What is the difference between Celsius, Fahrenheit, and Kelvin?

Celsius (°C) is the metric temperature scale where water freezes at 0° and boils at 100°. Fahrenheit (°F) is the imperial scale where water freezes at 32° and boils at 212°. Kelvin (K) is the absolute temperature scale used in science, starting at absolute zero (0K = -273.15°C), with no negative values.

How do I convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit, use the formula: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. This converter does the calculation automatically as you type.

How do I convert Fahrenheit to Celsius?

To convert Fahrenheit to Celsius, use the formula: °C = (°F - 32) × 5/9. For example, 68°F = (68 - 32) × 5/9 = 20°C. Simply enter the value and select the units to convert automatically.

What is Kelvin used for?

Kelvin is the SI unit of temperature used primarily in scientific and engineering applications. It starts at absolute zero (the coldest possible temperature) and has no negative values. 0K = -273.15°C. It is essential in thermodynamics, physics, and chemistry.

What is absolute zero?

Absolute zero is the lowest possible temperature, where all molecular motion stops. It is 0 Kelvin (0K), which equals -273.15°C or -459.67°F. It is theoretically impossible to reach absolute zero, but scientists have come extremely close in laboratory conditions.

Can temperatures be negative in Kelvin?

No, Kelvin cannot be negative because it starts at absolute zero (0K), the coldest possible temperature. Unlike Celsius and Fahrenheit which can have negative values, Kelvin always represents an absolute temperature above absolute zero.

What are common temperature reference points?

Common reference points include: Absolute Zero (-273.15°C / -459.67°F / 0K), Freezing Point of Water (0°C / 32°F / 273.15K), Room Temperature (~20°C / 68°F / 293K), Human Body Temperature (37°C / 98.6°F / 310K), and Boiling Point of Water (100°C / 212°F / 373K).

Temperature Converter - Celsius, Fahrenheit & Kelvin

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How to Use Temperature Converter

How to Use the Temperature Converter:

Enter Temperature Value
- Type any temperature value (positive or negative)
- Examples: 0, 37, -10, 98.6, 273.15
Select Source Unit (From)
- Celsius (°C): Metric temperature scale
- Fahrenheit (°F): Imperial temperature scale
- Kelvin (K): Absolute temperature scale
Select Target Unit (To)
- Choose which scale to convert to
- Can convert between any two scales
View Results Instantly
- Main result shows in the orange card
- All three scales displayed for reference
- Conversion happens as you type
Swap Units (Optional)
- Click "Swap Units" to reverse conversion direction
- Useful for quick back-and-forth conversions
Try Example Temperatures
- Freezing Point: 0°C = 32°F = 273.15K
- Body Temperature: 98.6°F = 37°C
- Boiling Point: 373.15K = 100°C
Reference Points Included
- Absolute Zero: -273.15°C
- Room Temperature: 20°C / 68°F
- And more common temperatures
Copy Results
- Copy button saves all conversions to clipboard
- Includes all three temperature scales

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