Temperature Converter

A professional temperature unit conversion tool supporting five scales: Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), and Réaumur (°Ré). Enter a value in any field and all other scales update in real time. The conversion uses standard formulas: Celsius to Fahrenheit is ×9/5+32, Celsius to Kelvin is +273.15, etc.

1. Enter a temperature value in any input field (Celsius, Fahrenheit, Kelvin, Rankine, or Réaumur). 2. All other fields update automatically as you type. 3. Use the swap button (↔) to reverse the conversion direction. 4. Click the copy icon next to any field to copy that value to your clipboard. 5. The tool works entirely in your browser — no data is sent to any server.

• Celsius (°C): Water freezes at 0°C, boils at 100°C. Used worldwide for everyday temperature. • Fahrenheit (°F): Water freezes at 32°F, boils at 212°F. Primarily used in the United States. • Kelvin (K): Absolute scale starting at absolute zero (−273.15°C). Used in scientific contexts. • Rankine (°R): Absolute Fahrenheit scale. 0°R = absolute zero. Used in some engineering fields. • Réaumur (°Ré): Historical scale where water freezes at 0°Ré and boils at 80°Ré.

All conversions go through Celsius as an intermediate: • Celsius → Fahrenheit: (C × 9/5) + 32 • Celsius → Kelvin: C + 273.15 • Celsius → Rankine: (C + 273.15) × 9/5 • Celsius → Réaumur: C × 4/5 Reverse formulas apply the inverse operations.