Temprature Converter

Convert Any Unit of Temperature

Our converter supports all major temperature scales used in everyday life, science, and engineering, including:

• Everyday use: Celsius (°C), Fahrenheit (°F)
• Scientific: Kelvin (K), Rankine (°R)
• Historical / specialty: Delisle (°De), Newton (°N), Réaumur (°Ré), Rømer (°Rø)

Whether you need to convert Celsius to Fahrenheit for a recipe, Kelvin to Celsius for a chemistry problem, or Fahrenheit to Kelvin for a physics exam, this tool has you covered.

Why Use a Temperature Converter?

Temperature scales vary by country, industry, and purpose. Most of the world uses Celsius for daily weather and cooking. The United States uses Fahrenheit. Scientists and engineers worldwide use Kelvin as the standard for thermodynamic calculations. Getting the conversion wrong — even by a few degrees — can ruin a recipe, affect a lab result, or cause a technical error.

A reliable temperature converter helps you:

• Cook with confidence — convert oven temperatures between Celsius and Fahrenheit without guessing.
• Understand weather reports — know exactly how hot or cold it is whether the forecast reads 35°C or 95°F.
• Ace science and engineering — convert between Kelvin, Celsius, and Fahrenheit for thermodynamics, chemistry, and physics.
• Work with global data — process temperature readings from international datasets, sensors, or instruments without errors.

How Accurate Is This Converter?

Our converter uses the exact, internationally accepted conversion formulas. For example:

• °F to °C: subtract 32, then multiply by 5/9
• °C to °F: multiply by 9/5, then add 32
• °C to K: add 273.15
• K to °C: subtract 273.15

Unlike simple ratio-based unit conversions, temperature conversions use offset formulas — our tool handles this automatically so you always get the right answer.

FAQs

Q: How do I convert Celsius to Fahrenheit?

A: Multiply the Celsius value by 9/5 (or 1.8), then add 32. For example, 100°C × 1.8 + 32 = 212°F. Our converter does this automatically — just enter your value and select your units.

Q: How do I convert Fahrenheit to Celsius?

A: Subtract 32 from the Fahrenheit value, then multiply by 5/9 (or 0.5556). For example, (98.6°F − 32) × 0.5556 = 37°C. This is the normal human body temperature in both scales.

Q: What is Kelvin, and why is it used in science?

A: Kelvin (K) is the SI unit of temperature used in science and engineering. Unlike Celsius or Fahrenheit, Kelvin starts at absolute zero — the lowest possible temperature, where all molecular motion stops. This makes it essential for thermodynamics, physics, and chemistry, where negative temperatures are not meaningful. Note that Kelvin does not use the degree symbol (°).

Q: What is absolute zero?

A: Absolute zero is the lowest possible temperature — 0 Kelvin, which equals −273.15°C or −459.67°F. At this point, all thermal motion in atoms theoretically stops. It has never been fully achieved in practice but has been approached extremely closely in laboratory conditions.

Q: What is the difference between Celsius and Kelvin?

A: Both Celsius and Kelvin use the same scale size — one degree Celsius equals one Kelvin. The only difference is their starting point. Celsius starts at the freezing point of water (0°C), while Kelvin starts at absolute zero (0 K = −273.15°C).

Q: What is Rankine, and when is it used?

A: Rankine (°R) is an absolute temperature scale based on Fahrenheit degrees, used mainly in thermodynamic engineering in the United States. Like Kelvin, it starts at absolute zero, but uses Fahrenheit-sized degrees. 0°R = 0 K = −273.15°C = −459.67°F.

Q: What units does the temperature converter support?

A: Our tool supports Celsius, Fahrenheit, Kelvin, Rankine, Delisle, Newton, Réaumur, and Rømer. More units may be added based on user feedback.

Q: Is this temperature converter free to use?

A: Yes — completely free, with no account required. Use it as many times as you like, on any device.

Q: Can I use this tool on my phone?

A: Absolutely. Our temperature converter is fully responsive and works on smartphones, tablets, and desktop computers.

Q: Why can’t I just multiply temperature values like other unit conversions?

A: Most unit conversions use simple multiplication because the zero point is the same in both scales. Temperature scales have different zero points (offset origins), so converting between them requires both multiplication and addition or subtraction. Our converter handles this automatically using the exact formulas.