
- Height Converter (Feet, Inches to cm)5 ft 8 in to cm and back, with a height chart.
- Kg to Liter Converter1 kg of water = 1 L. Other liquids by density.
- Liter to Kg Converter1 L of water = 1 kg. Other liquids by density.
- Gallon to Kg ConverterA US gallon of water weighs 3.785 kg (8.34 lb).
- Miles to Kilometers ConverterConvert miles to kilometers for journey lengths and route distances.
- Kilometers to Miles ConverterConvert kilometers to miles for journey lengths and route distances.
- Miles to Feet ConverterConvert miles to feet for journey lengths and route distances.
- Miles to Meters ConverterConvert miles to meters for journey lengths and route distances.
- Feet to Meters ConverterConvert feet to meters for dimensions and everyday measurements.
- Meters to Feet ConverterConvert meters to feet for dimensions and everyday measurements.
- Feet to Centimeters ConverterConvert feet to centimeters for dimensions and everyday measurements.
- Centimeters to Feet ConverterConvert centimeters to feet for dimensions and everyday measurements.
- Feet to Millimeters ConverterConvert feet to millimeters for fittings, screen sizes and precise dimensions.
- Feet to Inches ConverterConvert feet to inches for fittings, screen sizes and precise dimensions.
- Inches to Feet ConverterConvert inches to feet for fittings, screen sizes and precise dimensions.
- Millimeters to Inches ConverterConvert millimeters to inches for fittings, screen sizes and precise dimensions.
- Inches to Millimeters ConverterConvert inches to millimeters for fittings, screen sizes and precise dimensions.
- Inches to Centimeters ConverterConvert inches to centimeters for fittings, screen sizes and precise dimensions.
- Centimeters to Inches ConverterConvert centimeters to inches for fittings, screen sizes and precise dimensions.
- Feet to Gaj ConverterConvert feet to gaj for linear measurements; square gaj is an area unit.
- Yards to Meters ConverterConvert yards to meters for dimensions and everyday measurements.
- Kilograms to Pounds ConverterConvert kilograms to pounds for package weights and mass measurements.
- Pounds to Kilograms ConverterConvert pounds to kilograms for package weights and mass measurements.
- Kilograms to Grams ConverterConvert kilograms to grams for ingredient weights and small masses.
- Kilograms to Metric tons ConverterConvert kilograms to metric tons with metric, US short and UK long tons kept distinct.
- Kilograms to Newtons ConverterConvert kilograms to newtons using standard gravity to relate mass to weight force.
- Ounces to Grams ConverterConvert ounces to grams for ingredient weights and small masses.
- Stones to Kilograms ConverterConvert stones to kilograms to compare body-weight records in different units.
- US gallons to Liters ConverterConvert US gallons to liters with US and imperial gallon sizes clearly distinguished.
- Liters to US gallons ConverterConvert liters to US gallons with US and imperial gallon sizes clearly distinguished.
- Milliliters to US fluid ounces ConverterConvert milliliters to US fluid ounces using US recipe measures, not ingredient weights.
- US fluid ounces to Milliliters ConverterConvert US fluid ounces to milliliters using US recipe measures, not ingredient weights.
- US cups to Milliliters ConverterConvert US cups to milliliters using US recipe measures, not ingredient weights.
- Liters to Milliliters ConverterConvert liters to milliliters for liquid quantities and container sizes.
- Miles per hour to Kilometers per hour ConverterConvert miles per hour to kilometers per hour to compare road speeds across unit systems.
- Kilometers per hour to Miles per hour ConverterConvert kilometers per hour to miles per hour to compare road speeds across unit systems.
- Celsius to Fahrenheit ConverterConvert degrees Celsius to degrees Fahrenheit for weather, cooking and temperature readings.
- Fahrenheit to Celsius ConverterConvert degrees Fahrenheit to degrees Celsius for weather, cooking and temperature readings.
- Square feet to Square meters ConverterConvert square feet to square meters for floor plans and land measurements.
- Square meters to Square feet ConverterConvert square meters to square feet for floor plans and land measurements.
- Acres to Square feet ConverterConvert acres to square feet for floor plans and land measurements.
- Square gaj to Square feet ConverterConvert square gaj to square feet for floor plans and land measurements.
- Hectares to Acres ConverterConvert hectares to acres for floor plans and land measurements.
- Megabytes to Gigabytes ConverterConvert megabytes to gigabytes using decimal storage units (1,000 per step).
- Gigabytes to Megabytes ConverterConvert gigabytes to megabytes using decimal storage units (1,000 per step).
- Psi to Bar ConverterConvert psi to bar for tyre gauges and equipment specifications.
- Bar to Psi ConverterConvert bar to psi for tyre gauges and equipment specifications.
- Hours to Minutes ConverterConvert hours to minutes for durations, timesheets and elapsed-time totals.
- Minutes to Hours ConverterConvert minutes to hours for durations, timesheets and elapsed-time totals.
- Binary to Text TranslatorTranslate binary bytes to text or encode text as UTF-8 binary.
How these converters work
Each unit is stored as an exact factor to a base unit (the meter, the kilogram, the liter, the second), and a conversion is a multiply and a divide, so results are as precise as the definitions themselves. The inch, foot, yard, mile, pound and gallon all have exact metric definitions, so 1 mile is exactly 1.609344 km and 1 pound is exactly 0.45359237 kg. Temperature is the exception because its scales have different zero points, so the converter applies the offset as well as the ratio.
Some popular searches mix two different kinds of unit. Kilograms to liters depends on the density of the substance, so that page lets you pick water, milk, oil, petrol and others. Feet to square feet needs a width as well as a length, which the area converter handles.
Frequently asked questions
Which spelling do you use, meter or metre?
The pages use meter and liter (the US spelling) in headings, and the converters accept either. Metre, litre, kilometre and centimetre are the same units with the British spelling, and the factors are identical.
Are the conversion factors exact?
Yes for units with a formal definition: the international inch (25.4 mm), foot (0.3048 m), pound (0.45359237 kg), US gallon (3.785411784 L) and imperial gallon (4.54609 L). Results are rounded to eight significant digits for display, which is more than enough for any everyday use.
Why does kg to liters need a substance?
Kilograms measure mass and liters measure volume, so the answer depends on how dense the material is. One kilogram of water is exactly one liter, but a kilogram of cooking oil is about 1.09 liters and a kilogram of honey is only about 0.7 liters. The kg to liter converter includes a density list for common liquids and dry goods.