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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

Formula

°F = (°C × 9/5) + 32। °C = (°F - 32) × 5/9। Quick C→F: double + 30। 35°C: 70+30 = 100°F (exact: 95)। India uses Celsius। Fahrenheit: US recipes, some medical (body temp 98.6°F = 37°C)।

Reference

Indian summer: 40-45°C = 104-113°F (extreme!)। Delhi winter: 2-5°C = 36-41°F। Body temp: 37°C = 98.6°F। Fever: 38°C+ = 100.4°F+।

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Frequently asked questions
Quick convert?
C→F: double + 30। 40°C: 80+30 = 110°F (exact 104)। Close enough!।
Fever?
38°C (100.4°F) or higher। Above 39.5°C: doctor visit।
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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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