Temperature Converter
Convert Celsius, Fahrenheit, Kelvin
4 temperature scales
Reference temperatures
All conversions display
The weather app says 28°C. Is that hot? The recipe says 350°F. Your oven is in Celsius. The science paper references 300 Kelvin. What does any of this actually mean in terms you understand?
Temperature scales are human inventions—arbitrary reference points that different cultures chose centuries ago. This converter translates between them instantly, so you can understand any temperature in your preferred scale.
What is Temperature Conversion?
Temperature conversion transforms readings between different temperature scales. Unlike length or weight, temperature scales don't share a zero point, making conversions require both multiplication and addition—not just simple ratios.
Key conversions:
°C to °F: (°C × 9/5) + 32
°F to °C: (°F - 32) × 5/9
°C to K: °C + 273.15
K to °C: K - 273.15
For rough °C to °F: double and add 30. (20°C ≈ 70°F, actual 68°F). For rough °F to °C: subtract 30 and halve. (70°F ≈ 20°C)
Why People Actually Need This Tool
Fahrenheit (US daily use), Celsius (global daily use and science), and Kelvin (absolute scale for physics). You'll encounter all three.
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Weather understanding — Convert forecasts between systems.
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Cooking — Adjust recipe temperatures for your oven's scale.
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Travel — Understand local weather in foreign temperature units.
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Science — Convert between Celsius and Kelvin for calculations.
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Medical — Convert body temperature between scales.
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HVAC — Understand heating/cooling specifications.
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Industrial — Convert process temperatures for international specifications.
How to Use the Temperature Converter
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Enter temperature — The value you want to convert.
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Select from scale — Celsius, Fahrenheit, or Kelvin.
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View all conversions — See equivalent in all scales simultaneously.
| Scale | Zero Point | Boiling Water | Common Use |
|---|---|---|---|
| Fahrenheit | Brine solution | 212°F | US weather, cooking |
| Celsius | Water freezing | 100°C | Global standard |
| Kelvin | Absolute zero | 373.15 K | Science, physics |
| Rankine | Absolute zero | 671.67 °R | US engineering |
A 10°C rise equals a 10 K rise—same size degrees. But 10°C ≠ 10 K (they differ by 273.15 at any point).
Real-World Use Cases
1. The Weather Understanding
Context: European vacation, forecast shows 35°C.
Problem: Is that comfortable or dangerously hot?
Solution: 35°C = 95°F. Very hot by any standard.
Outcome: Pack light clothes, plan for heat.
2. The Baking Conversion
Context: British recipe: "Bake at 180°C." American oven shows Fahrenheit.
Problem: What temperature setting?
Solution: 180°C = 356°F. Set oven to 350°F.
Outcome: Successful baking with correct temperature.
3. The Fever Check
Context: Child's temperature: 101°F. European doctor asks for Celsius.
Problem: Need to report in °C.
Solution: 101°F = 38.3°C. Mild fever in any scale.
Outcome: Accurate communication with healthcare provider.
4. The Science Homework
Context: Physics problem uses 300 K.
Problem: What's that in human-understandable terms?
Solution: 300 K = 26.85°C = 80.3°F. Warm room temperature.
Outcome: Physical intuition for the calculation.
5. The HVAC Setting
Context: Thermostat set to 72°F. European guest asks what temperature.
Problem: Need Celsius equivalent.
Solution: 72°F = 22.2°C. Typical comfortable indoor temp.
Outcome: Guest understands the room temperature.
6. The Industrial Spec
Context: Machine operates at 150°C. US manual wants Fahrenheit.
Problem: Convert for documentation.
Solution: 150°C = 302°F. Document both for international teams.
Outcome: Specs accessible to all team members.
7. The Cold Weather Crossover
Context: Curious about the temperature where °C and °F are the same.
Problem: What temperature reads the same on both scales?
Solution: -40°C = -40°F. The only crossover point.
Outcome: Fun fact and understanding of scale relationships.
Common Mistakes and How to Avoid Them
Temperature conversion requires addition/subtraction too. You can't just multiply Celsius by 2 to get Fahrenheit.
Privacy and Data Handling
This Temperature Converter operates entirely in your browser.
- No temperatures are sent to any server.
- No conversions are stored.
- No account required.
- Works completely offline.
Your data stays private.
Conclusion
Temperature scales are arbitrary human inventions that we're stuck with. Fahrenheit made sense to Daniel Fahrenheit in 1724. Celsius made sense to scientists wanting water-based references. Neither is "right"—they're just different.
This converter bridges those different choices. Whether you're cooking, traveling, studying, or just curious about the weather abroad, understand any temperature in your preferred scale.
Hot is hot. Cold is cold. Now you know how hot or cold in any units.