Temperature Converter
Convert any temperature unit quickly and accurately. Whether you need to convert Celsius to Fahrenheit, Kelvin to Rankine, or check the triple point of water, our tool gives you instant results, clear explanations, and helpful tables – all in one place.
How to Use the Temperature Converter
- Enter the value you want to convert.
- Select the original unit (From) and the target unit (To).
- See the result instantly, along with a human-readable explanation.
This tool supports all major temperature units: Celsius, Fahrenheit, Kelvin, Rankine, Reaumur, and the triple point of water.
Popular Temperature Conversions
| From | To | Formula |
|---|---|---|
| Celsius (°C) | Fahrenheit (°F) | (°C × 9/5) + 32 |
| Fahrenheit (°F) | Celsius (°C) | (°F − 32) × 5/9 |
| Celsius (°C) | Kelvin (K) | °C + 273.15 |
| Kelvin (K) | Celsius (°C) | K − 273.15 |
| Kelvin (K) | Fahrenheit (°F) | (K × 9/5) − 459.67 |
| Fahrenheit (°F) | Kelvin (K) | (°F + 459.67) × 5/9 |
| Celsius (°C) | Rankine (°R) | (°C + 273.15) × 9/5 |
| Rankine (°R) | Celsius (°C) | (°R − 491.67) × 5/9 |
Temperature Units Explained
What is Celsius?
The Celsius (°C) scale is based on the freezing (0°C) and boiling (100°C) points of water at standard atmospheric pressure.
What is Fahrenheit?
The Fahrenheit (°F) scale is used mainly in the United States. Water freezes at 32°F and boils at 212°F.
What is Kelvin?
The Kelvin (K) scale is the SI base unit for temperature. 0 K is absolute zero, the lowest possible temperature.
What is Rankine?
The Rankine (°R) scale is used mainly in engineering fields in the US. 0°R is absolute zero, and each degree Rankine is equal to one degree Fahrenheit.
What is Reaumur?
The Reaumur (°r) scale sets the freezing and boiling points of water to 0°r and 80°r, respectively.
What is the Triple Point of Water?
The triple point of water is the unique temperature and pressure at which water can coexist in equilibrium in all three phases (solid, liquid, gas). It is exactly 0.01°C or 273.16 K.
FAQ – Temperature Conversion
- How do I convert Celsius to Fahrenheit?
- Multiply the Celsius value by 9/5 and add 32 to get Fahrenheit.
- How do I convert Kelvin to Celsius?
- Subtract 273.15 from the Kelvin value to get Celsius.
- What is absolute zero?
- Absolute zero is the lowest possible temperature, 0 K or -273.15°C.
- Can I use this converter on my phone?
- Yes! The temperature converter is fully mobile-friendly and works on any device.
- Is this tool free?
- Absolutely. You can use this converter as much as you like – it's completely free.
- Does this converter support all temperature units?
- Yes, it supports all major temperature units.