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| x name | x image | x Canonical Abbreviation | x Dimension | x Abbreviation(s) | x article |
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| x Gallon (US) |
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gal | Volume | gal |
A gallon is a measure of volume of approximately four litres. Historically it has had many different definitions, but there are three definitions in current use. These are the U.S. liquid gallon (≈ 3.8 L) and the lesser used U.S. dry gallon (≈ 4.4 L...
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| x Liter | L | Volume | L |
The litre or liter (see spelling differences) is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case (l and L). The lower case L is also often written as a cursive ℓ, though this symbol has no official...
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| x Pint (US) |
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pt | Volume | pt |
The pint is an English unit of volume or capacity in the imperial system and United States customary units. The imperial version is 20 imperial fluid ounces and is equivalent to about 568 ml, while the U.S. version is 16 U.S. fluid ounces and is...
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| x Quart (US) | qt | Volume | qt |
The quart is an imperial and US customary unit of volume equal to a quarter of a gallon, two pints, or four cups. Since gallons of various sizes have historically been in use, quarts of various sizes have also existed. Three of these quarts remain...
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| x Fluid ounce (US) | fl oz | Volume | fl. oz. |
A fluid ounce (abbreviated fl oz, fl. oz. or oz. fl.) is a unit of volume equal to about 29 ml. It is used in both the imperial and the US customary systems, and it is sometimes referred to simply as an ounce in cases where no confusion with the...
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| x Cubic metre | m³ | Volume | m³ |
The cubic metre (US spelling: cubic meter, symbol: m) is the SI derived unit of volume. It is the volume of a cube with edges one metre in length. An alternative name, which allowed a different usage with metric prefixes, was the stère. Another...
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| x Milliliter | mL | Volume | mL |
A milliliter is a metric unit of volume that is 1/1000 of a liter. It is the same as a cubic centimeter.
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| x Gallon (Imperial) | Imp. gal. | Volume | Imp. gal. |
The Imperial gallon was based on the volume of 10 lb. of distilled water weighed in air with brass weights with the barometer standing at 30 inches of mercury and at a temperature of 62 °F. In 1963, this definition was refined as the space occupied...
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| x Pint (Imperial) | Imp. pt. | Volume | Imp. pt. |
The imperial pint is a unit of volume or capacity that is equivalent to 20 UK fluid ounces or 0.56826125 litres.
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| x Kilogram |
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kg | Mass | kg |
The kilogram (symbol: kg) is the base unit of mass in the International System of Units (SI, from the French Le Système International d’Unités). The kilogram is defined as being equal to the mass of the International Prototype Kilogram (IPK), which...
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| x Pound | lb | Mass | # |
The pound or pound-mass (abbreviation: lb, lbm, or sometimes in the United States: #) is a unit of mass used in the imperial, United States customary and other systems of measurement. A number of different definitions have been used, the most common...
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| x Tonne |
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t | Mass | t |
A tonne (t) or metric ton (U.S.), also referred to as a metric tonne, is a measurement of mass equal to 1,000 kg or 2,204.62262 lb, or approximately the mass of one cubic metre of water. It is not an SI unit but is accepted for use with the SI. If...
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| x Ounce | oz | Mass | oz av |
The ounce (abbreviated: oz, the old Italian word onza, now spelled oncia; apothecary symbol: ℥) is a unit of mass with several definitions, the most commonly used of which are equal to approximately 28 grams. The ounce is used in a number of...
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| x Long ton | L/T | Mass | ton |
Long ton (weight ton or imperial ton) is the name for the unit called the "ton" in the avoirdupois or Imperial system of measurements, as used in the United Kingdom and several other Commonwealth countries. It has been mostly replaced by the tonne,...
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| x Short ton | S/T | Mass | sh tn |
The short ton is a unit of weight equal to 2,000 pounds (907.18474 kg) . In the United States it is often called simply ton without distinguishing it from the metric ton (or tonne, 1,000 kilograms) or the long ton (2,240 pounds (1,020 kg)); rather,...
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| x Stone | st | Mass | st |
The stone is a unit of measure, which in practice is usually a mass of about 6.35 kilograms.
It ceased to be legal for trade in United Kingdom in 1985, was defined in British legislation as being a weight or mass [sic] equal to 14 [avoirdupois]...
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| x Milligram | mg | Mass | mg |
A milligram is a metric mass unit that is 1/1000th of a gram, or 1/1000000th of a kilogram.
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| x Gram |
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g | Mass | g |
A Gram is a unit of measurement for mass (or weight). It is 1/1000th of a Kilogram.
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| x Microgram | µg | Mass | µg |
A microgram is a Metric unit of weight that is 1/1000th of a milligram.
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| x Centimeter |
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cm | Length | cm |
A centimetre (American spelling: centimeter, symbol cm) is a unit of length in the metric system, equal to one hundredth of a metre, which is the current SI base unit of length. Centi is the SI prefix for a factor of 10. Hence a centimetre can be...
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| x Inch |
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in | Length | in |
An inch (plural: inches; symbol or abbreviation: in or, sometimes, ″ – a double prime) is the name of a unit of length in a number of different systems, including Imperial units, and United States customary units. There are 36 inches in a yard and...
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| x Meter |
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m | Length | m |
The metre or meter is the basic unit of length in the International System of Units (SI). Historically, the metre was defined by the French Academy of Sciences as the length between two marks on a platinum-iridium bar, which was designed to...
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| x Mile |
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mi | Length | mi |
A mile is a unit of length in a number of different systems. In contemporary English, mile most commonly refers to the statute mile of 1,609.344 meters (1,760 yards = 5,280 feet) or the nautical mile of 1,852 meters (about 6,076 ft 1/8 in). There...
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| x Micrometer |
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µm | Length | µm |
A micrometre or micron (American spelling: micrometer; symbol µm) is one millionth of a metre,or equivalently one thousandth of a millimetre.
It can be written in scientific notation as 1×10 m, meaning ⁄1000000 m.
Or equivalent to one thousand...
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| x Yard |
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yd | Length | yd |
A yard (abbreviation: yd) is a unit of length in several different systems, including English units, Imperial units, and United States customary units. It is equal to 3 feet or 36 inches, although its length in SI units varied slightly from system...
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| x Kilometer | km | Length | km |
The kilometre (American spelling: kilometer), symbol km is a unit of length in the metric system, equal to one thousand metres and is therefore exactly equal to the distance travelled by light in free space in ⁄ 299,792.458 of a second.
It is the...
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| x Millimeter |
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mm | Length | mm |
The millimetre (American spelling: millimeter, symbol mm) is a unit of length in the metric system, equal to one thousandth of a metre, which is the current SI base unit of length.
Equal to 1000 micrometres. Equal to 1000000 nanometres.
For the...
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| x Ångström | Å | Length | Å |
The ångström or angstrom (symbol Å) (pronounced /ˈɔːŋstrəm/; Swedish: IPA: [ˈɔŋstrˈøm]) is an internationally recognized unit of length equal to 0.1 nanometre or 1 × 10 metres. It is named after Anders Jonas Ångström. Although accepted for use, it...
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| x Foot | ft | Length | ft |
A foot (plural: feet or foot; symbol or abbreviation: ft or, sometimes, ′ – the prime symbol) is a non-SI unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. Its size can vary...
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| x Hectare | ha | Area | ha |
A hectare (symbol ha, pronounced /ˈhɛktɛər/) is a unit of area equal to 10,000 square metres (107,639 sq ft), or one square hectometre (100 metres, squared), and is commonly used for measuring land area.
The hectare is used in most countries around...
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| x Square kilometer | km² | Area | km² |
Square kilometre (U.S. spelling: square kilometer), symbol km, is a decimal multiple of the SI unit of surface area, the square metre, one of the SI derived units. 1 km is equal to:
Conversely:
Note: "km" means (km), square kilometre or kilometre...
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| x Square mile |
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mi² | Area | mi² |
The square mile (sometimes written as mi²) is an imperial and US unit of measure for an area equal to the area of a square of one statute mile. It should not be confused with miles square, which refers to the number of miles on each side squared....
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| x Square yard | yd² | Area | yd² |
The square yard is an imperial/US customary (non-metric) unit of area, formerly used in most of the English-speaking world but now generally replaced by the square metre outside of the US. It is defined as the area of a square with sides of one yard...
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| x Square meter |
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m² | Area | m² |
The square metre (also spelled square meter, see spelling differences) is the SI derived unit of area, with symbol m(33A1 in Unicode). It is defined as the area of a square whose sides measure exactly one metre. The square metre is derived from the...
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| x Degree Celsius |
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°C | Temperature | °C |
Celsius (also historically known as centigrade) is a temperature scale that is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale two years before his death. The degree Celsius (°C) can refer to...
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| x Degree Fahrenheit |
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°F | Temperature | °F |
Fahrenheit is the temperature scale proposed in 1724 by, and named after, the physicist Daniel Gabriel Fahrenheit (1686–1736). Today, the scale has been replaced by the Celsius scale in most countries; it is still in use for non-scientific purposes...
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| x Kelvin |
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K | Temperature | K |
The kelvin (symbol: K) is a unit increment of temperature and is one of the seven SI base units. The Kelvin scale is a thermodynamic (absolute) temperature scale where absolute zero, the theoretical absence of all thermal energy, is zero kelvin (0 K...
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| x Degree Rankine | °R | Temperature | °R |
Rankine is a thermodynamic (absolute) temperature scale named after the British engineer and physicist William John Macquorn Rankine, who proposed it in 1859.
The symbol is R (or Ra if necessary to distinguish it from the Rømer and Réaumur scales)....
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| °Ra | |||||
| x Calorie |
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cal | Energy | cal |
The calorie is a pre-SI metric unit of energy. The unit was first defined by Professor Nicolas Clément in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867. In most fields its use is archaic,...
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| x Joule | J | Energy | J |
The joule (symbol J), named for James Prescott Joule, is the derived unit of energy in the International System of Units. It is the energy exerted by a force of one newton acting to move an object through a distance of one metre. In terms of...
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| x Watt-hour |
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W·h | Energy | W·h |
The kilowatt hour, or kilowatt-hour, (symbol kW·h, kWh) is a unit of energy equal to 3,600,000 joules.
Energy in watt hours is the multiplication of power in watts and time in hours.
The most common use of the unit is when energy is delivered by...
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| x Pound-force per square inch |
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psi | Pressure | psi |
The pound per square inch or, more accurately, pound-force per square inch (symbol: psi or lbf/in² or lbf/in²) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an...
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| lbf/in² | |||||
| x Torr |
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mmHg | Pressure | Torr |
The torr (symbol: Torr) is a non-SI unit of pressure defined as ⁄760 of a standard atmosphere, chosen to be roughly equal to the fluid pressure exerted by a millimeter of mercury, i.e. a pressure of 1 Torr is approximately equal to 1 mmHg. Note that...
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| mmHg | |||||
| x Pascal | Pa | Pressure | Pa |
The pascal (symbol: Pa) is the SI derived unit of pressure, stress, Young's modulus and tensile strength. It is a measure of force per unit area, defined as one newton per square metre. In everyday life, the pascal is perhaps best known from...
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| x Bar | bar | Pressure | bar |
The bar (symbol bar) is a unit of pressure equal to 100 kilopascals, and rougly equal to the atmospheric pressure on Earth at sea level. Other units derived from the bar are the decibar (symbol dbar), centibar (symbol cbar), and millibar (symbol...
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| x Atmosphere | atm | Pressure | atm |
The standard atmosphere is an international reference pressure defined as 101,325 Pa and formerly used as unit of pressure (symbol: atm). For practical purposes it has been replaced by the bar which is 100,000 Pa. The difference of about 1% is not...
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| x Day |
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d | Time | d |
A day (symbol d) is a unit of time equivalent to approximately 24 hours. It is not an SI unit but it is accepted for use with SI. The SI unit of time is the second.
The word 'day' can also refer to the (roughly) half of the day that is not night,...
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| x Hour |
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h | Time | h |
The hour (common symbol h or hr) is a unit of time. It is not an SI unit but is accepted for use with the SI.
In modern usage, an hour is a unit of measurement of time of the duration of 60 minutes, or 3600 seconds. It is 1/24 of a median Earth day....
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| hr | |||||
| x Minute |
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min | Time | min |
A minute is a unit of measurement of time or of angle.
The minute is a unit of time equal to 1/60th of an hour or 60 seconds. In the UTC time scale, a minute occasionally has 59 or 61 seconds; see leap second. The minute is not an SI unit; however,...
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| x Second | s | Time | s |
The second (SI symbol: s), sometimes abbreviated sec., is the name of a unit of time, and is the International System of Units (SI) base unit of time. It may be measured using a clock.
Early definitions of the second were based on the motion of the...
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| x Metre per second | m/s | Speed | m/s |
Metre per second (U.S. spelling: meter per second) is an SI derived unit of both speed (scalar) and velocity (vector quantity which specifies both magnitude and a specific direction), defined by distance in metres divided by time in seconds.
This is...
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| x Miles per hour |
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mph | Speed | mph |
The mile per hour is a unit of speed, measured in Imperial units expressing the number of international miles covered per hour.
It is currently the unit used for speed limits, and speeds, on roads in the United Kingdom and United States. It is also...
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| x Kilometres per hour | km/h | Speed | km/h |
The kilometre per hour (American English: kilometer per hour) is a unit of speed or velocity, expressing the number of kilometers traveled in one hour. The unit symbol is km/h or km·h; however, the colloquial abbreviations "kph" and "kmph" are...
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| x Watt | W | Power | W |
The watt (symbol: W) is a derived unit of power in the International System of Units (SI). It measures rate of energy conversion. One watt is equivalent to 1 joule (J) of energy per second.
In terms of mechanical energy, one watt is the rate at...
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| x Mechanical horsepower | hp | Power | hp |
The term horsepower was invented by the engineer James Watt in 1782. Watt (1736 to 1819) is most famous for his work on improving the performance of steam engines. Watt was working with ponies lifting coal at a coal mine, and he
wanted to define the...
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| x Metric horsepower | hp | Power | ch |
Metric horsepower began in Germany in the 19th century and became
popular across Europe and Asia. The various units used to indicate this
definition ("PS", "CV", "pk", and "ch") all translate to "horse power"
in English, so it is common to see these...
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| x Boiler horsepower | hp | Power | hp |
(From Wikipedia, “Horsepower.”)
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| x Electrical horsepower | hp | Power | hp |
(From Wikipedia, “Horsepower.”)
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| x Kilowatt | kW | Power | kW | ||
| x Milliwatt | mW | Power | mW | ||
