Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly.
Table of Contents
Common Temperature Conversions
Quick reference for frequently used temperature conversions.
| From | To | Result |
|---|---|---|
| 0°C | Fahrenheit | 32°F |
| 100°C | Fahrenheit | 212°F |
| 0°F | Celsius | -17.78°C |
| 212°F | Celsius | 100°C |
| 0°C | Kelvin | 273.15 K |
| 100°C | Kelvin | 373.15 K |
| 32°F | Kelvin | 273.15 K |
| 72°F | Celsius | 22.22°C |
How to Use Our Unit Converter
- Select the category you want to convert (Length, Weight, Temperature, Area, Volume, or Time) by clicking the corresponding tab.
- Enter your value in the "From" field.
- Select the source unit and destination unit from the dropdown menus.
- See the result instantly — no need to click any button.
- Use the swap button to reverse the conversion direction.
About Temperature Conversion
Temperature is a measure of the thermal energy of a system. The three most commonly used temperature scales are Celsius (°C), Fahrenheit (°F), and Kelvin (K).
Celsius is used in most countries for everyday temperature measurement. Fahrenheit is primarily used in the United States. Kelvin is the absolute temperature scale used in scientific contexts, where 0 K (absolute zero) represents the complete absence of thermal energy.
Key formulas: °F = (°C × 9/5) + 32, °C = (°F − 32) × 5/9, K = °C + 273.15. Water freezes at 0°C / 32°F / 273.15 K and boils at 100°C / 212°F / 373.15 K at standard atmospheric pressure.
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Use the formula: °F = (°C × 9/5) + 32. For example, 25°C = (25 × 9/5) + 32 = 77°F. Simply enter 25 in the converter, select Celsius to Fahrenheit, and get the result instantly.
How do I convert Fahrenheit to Celsius?
Use the formula: °C = (°F − 32) × 5/9. For example, 98.6°F = (98.6 − 32) × 5/9 = 37°C. Enter the Fahrenheit value, select Fahrenheit as source and Celsius as destination.
What is room temperature in Celsius and Fahrenheit?
Room temperature is typically 20–22°C (68–72°F). Comfortable living conditions range from 18°C to 24°C (64°F to 75°F) depending on personal preference and activity level.
What is normal body temperature in Celsius and Fahrenheit?
Normal body temperature is 37°C (98.6°F). However, it can range from 36.1°C to 37.2°C (97°F to 99°F) and still be considered normal. Body temperature varies throughout the day.
At what temperature does water freeze and boil?
Water freezes at 0°C (32°F) and boils at 100°C (212°F) at standard atmospheric pressure. These reference points are used to define the Celsius scale.
Which countries use Fahrenheit vs Celsius?
The United States, its territories, and a few Caribbean nations use Fahrenheit. Most of the world uses Celsius. Kelvin is used in scientific contexts. The UK uses both informally.