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25 °C = 77 °F
Celsius → Fahrenheit
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Formulas: precise, includes offsets and scales where required.

All Units (live)

Conversions shown relative to Celsius
Temperature Conversion Tool
Use our free Temperature Conversion Calculator to instantly convert between Celsius (°C), Fahrenheit (°F), Kelvin (K) and Rankine (°R). Whether you need to adjust for weather, science experiments, engineering projects, or daily life, this tool provides accurate and instant temperature conversions.

Temperature conversion refers to changing a temperature reading from one unit to another. Temperature is a physical quantity that measures the degree of hotness or coldness of a body or environment. Common temperature units include:

  • Celsius (°C) – Used worldwide for daily weather, cooking and scientific purposes.
  • Fahrenheit (°F) – Common in the United States and some Caribbean countries.
  • Kelvin (K) – SI unit of temperature, widely used in scientific and engineering applications.
  • Rankine (°R) – Primarily used in thermodynamic and engineering systems.

For example: 0 °C = 32 °F = 273.15 K = 491.67 °R. Instead of memorizing formulas, our tool converts instantly.

Converting temperatures is simple with our online temperature converter. Just follow these steps:

  • Step 1: Enter the temperature value in the input box.
  • Step 2: Select the unit you want to convert from (e.g., °C, °F, K).
  • Step 3: Choose the unit you want to convert to (e.g., °R, °F, °C).
  • Step 4: Click the “Convert” button.
  • Step 5: Get instant, accurate results on your screen.

No formulas, no confusion — just accurate temperature conversions in seconds.

Here are the key temperature units and their relationships:

  • Celsius (°C): 0 °C = freezing point of water; 100 °C = boiling point.
  • Fahrenheit (°F): 32 °F = freezing point; 212 °F = boiling point.
  • Kelvin (K): Absolute temperature scale starting from absolute zero (0 K).
  • Rankine (°R): Similar to Kelvin but measured in Fahrenheit increments.

Quick examples:

  • 0 °C = 32 °F = 273.15 K
  • 100 °C = 212 °F = 373.15 K
  • -40 °C = -40 °F

Manually converting between Celsius, Fahrenheit, Kelvin and Rankine can be time-consuming and error-prone. Our calculator is useful for:

  • Students studying physics, chemistry and thermodynamics.
  • Engineers and scientists needing accurate unit conversions.
  • Travelers comparing temperatures across countries.
  • Everyday users checking weather forecasts or cooking recipes.
  • Instant conversion between Celsius, Fahrenheit, Kelvin and Rankine.
  • Simple interface for quick and accurate results.
  • 100% free to use — no downloads or registration required.
  • Accessible on all devices including mobile, tablet and desktop.
  • Reliable for both everyday and professional use.

Yes, your privacy is fully protected. The Temperature Conversion Tool does not collect, store, or share any data. All conversions happen instantly in your browser, ensuring security and accuracy.