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CalcWolf Everyday Life Convertisseur Celsius - Fahrenheit
Everyday Life

Convert Celsius ↔ Fahrenheit

Convert temperatures between Celsius and Fahrenheit instantly. Includes common reference points and formulas.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

Les Formules

°F = (°C × 9/5) + 32. °C = (°F - 32) × 5/9. Astuce mentale C→F : doublez et ajoutez 30. 20°C : 20×2+30 = 70°F (réel : 68°F). Le point où les deux échelles coïncident : -40° = -40° en Celsius et Fahrenheit.

Repères

Eau gèle : 0°C = 32°F. Corps humain : 37°C = 98,6°F. Jour chaud : 35°C = 95°F. Four modéré : 180°C = 350°F. Fièvre : 38°C = 100,4°F. Seuls les États-Unis, les Bahamas et quelques territoires utilisent le Fahrenheit au quotidien.

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Frequently asked questions
Comment convertir rapidement ?
C→F : doublez et ajoutez 30. 25°C : 50+30 = 80°F (réel 77°F). Précision ±2-3°F.
Quelle température est fièvre ?
38°C (100,4°F) ou plus. Au-dessus de 39,5°C (103°F) chez l'adulte : consultez un médecin.
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Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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