Celsius to Fahrenheit Converter (°C to °F)
Instantly convert between Celsius and Fahrenheit temperatures using this precise tool. Essential for weather forecasting, cooking, and scientific applications. 100% free with no registration required.
Conversion Formula
°F = (°C × 9/5) + 32
To convert Celsius to Fahrenheit:
Fahrenheit = (Celsius × 1.8) + 32
Example: 25°C × 1.8 + 32 = 77°F
Celsius to Fahrenheit Conversion Table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| -40°C | -40°F |
| -20°C | -4°F |
| 0°C | 32°F |
| 10°C | 50°F |
| 15°C | 59°F |
| 20°C | 68°F |
| 25°C | 77°F |
| 30°C | 86°F |
| 37°C | 98.6°F |
| 40°C | 104°F |
| 100°C | 212°F |
Practical Examples
- Freezing point of water: 0°C = 32°F
- Room temperature: 20°C = 68°F
- Human body temperature: 37°C = 98.6°F
- Boiling point of water: 100°C = 212°F
Professional Applications
- Meteorology: Weather forecasting and climate data analysis
- Cooking: Recipe temperature conversions and food safety
- Medicine: Body temperature monitoring and treatment protocols
- Engineering: Material testing and industrial process control
Definition and Background
What is Celsius?
The Celsius scale (°C) is a temperature scale based on 0° for the freezing point of water and 100° for the boiling point of water. Named after:
- Anders Celsius: Swedish astronomer who developed the scale in 1742
- Also known as: Centigrade scale (from Latin “centum” meaning 100)
What is Fahrenheit?
The Fahrenheit scale (°F) is a temperature scale where water freezes at 32°F and boils at 212°F. It was developed in 1724 by:
- Daniel Gabriel Fahrenheit: German-Dutch physicist
- Originally based on: Three reference points including human body temperature
Temperature Scale Comparison
| Reference Point | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| Absolute Zero | -273.15°C | -459.67°F |
| Water Freezes | 0°C | 32°F |
| Room Temperature | 20°C | 68°F |
| Human Body | 37°C | 98.6°F |
| Water Boils | 100°C | 212°F |
Frequently Asked Questions
Why do some countries use Celsius while others use Fahrenheit?
Most countries use Celsius as part of the metric system, while the United States primarily uses Fahrenheit. This stems from historical adoption of different measurement systems.
Which temperature scale is more accurate?
Both scales are equally accurate for measuring temperature. Celsius is more convenient for scientific work due to its 100-degree span between water’s freezing and boiling points.
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit are equal at -40 degrees (-40°C = -40°F).
Why is Fahrenheit still used in the United States?
The US has historically used the Imperial system, and changing temperature scales would require widespread cultural and infrastructure adjustments.