Measurements
Free tools from the Measurements group.
Length
au to kmConvert astronomical units to kilometers. 1 au is exactly 149,597,870.7 km, and the tables give planet distances from JPL and scale model ratios.
cm to dmConvert centimeters to decimeters. Ten centimeters make one decimeter. Ready-made tables, everyday object sizes and a spreadsheet formula.
cm to ftConvert centimetres to feet and inches. Height table by the centimetre, older feet compared, spreadsheet formula.
cm to inConvert centimeters to inches. Height, clothing sizes, TV screen size, luggage dimensions.
cm to kmConvert centimeters to kilometers. Read distance off a map scale, scientific notation, ready-made tables and a spreadsheet formula.
cm to mConvert centimetres to metres. Ready-made table, everyday dimensions and what one centimetre means at scale 1:100.
cm to mmConvert centimetres to millimetres. Ready-made table, ring sizes for the UK and the US, and how to measure a finger.
cm to ydConvert centimeters to yards and read the result in yards and inches too. A table with the inch notation, old length measures and a spreadsheet formula.
dm to cmConvert decimeters to centimeters. A decimeter is 10 centimeters. Ready-made tables, the metric ladder and the places the decimetre is really used.
dm to kmConvert decimeters to kilometers. Ten thousand decimeters make one kilometer. Ready-made tables, the result in kilometres and metres, and a formula.
dm to metersConvert decimeters to meters. Ten decimeters make one meter, so 77.8 dm comes to 7.78 m. Ready-made table of values and a spreadsheet formula.
dm to mmConvert decimeters to millimeters. A decimeter is 100 millimeters, so 3.5 dm is 350 mm. A table of values and the building module that equals one decimeter.
ft to cmConvert feet to centimetres. The field takes feet with inches, plus a height table and sizes still quoted in feet.
ft to inConvert feet to inches. Height in feet and inches to total inches, height table, full conversion table.
ft to kmConvert feet to kilometres: 35,000 ft is 10.668 km. The tables cover flight levels, airliner ceilings, US peaks and values from 1 to 1,000,000 feet.
ft to mConvert feet to meters. Height in feet and inches, aviation altitude, full conversion table.
ft to miConvert feet to statute and nautical miles. Ready-made table, cruising altitudes and the spreadsheet formula.
ft to mmConvert feet to millimetres. The feet-and-inches notation, sheet and container sizes, tables and the spreadsheet formula.
ft to ydConvert feet to yards and read the answer in whole yards with the feet left over. The tables cover field dimensions and the whole imperial system.
furlongs to miConvert furlongs to miles and read the answer as 1 mi 4 fur. The switch covers the statute and nautical mile, and the tables give race distances.
in to cmConvert inches to centimeters. TV size, height in metric, clothing sizes, luggage.
in to ftConvert inches to feet. Height in feet and inches, height table, full conversion table.
in to mConvert inches to meters. Screen and material sizes given in inches, a table with feet and a spreadsheet formula.
in to mmConvert inches to millimeters. Drill bits, bolts, socket wrenches, full inch fraction table.
in to ydConvert inches to yards by dividing by 36. The result also shows as yards and inches, and a table rounds fabric lengths up to the next eighth of a yard.
km to auConvert kilometers to astronomical units. Results keep at least ten significant digits, and a table gives the perihelion of Earth and the Parker Solar Probe record.
km to cmConvert kilometers to centimeters. Scientific notation, OS and USGS map scales, ready-made tables and a spreadsheet formula.
km to dmConvert kilometers to decimeters. A kilometer is 10,000 decimeters. Ready-made tables, the result in scientific notation and the full metric ladder.
km to ftA kilometre is 3,280.84 feet. Convert kilometres to feet and find Ben Nevis, Everest, the tropopause and the edge of space in feet in the tables.
km to light yearsConvert kilometers to light-years. Type the distance in digits, in scientific notation or as 25 billion, and the result keeps ten significant digits.
km to mConvert kilometers to meters. Running distances, how to read a driver location sign, ready-made tables and a spreadsheet formula.
km to miConvert kilometers to miles. Running and marathon, speed (km/h to mph), trips to the US and UK.
km to mmConvert kilometers to millimeters. One million millimeters per kilometer, the metric ladder, running distances and a spreadsheet formula.
km to ydA kilometre is 1,093.6133 yards. Convert kilometres to yards and find road race distances, pool lengths and one lap of the track in the tables.
light years to kmConvert light-years to kilometers. One light-year is exactly 9,460,730,472,580.8 km, and the field takes scientific notation and words like million.
m to cmConvert metres to centimetres. Ready-made table, roll-goods widths and every metric unit from millimetre to kilometre.
m to ftConvert meters to feet. Height in feet and inches, room and equipment sizes, full conversion table.
m to inConvert meters to inches. A table with feet and inches, everyday metric sizes and a spreadsheet formula.
m to kmConvert meters to kilometers. Track and pool distances, ready-made tables and a spreadsheet formula.
m to miConvert meters to statute and nautical miles. Track distances, well-known heights, ready-made tables and a spreadsheet formula.
m to mmConvert meters to millimeters. A 79-row table, fractions of a meter, laser measure accuracy and SketchUp unit settings.
m to ydConvert meters to yards. Pitch dimensions, pool lengths, ready-made tables and a spreadsheet formula.
meters to dmConvert meters to decimeters. One meter holds ten decimeters, so 1.74 m comes to 17.4 dm. Table of values and a spreadsheet formula with a prefix.
mi to ftConvert statute and nautical miles to feet. Ready-made table, race distances and the spreadsheet formula.
mi to furlongsConvert miles to furlongs, including from the 1 mi 4 fur form. The switch covers the statute and nautical mile, and the tables give fractions of a mile.
mi to kmConvert miles to kilometers. Running and marathon, speed limits (mph to km/h), travel, nautical miles.
mi to mConvert statute and nautical miles to meters. Quarter and half miles, race distances, ready-made tables and a spreadsheet formula.
mi to ydConvert miles to yards, including the 26 mi 385 yd form. The switch covers the statute and nautical mile, and the tables give track and field distances.
mm to cmConvert millimetres to centimetres. Ready-made table, a which-is-bigger comparison and how to read a ruler.
mm to dmConvert millimeters to decimeters. One hundred millimeters make a decimeter, so 450 mm is 4.5 dm. A table of values and rainfall in millimeters as decimeters of water.
mm to ftConvert millimetres to feet and to the feet-and-inches notation. Building dimensions, ready-made tables and the formula.
mm to inConvert millimeters to inches. Drill bits, bolts, material thickness, inch fraction table.
mm to kmConvert millimeters to kilometers. Decimal, fraction and scientific notation, dimensions from technical drawings and a spreadsheet formula.
mm to mConvert millimeters to meters. Drawing dimensions, sheet formats, a 75-row table and unit settings for AutoCAD and Blender.
mm to nmConvert millimeters to nanometers. A millimeter equals one million nanometers, and the tables give optical disc track pitch and diffraction grating line spacing.
mm to ydConvert millimeters to yards by dividing by 914.4. You can also read the result in yards and inches, and the table covers round metric lengths.
mm to µmConvert millimeters to microns. A millimeter holds 1000 microns, and the tables cover fractions of a millimeter, foil thickness and thousandths of an inch.
nm to mmConvert nanometers to millimeters. A nanometer is one millionth of a millimeter, and a table gives laser wavelengths in both units.
yd to cmConvert yards to centimeters by multiplying by 91.44. The tables cover the fractions fabric is sold in and the old cloth subdivisions.
yd to ftConvert yards to feet by multiplying by three. The tables give yard fractions in feet and inches, plus the dimensions of an American football field.
yd to inConvert yards to inches by multiplying by 36. The field accepts 2 yd 18 in, and the tables list yard fractions and fabric cuts measured in inches.
yd to kmConvert yards to kilometres by multiplying by 0.0009144. The tables cover golf courses, pool distances and the track limits written in yards.
yd to mConvert yards to meters. Sporting distances, fabric by the yard, ready-made tables and a spreadsheet formula.
yd to miConvert yards to miles and read the answer as whole miles with the yards left over. The tables cover field, track and pool distances.
yd to mmConvert yards to millimeters by multiplying by 914.4. The tables cover the fractions of a yard and the yard variants with their millimeter values.
µm to mmConvert microns to millimeters. A micron, formally a micrometer, is 0.001 mm, and the tables give the thickness of hair, PM10 dust and wool fibre.
Weight
carats to gConvert carats to grams. Stone weights in grams, milligrams and points, plus gold karat marks.
dg to kgConvert decigrams to kilograms and see where the decigram sits among the metric units.
g to caratsConvert grams to carats. Fractions of a gram, pearl trade units and the step of a jeweller’s scale.
g to grainsConvert grams to grains. Decimal grams, a pearl-grain switch, and English and jewellery units in grains.
g to kgConvert grams to kilograms. Shopping, parcels and nutrition labels.
g to lbConvert grams to pounds. Results in pounds and ounces, birth weights, package sizes and a 500 g pound switch.
g to mcgConvert grams to micrograms. Fractions of a gram, lab balance readings and scientific notation in the field.
g to mgConvert grams to milligrams. Decimal grams, every unit of mass and sodium in salt.
g to ozConvert grams to avoirdupois and troy ounces. Recipes, parcels and precious metals.
g to tConvert grams to tons. Pick metric, short or long tons and see how many items of a given weight add up to one ton.
grains to gConvert grains to grams. Bullet and arrow weights, a pearl-grain switch and the grain in older systems of measurement.
kg to dgConvert kilograms to decigrams, the tenths of a gram.
kg to gConvert kilograms to grams. Recipes, kitchen scales and nutrition labels.
kg to lbConvert kilograms to pounds. Body weight, gym loads, baggage limits and newborn weight.
kg to mcgOne kilogram is one billion micrograms. Convert kilograms to mcg, with a table of 24 values and the kilogram, gram, milligram, mcg ladder.
kg to mgConvert kilograms to milligrams. Body and portion masses, scientific notation and mg/kg rates.
kg to ozConvert kilograms to ounces. A kilo is 35.27 ounces, and a kilo bar of gold or silver is 32.15 troy ounces.
kg to stConvert kilograms to stones and pounds in the British body-weight notation.
kg to tConvert kilograms to tons. Pick metric, short or long tons and read the loads that shipping papers give in kilograms.
lb to gConvert pounds to grams. Pounds and ounces, fractions of a pound, US labels and a 500 g pound switch.
lb to kgConvert pounds to kilograms. Body weight from US apps, gym programs and baggage limits.
lb to ozConvert pounds to ounces. Baby weight in pounds and ounces, conversion table and the exact formula.
lb to stConvert pounds to stones and read the weight as 12 st 12 lb, the way the UK and Ireland write it.
lb to tConvert pounds to tons. Short, long and metric tons side by side, plus the federal weight limits and vehicle classes.
mcg to gConvert micrograms to grams. Results in scientific notation, units from nanogram to kilogram and 2.5E+03 in the field.
mcg to kgOne microgram is 0.000000001 kg. Convert micrograms to kilograms, with a table of 24 values and the mcg, µg and ug spellings side by side.
mcg to mgConvert micrograms to milligrams. Label values in mcg, the µg symbol and the ug code a spreadsheet uses.
mg to gConvert milligrams to grams. Label values, servings per gram and micrograms.
mg to kgConvert milligrams to kilograms. Label doses, scientific notation and mg/kg concentrations.
mg to mcgConvert milligrams to micrograms. Fractions of a milligram, the µg, mcg and ug notations and the leading zero.
mg to ozConvert milligrams to ounces. Supplement label doses, the metric carat and a switch for the troy ounce.
oz to gConvert ounces to grams. American pack sizes, boxing gloves and the troy ounce.
oz to kgConvert ounces to kilograms. Enter avoirdupois ounces from a label or troy ounces from a gold quote and read the kilos.
oz to lbConvert ounces to pounds. Result as pounds and ounces, baby weight and a conversion table.
oz to mgConvert ounces to milligrams. A switch for the avoirdupois and troy ounce, label doses and the jeweller’s carat.
oz to tConvert ounces to tons. Enter the millions of ounces from a mining report and read the tons, troy ounces included.
st to kgConvert stones and pounds to kilograms, including the 11 st 4 lb notation.
st to lbConvert stones to pounds. One stone is 14 pounds, and the table also gives the stone-and-pounds notation.
t to gConvert tons to grams. Metric, short and long tons in one switch, with all three side by side in the table.
t to kgConvert tons to kilograms. Metric, short and long tons in one switch, with all three side by side in the table.
t to lbConvert tons to pounds. Short, long and metric tons side by side, plus the weights allowed on foreign roads.
t to ozConvert tons to ounces. Separate switches for the ton and the ounce, so gold lands in troy ounces.
Volume
barrels to gallonsConvert barrels to gallons. Pick an oil or beer barrel and a US or imperial gallon.
barrels to lConvert barrels to litres. An oil barrel is 158.987 litres, and beer barrels differ between the US and the UK.
centilitres to lConvert centilitres to litres. A centilitre is 0.01 litre, or 10 millilitres, with bottle and can sizes in a table.
centilitres to mlConvert centilitres to millilitres. A centilitre is 10 millilitres, with bottle sizes and bar measures in a table.
cl to ozConvert centilitres to fluid ounces. US or UK ounce switch, bottle sizes and bar measures.
cups to gallonsConvert cups to gallons. Sixteen cups make one US gallon, and the switcher adds the dry gallon and the imperial one.
cups to lConvert cups to litres. One US cup is 0.2366 l, and four metric cups make exactly one litre.
cups to mlConvert US cups to millilitres. The field takes fractions like 3/4, plus a 55-row table and tablespoon counts.
cups to ouncesConvert cups from an American recipe to fluid ounces. One US cup is exactly 8 fl oz, and the switcher adds the labelling and metric cups.
cups to pintsConvert cups to pints. Two cups make one US liquid pint, and the switcher adds the dry pint and the imperial pint.
deciliters to mlConvert decilitres to millilitres. One decilitre is 100 ml, with a table from 0.05 dl and tablespoon equivalents.
decilitres to lConvert decilitres to litres. A decilitre is 0.1 litre, that is 100 millilitres, with a ready table.
drops to mlConvert drops to millilitres. The field counts the pharmacopoeia drop of 0.05 ml, so 20 drops of water make 1 ml.
gallons to barrelsConvert gallons to barrels. Pick a US or imperial gallon and an oil or beer barrel.
gallons to cupsConvert gallons to cups. A US gallon holds exactly sixteen cups, and the switcher adds the dry gallon and the imperial one.
gallons to lConvert gallons to litres. US or UK gallon switch, fuel tanks, aquariums and drums.
gallons to mlConvert gallons to millilitres. The selector covers the US, imperial and US dry gallon.
gallons to pintsConvert gallons to pints. A gallon holds eight pints in US and imperial measure alike, so the gallon count is multiplied by eight.
gallons to qtConvert gallons to quarts. One gallon holds four quarts in the US liquid, US dry and imperial systems alike.
l to barrelsConvert litres to barrels. 1,000 litres is 6.2898 barrels of oil, and the switch also covers beer barrels.
l to centilitresConvert litres to centilitres. One litre is 100 centilitres, with a table of values and a spreadsheet formula.
l to cupsConvert litres to cups. One litre is 4.2268 US cups and exactly 4 metric cups.
l to decilitresConvert litres to decilitres. One litre is 10 decilitres, with a ready table and a spreadsheet formula.
l to gallonsConvert litres to gallons. US or UK gallon switch, tank volumes, fuel economy and the oil barrel.
l to m³Convert litres to cubic metres. 1,000 litres make 1 m³, with a table, soil bags and liquid propane turned into gas.
l to mlConvert litres to millilitres. Tank and bottle sizes, a 51-row table and a spreadsheet formula.
l to pintsConvert litres to pints. One litre is 2.1134 US pints and 1.7598 imperial pints.
l to quartsConvert litres to quarts. One litre is 1.0567 US liquid quarts and 0.8799 imperial quarts.
m³ to lConvert cubic metres to litres. 1 m³ holds 1,000 litres, with a table, water meter readings and pool volumes.
ml to centilitresConvert millilitres to centilitres. 10 millilitres make 1 centilitre, with jug and label values in a table.
ml to cupsConvert millilitres to US cups from a recipe. Three cup sizes, an 83-row table and package capacities.
ml to decilitersConvert millilitres to decilitres. 100 ml is 1 dl, with a value table and label sizes shown in decilitres.
ml to dropsConvert millilitres to drops. 1 ml of water from a pharmacopoeia dropper makes 20 drops, and an oil makes more.
ml to gallonsConvert millilitres to gallons. A 750 ml bottle is 0.198129 of a US gallon.
ml to lConvert millilitres to litres. Container sizes, a 62-row table and a spreadsheet formula.
ml to ozConvert millilitres to fluid ounces. US or UK ounce switch, wine bottle, carry-on liquid limit.
ml to pintsConvert millilitres to pints. Bottle, can and pack sizes plus all three pint measures.
ml to quartsConvert millilitres to quarts. Can, bottle and carton sizes plus all three quart measures.
ml to tbspConvert millilitres to tablespoons. A switch sets the metric, US or Australian spoon, plus a 56-row table.
ml to tspConvert millilitres to teaspoons. 5 ml is one teaspoon and 2.5 ml is half of one, the dose a medicine label prints.
ounces to cupsConvert fluid ounces to cups. Eight fl oz make one US cup, and the switcher adds the labelling cup of 240 ml and the metric cup of 250 ml.
oz to clConvert fluid ounces to centilitres. US or UK ounce switch, cocktail recipes and US labels.
oz to mlConvert fluid ounces to millilitres. US or UK ounce switch, US cup, kitchen recipes.
pints to cupsConvert pints to cups. A US liquid pint is exactly two cups, and the switcher adds the dry pint and the imperial pint.
pints to gallonsConvert pints to gallons. The pint count is divided by eight, so 4 pints make half a gallon.
pints to lConvert pints to litres. A US pint is 0.4732 litres and an imperial pint 0.5683 litres.
pints to mlConvert pints to millilitres. The selector covers the US liquid, US dry and imperial pint.
pt to qtConvert pints to quarts. The pint count is halved, so 5 pints make 2.5 quarts.
qt to gallonsConvert quarts to gallons. Four quarts make one gallon, and the answer holds in every measuring system.
qt to ptConvert quarts to pints. One quart holds two pints in all three systems of measure, so the quart count doubles.
quarts to lConvert quarts to litres. The selector covers the US liquid, imperial and US dry quart.
quarts to mlConvert quarts to millilitres. The selector covers the US liquid, imperial and US dry quart.
tbsp to mlConvert tablespoons to millilitres. The field takes fractions like 1/2, and a switch sets the 15, 14.79 or 20 ml spoon.
tbsp to tspConvert tablespoons to teaspoons. The field takes fractions like 1/2, and a switch sets the three or four teaspoon spoon.
tsp to mlConvert teaspoons to millilitres. A teaspoon holds 5 ml, and the field takes fractions straight from the recipe.
tsp to tbspConvert teaspoons to tablespoons. The table gives the answer as a fraction too, so eight teaspoons read as two and two thirds.
Pressure
atm to psiConvert atmospheres to psi. One atmosphere is 14.6959 psi. The tables give diving depth in atmospheres and the atmosphere in other units.
psi to atmConvert psi to atmospheres. One psi is 0.068046 atmospheres. The tables give real air pressure with the WMO records and gauge readings in absolute atmospheres.
bar to psiConvert bar to psi. The tables give scuba cylinder, hydrogen refueling and espresso pressures, with the standard and technical atmosphere alongside.
psi to barConvert psi to bar. One table covers tires and 3,000 psi cylinders, another sets gauge psig against absolute psia.
kPa to psiConvert kilopascals to psi. The tables give tire pressure warning thresholds from UN Regulation No. 141 and MAP sensor readings as gauge psi.
psi to kPaConvert psi to kilopascals. A table gives tire pressures with the warning threshold from the US standard FMVSS 138, and the steps show a spreadsheet formula.
bar to kPaConvert bar to kilopascals. One table covers 58 values from 0.1 to 1,000 bar, another places the bar among the pascal, millibar, megapascal and atmosphere.
kPa to barConvert kilopascals to bar. One table covers 50 values from 1 to 10,000 kPa, another gives the water pressure required by building rules in four countries.