Temperature Converter
Calculate your Convert temperature in seconds with the free Temperature Converter. No registration needed.
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What is a Temperature Converter?
A Temperature Converter is a free online tool that converts temperature values between Celsius, Fahrenheit, and Kelvin scales. It is useful for cooking, science, travel, and weather comparisons across different countries and fields.
How to calculate temperature conversion manually (the formula)
To convert Celsius to Fahrenheit: multiply by 9/5 and add 32 (°F = °C × 9/5 + 32). To convert Fahrenheit to Celsius: subtract 32 and multiply by 5/9 (°C = (°F − 32) × 5/9). To convert Celsius to Kelvin: add 273.15 (K = °C + 273.15).
Example calculation
Convert 25°C to Fahrenheit: (25 × 9/5) + 32 = 45 + 32 = 77°F. Convert 98.6°F to Celsius: (98.6 − 32) × 5/9 = 66.6 × 5/9 = 37°C. Convert 0°C to Kelvin: 0 + 273.15 = 273.15 K.
Common mistakes
- Forgetting the order of operations — For Celsius to Fahrenheit, multiply first, then add 32. Doing addition before multiplication gives a wrong result.
- Using the wrong formula direction — Applying the Celsius-to-Fahrenheit formula when going from Fahrenheit to Celsius (or vice versa) produces an incorrect conversion.
- Confusing Kelvin with Celsius — Kelvin does not use the degree symbol. Water freezes at 273.15 K, not 0 K.
Frequently asked questions
What is a Temperature Converter?
A Temperature Converter is a tool that converts temperature readings between Celsius, Fahrenheit, and Kelvin scales.
How do I convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 and add 32: °F = (°C × 9/5) + 32.
What is the formula for Fahrenheit to Celsius?
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and multiply by 5/9: °C = (°F − 32) × 5/9.
How do I convert Celsius to Kelvin?
To convert Celsius to Kelvin, add 273.15 to the Celsius temperature: K = °C + 273.15.
At what temperature are Celsius and Fahrenheit equal?
Celsius and Fahrenheit are equal at −40 degrees. −40°C = −40°F.