Temperature Converter

Convert temperatures instantly between Celsius, Fahrenheit, and Kelvin scales with scientific accuracy

°C

Enter a temperature value and select a unit to see instant conversions

Understanding Temperature Conversion

Temperature conversion is essential for scientists, travelers, cooks, and students working across different measurement systems. Our free online temperature converter makes it simple to convert between Celsius (°C), Fahrenheit (°F), and Kelvin (K) scales instantly, with precision accurate to two decimal places.

The Three Temperature Scales Explained

Celsius (Centigrade): Used globally as the standard metric temperature scale, Celsius sets water's freezing point at 0°C and boiling point at 100°C at sea level. Most countries use Celsius for weather forecasts, cooking, and everyday temperature measurements.

Fahrenheit: Primarily used in the United States, Fahrenheit places water's freezing point at 32°F and boiling point at 212°F. While less common internationally, understanding Fahrenheit conversion is crucial for anyone working with American recipes, weather data, or scientific literature from the US.

Kelvin: The SI base unit for temperature in scientific work, Kelvin starts at absolute zero (0 K), the coldest possible temperature where molecular motion stops. Scientists prefer Kelvin for physics and chemistry calculations because it has no negative values and relates directly to molecular kinetic energy.

Quick Temperature Conversion Formulas

Our calculator uses these precise formulas for instant temperature conversions:

  • Celsius to Fahrenheit: °F = (°C × 9/5) + 32
  • Fahrenheit to Celsius: °C = (°F - 32) × 5/9
  • Celsius to Kelvin: K = °C + 273.15
  • Kelvin to Celsius: °C = K - 273.15
  • Fahrenheit to Kelvin: K = (°F - 32) × 5/9 + 273.15
  • Kelvin to Fahrenheit: °F = (K - 273.15) × 9/5 + 32

Common Temperature Conversions

Here are frequently converted temperature values across all three scales: Room temperature (20°C = 68°F = 293.15K), body temperature (37°C = 98.6°F = 310.15K), water freezing point (0°C = 32°F = 273.15K), and water boiling point (100°C = 212°F = 373.15K). Our temperature conversion calculator handles these and any custom values instantly with scientific precision.

Why Use Our Temperature Converter?

Whether you're a student studying thermodynamics, a chef following international recipes, a traveler checking weather forecasts abroad, or a scientist conducting experiments, accurate temperature conversion is essential. Our tool provides instant, reliable conversions between all three major temperature scales, eliminates calculation errors, works on any device without installation, and includes safety checks to prevent impossible values below absolute zero.

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Frequently Asked Questions

How do I convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, multiply the temperature by 9/5 (or 1.8) and add 32. For example, 25°C equals (25 × 9/5) + 32 = 77°F. Our temperature converter handles this calculation instantly for you with perfect accuracy.
How do I convert Fahrenheit to Celsius?
To convert Fahrenheit to Celsius, subtract 32 from the temperature and multiply by 5/9 (or 0.5556). For example, 77°F equals (77 - 32) × 5/9 = 25°C. Simply enter your Fahrenheit value in our converter and get instant results.
What is the Kelvin temperature scale?
Kelvin is the scientific temperature scale used in physics and chemistry, starting at absolute zero (0 K = -273.15°C = -459.67°F). Unlike Celsius and Fahrenheit, Kelvin has no negative values and is the SI base unit for temperature measurement in scientific work.
How do I convert Celsius to Kelvin?
Converting Celsius to Kelvin is straightforward: simply add 273.15 to the Celsius temperature. For example, 25°C equals 25 + 273.15 = 298.15 K. Our temperature conversion calculator performs this calculation automatically with two decimal precision.
What is absolute zero in different temperature scales?
Absolute zero, the lowest possible temperature, is 0 Kelvin (K), -273.15 degrees Celsius (°C), or -459.67 degrees Fahrenheit (°F). At this temperature, all molecular motion theoretically stops. Our converter prevents values below absolute zero to maintain scientific accuracy.
Which countries use Fahrenheit vs Celsius?
Most countries worldwide use Celsius (also called Centigrade) as their standard temperature scale. Only a few countries, including the United States, Bahamas, Belize, Cayman Islands, and Palau, primarily use Fahrenheit for everyday temperature measurements. Scientists globally use Celsius and Kelvin.
Is this temperature converter accurate for scientific use?
Yes, our temperature conversion tool uses precise formulas and rounds to two decimal places for accuracy. It handles all standard conversions between Celsius, Fahrenheit, and Kelvin scales, making it suitable for both everyday use and scientific calculations in chemistry, physics, and meteorology.
Can I convert negative temperatures?
Yes, you can convert negative temperatures in Celsius and Fahrenheit. However, Kelvin values cannot be negative since 0 K is absolute zero. Our converter will show an error if you try to enter a temperature below absolute zero on any scale to ensure accurate results.

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