Temperature Converter – Celsius, Fahrenheit & Kelvin

Temperature Converter

Temperature Converter





In daily life, the measurement of temperature plays an important role. It affects everything from weather forecasts to scientific observations. There are three of the most commonly used temperature scales are Celsius, Fahrenheit, and Kelvin. Each scale has an interesting history, because of scientific advancement and practical necessities of their times. We reveal the origins of these temperature scales.



Measure on the Basis of Basic Conversion Formulas of Celsius, Fahrenheit, and Kelvin.

Celsius – Its History and Importance

 The Celsius scale is a temperature measurement system widely used in the world. It is a fundamental unit of temperature measurement in the International System of Units (SI). The Celsius scale is named after Anders Celsius. He was a Swedish astronomer, physicist, and mathematician who developed this scale in the 18th century. Here’s a brief history of Celsius and its importance

Anders Celsius (1701-1744)

In 1701, Anders Celsius was born in Uppsala, Sweden. He made significant contributions to various fields of science. In 1742, he proposed a temperature scale based on water’s freezing and boiling points. In his original scale, he defined 0 degrees as the boiling point of water and 100 degrees as the freezing point of water. This scale was the reverse of the modern Celsius scale.

Reversal of the Scale

After the death of Anders Celsius in 1744, the Swedish botanist Carl Linnaeus reversed the scale. In modern form, 0 degrees represents the freezing point of water and 100 degrees represents the boiling point of water at standard atmospheric pressure. This reversal made the scale more consistent with other measurement systems and easier to use for scientific purposes.

Meaning of Celsius

The Celsius scale also called the centigrade scale, is based on the fact that water freezes at 0° and boils at 100°.


Scientific Consistency: The Celsius scale is important in scientific research and in education. It has much consistency and compatibility with the SI system, making it a preferred choice for temperature measurements.

Everyday Use: Celsius is the primary temperature scale used in daily life It is used for weather forecasts, setting thermostat temperatures, cooking, and more.

Climate Science: Celsius is commonly used in climate science. It helps to measure and analyze temperature changes and trends over time.

Temperature Conversions

 We can easily convert the temperature in Celsius to other scales like kelvin and Fahrenheit:

Celsius to Fahrenheit:

    °F=(°C×9/5) +32

Celsius to Kelvin:


FAHRENHEIT – Its History and Importance

In the 18th century, a Polish-German physicist Daniel Fahrenheit developed the temperature scale. This temperature scale is named after its creator, Daniel Fahrenheit. It is one of the three most commonly used temperature scales in the world, alongside Celsius (Centigrade) and Kelvin.

Daniel Fahrenheit

Daniel Gabriel Fahrenheit was born on May 24, 1686, in Gdansk, Poland. He developed the Fahrenheit scale in the early 18th century. He is believed to have created the scale around 1714. His motivation was to design a temperature scale that was more precise than existing ones and was based on practical measurements. He developed a mercury-in-glass thermometer and used it to establish fixed points for his temperature scale.

Reference Points

Fahrenheit’s scale originally used two reference points:

0°F: This was initially defined as the lowest temperature he could achieve with a mixture of ice and salt.

100°F: This was originally defined as human body temperature (although it’s not precisely equivalent to the modern definition of 98.6°F).


Fahrenheit interpolated the scale between these two reference points by dividing the interval into 180 equal parts, hence the division of the Fahrenheit scale into degrees.

Temperature Conversions

 To convert between Fahrenheit and Celsius or Kelvin, you can use the formula mentioned in the previous response.

Fahrenheit to Celsius:

Celsius (°C) = (Fahrenheit (°F) – 32) × 5/9

Celsius to Kelvin: 

Kelvin (K) = Celsius (°C) + 273.15

KELVIN– Its History and Importance

The Kelvin scale, is often simply referred to as “Kelvin” and represented as K. This is the primary temperature scale used in scientific research and international standards. It is named after Lord Kelvin, the Scottish physicist and engineer William Thomson.


The Kelvin scale was established in the mid-19th century. Lord Kelvin proposed it as an absolute temperature scale. Because it starts from absolute zero, the lowest theoretically possible temperature, at which the fundamental particles of matter have minimal thermal motion.

Reference Point

The Kelvin scale is based on the properties of gases when they expand or contract with the change in temperature. The absolute zero point corresponds to the point at which all molecular motion theoretically stops.

Fixed Points

Kelvin established two fixed points:

0 K: It is the absolute zero point at which molecules of matter shows theoretical motion.

273.15 K: The triple point of water, which is the temperature at which water coexists in all three phases: solid (ice), liquid (water), and gas (vapor), at a specific pressure.


We can easily convert the temperature into Celsius and Fahrenheit by the given formulas: 

Kelvin to Fahrenheit:

°F = (K – 273.15) × 9/5 + 32

Kelvin to Celsius:

°C = K – 273.15