Temperature Conversion Calculator – Celsius, Fahrenheit and Kelvin
Temperature is one of the most commonly measured physical quantities in chemistry, physics, laboratories and everyday life. However, temperature can be expressed using different temperature scales such as Celsius, Fahrenheit and Kelvin.
Dear Friends, this Temperature Conversion Calculator can be used to quickly convert temperature from Celsius to Fahrenheit, Celsius to Kelvin, Fahrenheit to Celsius, Fahrenheit to Kelvin, Kelvin to Celsius and Kelvin to Fahrenheit, means in short from any scale to any other scale.
To calculate, enter a temperature, select the units, and the calculator will automatically give the converted value for quick answer. However, to learn the mind and maths behind the conversion, read completely till end.
Temperature Conversion Calculator
Temperature Conversion Calculator
How to Use the Temperature Converter?
- Enter the temperature value in the input box.
- Select the original temperature scale from the 'From' option.
- Select the required temperature scale from the 'To' option.
- Click on the 'Convert Temperature' button.
- The converted temperature will be displayed immediately.
For example, if you enter 25 °C and select Fahrenheit, the calculator gives 77 °F.
Temperature Scales
There are three commonly known temperature scales: Celsius, Fahrenheit and Kelvin.
1. Celsius Scale
The Celsius scale is represented by °C. It is commonly used for measuring temperature in everyday life and is also widely used in science.
On the Celsius scale, the freezing point of water is 0 °C and the boiling point of water is 100 °C under standard atmospheric pressure. Thus, the interval between these two reference temperatures is divided into 100 equal parts.
The Celsius scale was proposed by Swedish astronomer and physicist Anders Celsius (1701–1744) in 1742. Interestingly, his original scale was reversed: he assigned 0 degrees to the boiling point of water and 100 degrees to the freezing point. The scale was later reversed to the form used today.
Celsius Conversion Formula
To convert Celsius into Fahrenheit:
°F = (°C × 9/5) + 32
To convert Celsius into Kelvin:
K = °C + 273.15
Example
Convert 25 °C into Fahrenheit:
°F = (25 × 9/5) + 32
°F = 45 + 32
°F = 77 °F
2. Fahrenheit Scale
The Fahrenheit scale is represented by °F. It is named after Daniel Gabriel Fahrenheit (1686–1736), a physicist and instrument maker.
Fahrenheit introduced his temperature scale in 1724. In the familiar form of the scale, the freezing point of water is 32 °F and the boiling point of water is 212 °F at standard atmospheric pressure.
The interval between the freezing and boiling points of water is therefore divided into 180 degrees on the Fahrenheit scale.
Fahrenheit Conversion Formula
To convert Fahrenheit into Celsius:
°C = (°F − 32) × 5/9
To convert Fahrenheit into Kelvin:
K = (°F − 32) × 5/9 + 273.15
Example
Convert 98.6 °F into Celsius:
°C = (98.6 − 32) × 5/9
°C = 66.6 × 5/9
°C = 37 °C
3. Kelvin Scale
The Kelvin scale is the absolute temperature scale used in science. Its unit is called the kelvin and its symbol is K.
Unlike Celsius and Fahrenheit, we do not write a 'degree sign' with kelvin. For example, we write 300 K, not 300 °K.
The Kelvin scale begins at absolute zero, which is 0 K. Absolute zero corresponds to −273.15 °C and −459.67 °F.
The Kelvin scale was developed from the work of British physicist William Thomson, who was later known as Lord Kelvin. In 1848, he described an absolute thermometric scale based on thermodynamic principles.
The size of one kelvin is the same as the size of one degree Celsius:
1 K temperature difference = 1 °C temperature difference
The important difference is the position of zero.
For example:
0 °C = 273.15 K
and
100 °C = 373.15 K
The kelvin is the SI base unit of thermodynamic temperature.
Kelvin Conversion Formula
To convert Kelvin into Celsius:
°C = K − 273.15
To convert Kelvin into Fahrenheit:
°F = (K − 273.15) × 9/5 + 32
Example
Convert 300 K into Celsius:
°C = 300 − 273.15
°C = 26.85 °C
Temperature Conversion Formulas
| Conversion | Formula |
|---|---|
| Celsius → Fahrenheit | °F = (°C × 9/5) + 32 |
| Fahrenheit → Celsius | °C = (°F − 32) × 5/9 |
| Celsius → Kelvin | K = °C + 273.15 |
| Kelvin → Celsius | °C = K − 273.15 |
| Fahrenheit → Kelvin | K = (°F − 32) × 5/9 + 273.15 |
| Kelvin → Fahrenheit | °F = (K − 273.15) × 9/5 + 32 |
These formulas can be used for manual conversion of temperature from one scale to another.
Important Temperature Values
| Temperature | Celsius | Fahrenheit | Kelvin |
|---|---|---|---|
| Absolute zero | −273.15 °C | −459.67 °F | 0 K |
| Freezing point of water | 0 °C | 32 °F | 273.15 K |
| Normal human body temperature* | 37 °C | 98.6 °F | 310.15 K |
| Boiling point of water | 100 °C | 212 °F | 373.15 K |
*37 °C is a commonly used reference value; actual human body temperature varies among individuals and measurement conditions.
Difference Between Celsius, Fahrenheit and Kelvin
The main difference between these scales is their zero point and the size of their temperature intervals.
Celsius: Water freezes at 0 °C and boils at 100 °C under standard atmospheric pressure.
Fahrenheit: Water freezes at 32 °F and boils at 212 °F under standard atmospheric pressure.
Kelvin: The scale begins at absolute zero, 0 K, and has the same size of temperature interval as Celsius.
A temperature difference of 1 °C is equal to 1 K, while a temperature difference of 1 °C is equal to 1.8 °F.
One interesting point is that −40 °C = −40 °F. This is the temperature at which the Celsius and Fahrenheit scales have the same numerical value.
Celsius, Fahrenheit and Kelvin – Quick Facts
- Celsius scale was introduced by Anders Celsius in 1742.
- Fahrenheit scale was introduced by Daniel Gabriel Fahrenheit in 1724.
- Kelvin scale was developed from the work of William Thomson (Lord Kelvin) in the 19th century.
- Celsius and Fahrenheit are written with a degree symbol: °C and °F.
- Kelvin is written without a degree symbol: K.
- 0 K represents absolute zero.
- 0 °C = 273.15 K.
- 100 °C = 373.15 K.
- 0 °C = 32 °F.
- 100 °C = 212 °F.
- −40 °C = −40 °F.
- Kelvin is the SI base unit of thermodynamic temperature.
Final Key Takeaway
Temperature conversion is frequently required in chemistry, physics, laboratory work, engineering and everyday life. The Celsius, Fahrenheit and Kelvin scales use different reference points, but their mathematical relationships are well defined.
The temperature conversion calculator above makes it easy to convert a temperature from one scale to another without doing the calculation manually. In science, for laboratory and scientific calculations, remember that Kelvin is the SI unit of thermodynamic temperature and is written without the degree symbol.
🔍 Learn more basic concepts of chemistry at below link-
- Matter in our surroundings
- Is matter around us pure
- Atoms and molecules
- Structure of the atom
- Periodic Table of Elements
- Chemical Bonding and Reactions
- Chemical Reactions and Equations
- Acids, Bases and Salts
- Metals and Non-Metals
- Carbon and its Compounds
- Periodic Classification of Elements
- Some basic concept of chemistry
- Structure of atom
- Classification of elements and periodicity in properties
- Chemical bonding and molecular structure
- Thermodynamics
- Equilibrium
- Redox reactions
- Organic chemistry – some basic principles and techniques
- Hydrocarbon
- Hydrogen
- The s -block elements
- The p -block elements
- States of matter
- Solution
- Electrochemistry
- Chemical kinetics
- d-and f-block elements
- Coordination compounds
- Haloalkanes and haloarenes
- Alcohols, phenols and ethers
- Aldehydes, ketones and carboxylic acids
- Amines
- Biomolecules
- Surface Chemistry
- General Principle and Process of Isolation of the Elements
- p-block elements
- Polymers
- Chemistry in Everyday Life
- Solid State Chemistry
- Reactions of Aromatic Compounds (Part 2)
- Electrophilic Aromatic Substitution – Reaction of Aromatic Compounds (Part 1)
- Solid State Chemistry
- Iron Metalloporphyrins Complexes in Bioinorganic Molecules
- Zinc Metalloenzymes
- Mathematical Concepts
- Atomic Structure
- Thermodynamics
- Principles of Spectroscopy
- Electromagnetic spectrum UV and Visible Spectroscopy
- Chemistry of Elements of First Transition Series
- The Strong Force, Nuclei, and the Quark–Gluon World
- Symmetry and Group Theory
- 100 Science Facts that Sound Fake but are True
- Join us at Telegram: https://t.me/chemistrynotesinfo
- Connect with us at WhatsApp: https://whatsapp.com/channel/0029VaD6VCAJuyA4VfuQw03h
✍️ Author
Jitendra Singh Sandhu
(Search Author ✍️ on Amazon for science books)
Explore our Science Book in English at
Amazon.com Book Store | Amazon.in Book Store | Author Page | Flipkart Book Store | NotionPress Book Store
%20(1).png "Interesting Facts About All Elements of Periodic Table - Fun Facts, Fascinating History, and Essential Properties of Every Element")
1. Interesting Facts About All Elements of Periodic Table
2. Science Adventures with Jag, Dils and Dad
