The History of the Thermometer at ThoughtCo gives a historical background on the major temperature scales.

Metric Association (USMA) has all sorts of useful information and history on the metric system.

More info about the metric system, including prefixes, at ChemTeam.

Metric Information and Conversions Home Page at the National Institute of Standards.

Learn more about the physical basis of temperature, absolute zero, and a whole lot more at the University of Colorado at Boulder.

As with any calculation you write out by hand, be sure to write out your units and make sure they cancel to the desired unit. Also remember the tip above when converting between units, be sure to include the negative sign in your calculation instead of (mistakenly) sticking it in at the end. These are usually, but not always, in degrees Celsius. Safety Emporium has all kinds of lab equipment such as this incubating rocking shakers and more.īe very careful to note the units when reading temperatures on a Safety Data Sheet. See also: boiling point and freezing point. Note: All measurements are at 1 atm of pressure. Notable Temperatures On The Various Temperature Scales This is an obsolete temperature scale where the freezing point of water is zero degrees Réaumur and the boiling point of water is 80 degrees Réaumur. Like the Kelvin scale, the Rankine scale has no negative temperatures. Absolute zero is set to zero and each change of one degree Rankine = a change of one degree Fahrenheit, but a Rankine and Fahrenheit temperature are never equal. This is the Fahrenheit analog of the Kelvin scale.

To convert a Fahrenheit temperature to Celsius, subtract 32 and multiply by 5/9. A change of 1 degree Fahrenheit equals a change of 5/9 = 0.56 degrees Celsius. This scale sets the freezing point of water to 32 degrees Fahrenheit and the boiling point of water to 212 degrees Fahrenheit.

Note: simply use 'Kelvin' or 'Kelvins', not 'degrees Kelvin' when using this unit.

To convert a Kelvin temperature to Celsius, subtract 273.15. There are no negative temperatures in the Kelvin scale. A change of one degree Celsius = a change of one Kelvin, but a Celsius temperature is never equal to a Kelvin temperature. This scale sets the lowest obtainable temperature ( absolute zero = the temperature at which all molecular motion completely ceases) to 0 degrees. To convert a Celsius temperature to Kelvin, add 273.15 To convert a Celsius temperature to Fahrenheit, multiply by 9/5 and add 32. A change of 1 degree Celsius equals a change of 9/5 = 1.8 degrees Fahrenheit. This scale sets the normal freezing point of water to 0 degrees Celsius and the normal boiling point of water to 100 degrees Celsius. Even in the U.S., scientists and technical people use the metric system because of its ease of use. The metric system has been adopted by almost every country except the United States.

Customary System) and metric (International System or SI or cgs) units. Many of the items you will find on an Safety Data Sheet come in both English (U.S. (Enter number on the left side answer appears on the right side) Sorry, you must enable Javascript and then reload the page for the calculator to work. If you convert a negative temperature, be sure to include the negative sign! For example, -31 oF = -35 oC, but +31 oF = -0.56 oC!

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