Temperature converter
Convert between Celsius, Fahrenheit, and Kelvin instantly. See all conversions at once with formulas, a visual thermometer, and reference temperatures.
| Reference | °C | °F | K |
|---|---|---|---|
| Absolute Zero | -273.15 | -459.67 | 0 |
| Water Freezes | 0 | 32 | 273.15 |
| Room Temperature | 22 | 71.6 | 295.15 |
| Body Temperature | 37 | 98.6 | 310.15 |
| Water Boils | 100 | 212 | 373.15 |
Click any row to load that temperature
What is Temperature Converter?
A temperature converter is a tool that translates temperature values between the three major measurement scales: Celsius, Fahrenheit, and Kelvin. Celsius (°C) is used in most of the world and in science for everyday temperatures, with 0° as water's freezing point and 100° as its boiling point. Fahrenheit (°F) is primarily used in the United States, where water freezes at 32°F and boils at 212°F. Kelvin (K) is the SI unit for thermodynamic temperature used in physics and engineering, starting at absolute zero (−273.15°C) — the coldest theoretically possible temperature. This converter handles all three scales simultaneously: enter a value in any unit and instantly see the equivalent in both other scales. It shows the exact mathematical formulas used for each conversion, displays a visual thermometer bar with color-coded temperature zones, and includes reference points like body temperature, room temperature, and water phase changes. All calculations run entirely in your browser with no server interaction.
How to Use Temperature Converter
- 1
Enter a temperature value
Type any number into the temperature input field. Select the unit you are converting from — Celsius (°C), Fahrenheit (°F), or Kelvin (K) — using the unit selector buttons. The converter accepts negative numbers, decimals, and extreme values.
- 2
Read the converted results
The results section immediately displays the equivalent temperature in the other two scales. Each result shows the numeric value, unit symbol, and scale name. Use the copy button next to any result to copy it to your clipboard.
- 3
Use references and the visual scale
The temperature bar shows where your value falls on a color-coded scale from absolute zero to boiling water. Below the bar, the reference temperatures table lists common benchmarks — click any row to load that temperature into the converter.
Features
- Converts between Celsius, Fahrenheit, and Kelvin simultaneously
- Real-time conversion updates as you type with no delay
- Shows the exact mathematical formula used for each conversion
- Visual temperature bar with gradient coloring from cold to hot
- Color-coded zone labels: Extreme Cold, Freezing, Cold, Comfortable, Warm, Hot, Extreme Heat
- Reference temperature table with absolute zero, water freeze/boil, body temp, and room temp
- One-click copy buttons on every converted value
- Runs 100% in your browser — no data sent to any server
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