Unit Conversion
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Why Use a Temperature Converter?
Temperature is measured using different scales around the world. The Celsius scale is the global standard for everyday use, while the Fahrenheit scale is common in the United States. Scientists and engineers also use Kelvin (absolute scale) and Rankine (absolute Fahrenheit scale) in thermodynamics and physics.
This converter supports all 4 major temperature scales with instant conversion and absolute zero validation. Whether you're reading a weather forecast, adjusting an oven, or solving a physics problem, this tool gives you accurate results in one click.
How to Use This Converter
- Enter a temperature value and select the source scale
- Select the target scale you want to convert to
- Click Convert to see the result
- Use Swap to reverse the conversion direction
Common Use Cases
- Weather forecast reading
- Cooking & oven settings
- Science & lab experiments
- Physics & engineering
- Travel temperature prep
- HVAC & thermostat setup
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 |
| Celsius → Rankine | °R = (°C × 9/5) + 491.67 |
| Fahrenheit → Kelvin | K = (°F − 32) × 5/9 + 273.15 |
| Fahrenheit → Rankine | °R = °F + 459.67 |
| Kelvin → Rankine | °R = K × 9/5 |
Key Temperature Reference Points
| Description | °C | °F | K | °R |
|---|---|---|---|---|
| Absolute Zero | −273.15 | −459.67 | 0 | 0 |
| Water Freezes | 0 | 32 | 273.15 | 491.67 |
| Human Body Temp | 37 | 98.6 | 310.15 | 558.27 |
| Water Boils | 100 | 212 | 373.15 | 671.67 |
FAQ – Temperature Converter
What is a Temperature Converter?
A Temperature Converter allows you to easily convert temperature readings between different units such as Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R). It's useful for science, weather tracking, cooking, and engineering.
How does the Temperature Converter work?
You enter a temperature in one unit, click Convert, and the calculator converts it into the desired unit using accurate conversion formulas. All four scales are shown simultaneously.
Which temperature scales can I convert?
The converter supports four temperature scales — Celsius (°C), Fahrenheit (°F), Kelvin (K), and Rankine (°R).
What is the formula for Celsius to Fahrenheit conversion?
The formula is: °F = (°C × 9/5) + 32. For example, 100°C = 212°F.
What is the formula for Fahrenheit to Celsius conversion?
The formula is: °C = (°F − 32) × 5/9. For example, 72°F ≈ 22.2°C.
Can this tool convert Kelvin to Celsius or Fahrenheit?
Yes. It can convert between all four scales — Kelvin, Celsius, Fahrenheit, and Rankine — useful for scientific and educational applications.
What is absolute zero?
Absolute zero is the lowest possible temperature where all molecular motion stops. It equals 0 K, −273.15°C, −459.67°F, or 0°R. The converter validates against this limit.
What is the Rankine scale used for?
Rankine (°R) is an absolute temperature scale based on Fahrenheit. It is used primarily in engineering thermodynamics in the United States, particularly in calculations involving the Rankine cycle.
What temperature is the same in Celsius and Fahrenheit?
−40° is the point where Celsius and Fahrenheit are equal. That is, −40°C = −40°F.
Is this calculator accurate for scientific use?
Yes. It follows precise mathematical formulas used in meteorology, physics, and engineering, with results rounded to 4 decimal places for reliable accuracy.