Temperature Converter
Instantly convert Temperature between SI and common engineering units including Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R). No formula lookup required.
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About
Fundamentals
Temperature is a basic physical quantity for measuring the relevant object; unit conversion unifies dimensions across standards, drawings and test data.
This tool uses Celsius (°C) as the base unit and scales the input by each unit's factor to the target; temperature and similar quantities use affine conversion $y=a x+b$. All factors are relative to SI.
History
Measurement of Temperature has a long history: ancient standards used body parts (cubit, foot) or nature (sundials, water clocks); the metric system (1790s) and SI (1960) unified global measurement.
Engineering applications
In mechanical design, trade, international drawings and test data, Temperature must often be converted between customary units such as Celsius (°C) and SI to keep dimensions consistent.
Glossary
| Base unit | Reference unit, usually SI (e.g. Celsius (°C)). |
| Conversion factor | Proportional factor between a unit and the base. |
| Linear / affine | Most units are linear; temperature needs an offset (affine). |
How to use
- Enter the value to convert in the Value box.
- Pick the source and target units from the From / To dropdowns.
- Click Convert; the result shows below. Use ⇅ to swap units.
Formula · Worked Example · Knowledge
Formula
Worked Example
Key Points
- Covers 4 common units with bidirectional conversion and unit swap.
- Engineering-significant figures; scientific notation for extreme values.
- Unifies dimensions across standards, test data and reports.
Parameters
Supported units
| Unit | Base factor |
|---|---|
| Celsius (°C) | |
| Fahrenheit (°F) | |
| Kelvin (K) | |
| Rankine (°R) |
Applications
- Energy, work, power conversion
- Refrigeration & thermal units
- Energy statistics comparison