Throughout the world, there are many various systems of measuring temperature. The three most important ones are Fahrenheit (F), Kelvin (K), and Celsius (C).

You are watching: At what temperature do the fahrenheit and kelvin scales have the same numerical value

Key Facts & Summary

Celsius and also Fahrenheit are degree scales. The degree symbol is not provided to report temperature making use of the Kelvin range, rather, they are provided as Kelvins.Water boils at 100 levels Celsius or 212 levels Fahrenheit, or 373.15 Kelvins.Water freezes at 0 degrees Celsius or 32 Degrees Fahrenheit, or 273.15 Kelvins.Absolute zero is 0 Kelvins. This is the lowest temperature any substance deserve to drop down to.Celsius and Fahrenheit are the exact same at – 40 levels because the scales converge.Celsius and also Kelvins become equal at high temperatures as the difference of 273.15 between them gets lost in the noise.0 degrees Celsius is equal to 32 levels Fahrenheit. The fundamental formula is (°C× 9/5) + 32 = °F.0 degrees Celsius is equal to 273.15 Kelvins. The basic formula is °C+ 273.15 = K.The standard formula for converting Fahrenheit into Celsius is (°F− 32) × 5/9 =°C.To transform Fahrenheit levels right into Kelvins, (°F− 32) × 5/9 + 273.15 =K.To convert Kelvins into Celsius degrees, the formula is K− 273.15 =°C, while the formula of converting Kelvins into Fahrenheit levels is (K− 273.15) × 9/5 + 32 =°F.Temperature have the right to be simply defined as a measure of the hotness or coldness of an item.Temperature is measured using a thermometer – we observe the result of temperature on the substance inside it.

Temperature Conversion

Whether we usage Celsius, Fahrenheit, or Kelvin in our efforts to measure temperatures, is not that vital. However, if we uncover ourselves in particular areas wright here the temperature measurement is various, learning the distinctions in between the three the majority of supplied units may come in handy.


All 3 are correct methods of noting temperatures and also they all deserve to be obtained from one an additional with formulas since they are regarded each other.

But are these devices of measurement any various from each other except for their different values? Yes and no, and here is a little bit about eextremely among them.


Also referred to as centigrade, is a range based on 0 degrees for the freezing allude of water and 100 degrees for the boiling suggest of water. This device was created in 1742 by the Swedish astronomer Anders Celsius.

Some still call it the centigrade scale bereason of the 100-degree interval between the identified points. The Celsius scale is component of themetric systemand is provided to meacertain the temperature in many nations.


It is the most basic scale to usage and also though it is supplied throughout the people, tright here is one exemption, the United States. In the US, the Fahrenheit scale prevails however the Celsius scale is likewise not embraced in specific places wright here Kelvin is used.

The normal human body temperature is32°C, and the absolute zero value is collection at-273.15°C, on this range. To transform Celsius to Fahrenheit is pretty simple:

°C to °F: Multiply by 9, then divide by 5 and also then include 32.

Example: How to convert 28°C to Fahrenheit (°F).First step: 28°C × 9/5 = 252/5 = 50.4.Second step: 50.4 + 32 = 82°F.

The Celsius scale and the Fahrenheit scalesynchronizes at -40°, which is the very same for both. When it pertains to converting Celsius levels into Kelvins, the formula is also simpler.

0 levels Celsius is equal to 273.15 Kelvins. The fundamental formula is °C+ 273.15 = K. Kelvin to Celsius: Add 273.

Example: How to convert 28°C to Kelvin (K).

First step: 28°C + 273.15 = 301.15 K



This temperature range is based upon 32 levels for the freezing allude of water, and 212 degrees for the boiling point. The interval in between the 2 points is divided right into 180 equal components.

The Gerguy physicist Daniel Gabriel Fahrenheit devised this range in 1724. The average huguy body temperature is 98.6°F, while the absolute zero is-459.67°F on this range.


The Fahrenheit range is welcomed and also is provided in theUnited Statesand also some of its areas. To convert Fahrenheit levels into Celsius, below is the formula:

°F to °C: Subtract 32, then multiply by 5, then divide by 9. The fundamental formula is (°F – 32) × 5/9 = °C or precisely (F – 32)/1.8.

Example: How to transform 98.6° Fahrenheit right into Celsius (°C)First step: 98.6°F – 32 = 66.6.2nd step: 66.6× 5/9 = 333/9 = 37°C.

When it involves converting Fahrenheit levels into Kelvins, the formula is even simpler.

Subtract 32, multiply by 5, divide by 9, then include 273.15.

(°F− 32) × 5/9 + 273.15 =K.

Example: How to transform 98.6° Fahrenheit right into Kelvin (K)

(98.6°F− 32) × 5/9 + 273.15 = 310.15K


This temperature scale is called after the British mathematician and also physicist William Thomkid Kelvin, who proposed it in 1848. It is an absolute temperature scale, having an absolute zero listed below which temperatures execute not exist.

Each unit on this range is referred to as a Kelvin fairly than a degree. For this reason, just the K, not the level symbol °, is offered when reporting temperatures in Kelvin. There are no negative numbers on the Kelvin range, as the lowest number is 0 K.


Absolute zero cannot technically be completed.It is the temperature at which molecules would stop relocating – it is for this reason “infinitely cold.”

The freezing suggest of water in Kelvin is 273.15K and 373.15K the boiling suggest. The idea for the Kelvin range was sparked by a exploration in the 1800s of a connection between the volume and the temperature of a gas.

When it involves the other scales, Kelvins and also Celsius come to be equal at high temperatures as the difference of 273.15 in between them gets lost in the noise.

To convert Kelvin into Celsius, the formula is fairly basic.

K to °C: Add 273

K− 273.15 =°C

Example: How to transform 35°C right into Kelvin (K)

35°C+ 273.15 = 308.15K

To convert Kelvin into Fahrenheit, the formula is:

(K− 273.15) × 9/5 + 32 =°F.

Subtract 273.15, multiply by 1.8, then add 32.

Example: How to convert 75°F right into Kelvin (K)

(75°F− 32) × 5/9 + 273.15 = 297.039K


Fun Facts

The hottest temperature videotaped on Planet is 57.8°C / 136°F, tape-recorded in Al’Aziziyah, Lybia on September 13, 1922.The cearliest temperature videotaped on Planet is -89.2°C / -128.6°F, recorded at Vostok Station, Antarctica on July 21, 1983.In the US, one of the highest possible temperatures ever before taped was 56.7°C / 134°F, videotaped in Death Valley, The golden state on July 10, 1913.In New Zealand, the highest possible temperature tape-recorded is 42.4°C / 108.3°F, videotaped in both Rangiora and also Marlboturbulent on February 7, 1973.In Africa, the lowest temperature ever before recorded is -24°C / -11°F, taped in Ifrane, Morocco on February 11, 1935.The inventor of the Kelvin scale also wrote the second law of thermodynamics, which says that warm will certainly not flow from a chillier body to a hotter body.

Convariation Formulas

Kelvin to Fahrenheit: Subtract 273.15, multiply by 1.8, then add 32Fahrenheit to Kelvin: Subtract 32, multiply by 5, divide by 9, then add 273.15Kelvin to Celsius: Add 273Celsius to Kelvin: Subtract 273Fahrenheit to Celsius: Subtract 32, multiply by 5, then divide by 9Celsius to Fahrenheit: Multiply by 9, divide by 5, then include 32


Mercury thermometers

Not also long back, thermometers had actually mercury inside the glass. If the temperature obtained hotter, the mercury broadened and relocated up through the narrowhead tube.

We might watch what the temperature was by reading it off the scale of numbers on the tube. However, mercury is exceptionally toxic and also it was quickly reinserted via various liquids.


The concept continues to be the same regardmuch less, as the temperature goes up, the liquid expands and also rises, and as soon as the temperature goes down, the liquid shrinks and also drops dvery own the tube.

See more: Which Best Describes The Corinthian Greek Order ? Which Best Describes The Corinthian Greek Order

Did you know?

The Kelvin range isn’t the only absolute temperature scale. Tright here is additionally the Rankine temperature scale. It is provided largely by designers.It is unknown if Daniel Gabriel Fahrenheit was a freemachild, yet, many type of believe that he was because tright here are 32 degrees of enlightenment, and also he chose to use 32 as the melting temperature of the water in his range.AndersCelsiusdesigned his temperaturescalein 1742 utilizing the mercury thermometer.


Image sources: