Temperature Unit Converter

• Converts between 11 temperature units: Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), Réaumur (°Ré), Rømer (°Rø), Delisle (°De), Newton (°N), Gas Mark, Dreyer (°D), and Planck temperature (Tₚ).
• Units are grouped into four categories — Common, Scientific, Historical, and Engineering — so you can quickly find the scale you need.
• Type a value into any unit field and all other units update automatically in real time; no need to pick a source or target unit.
• Smart reference hints: when your input is close to a common temperature (such as water's freezing or boiling point, or human body temperature), the tool shows the matching reference.
• All calculations run locally in your browser — your data is never uploaded to any server.

1. Open the tool page; no download or installation is required.
2. Enter a value in the input box of any temperature unit, and the other units will convert and display the result instantly.
3. To start over, click "Reset All" to clear every value.
4. Read the converted result directly from the corresponding unit field (Kelvin and Rankine do not accept negative values).

• The tool is completely free and requires no registration or login.
• All conversions are performed locally in your browser; your data is never uploaded.

Free online temperature unit conversion tool, supports real-time conversion between 11 temperature units including Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, and Rømer.

Open the tool page; no download or installation is required. Enter a value in the input box of any temperature unit, and the other units will convert and display the result instantly. To start over, click "Reset All" to clear every value. Read the converted result directly from the corresponding unit field (Kelvin and Rankine do not accept negative values).

The tool is completely free and requires no registration or login. All conversions are performed locally in your browser; your data is never uploaded.

Yes, Temperature Unit Converter is completely free. No download or installation required — it runs right in your browser.