Temperature Converter
Celsius, Fahrenheit, and Kelvin
Formula & steps
°F = (°C × 9/5) + 32
°F = (°C × 9/5) + 32 °F = (25 × 9/5) + 32 °F = 45 + 32 °F = 77
Common values
Engineering examples
These values are common engineering examples (datasheet corners, room temperature, and high-temperature ratings). They are not a universal operating-temperature rating for every electronic component.
Natural-language input accepted: 25C, -40 F, 300K. English-first calculator; labels stay in SI notation.
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Quick Answer
°F = (°C × 9/5) + 32. °C = (°F - 32) × 5/9. K = °C + 273.15. The scales cross at -40° (where °C = °F). Water freezes at 0°C / 32°F / 273.15K and boils at 100°C / 212°F / 373.15K.
Calculateur de Conversion de Temperature
Convertissez entre Celsius, Fahrenheit et Kelvin.
Design Notes
Electronics datasheets use Celsius exclusively. Standard operating ranges: commercial (0-70°C), industrial (-40 to 85°C), automotive (-40 to 125°C). Junction temperature is the most critical thermal parameter for IC reliability. Common corner values such as -55°C or 125°C are examples, not a universal rating for every part.
Common Mistakes
- 1
Forgetting the offset in Celsius-Fahrenheit conversion — it is NOT a simple multiplication.
- 2
Using ° symbol with Kelvin — correct notation is simply K, not °K.
- 3
Confusing temperature difference with absolute temperature — a 10°C rise = 18°F rise, but 10°C = 50°F.
Knowledge Base
Comment convertir °C en °F ?
°F = °C × 9/5 + 32. Inversement : °C = (°F − 32) × 5/9. Points de repère : 0 °C = 32 °F (glace), 100 °C = 212 °F (ébullition), 25 °C = 77 °F (ambiante).
Qu'est-ce que le kelvin en électronique ?
Le kelvin (K) est l'unité SI de température. K = °C + 273,15. Utilisé pour les calculs de bruit thermique (kT), les jonctions semi-conductrices et les coefficients de température (TCR en ppm/K).