Temperature Converter — Celsius ↔ Fahrenheit
The exact formula is °F = (°C × 9/5) + 32 — algebraically exact with zero rounding. Type any temperature below, or browse the complete conversion charts covering 110 Celsius and 100 Fahrenheit values.
Temperature Converter
Celsius → Fahrenheit
Formula: (°C × 9÷5) + 32 — multiply by 1.8, then add 32
°C → °F exact
°F = (°C × 9/5) + 32
e.g. 37°C → (37 × 1.8) + 32 = 98.6°F
°F → °C exact
°C = (°F − 32) × 5/9
e.g. 98.6°F → (98.6 − 32) × 0.556 = 37°C
Quick mental trick
°F ≈ (°C × 2) + 30
e.g. 25°C → (25 × 2) + 30 = 80°F (exact: 77°F)
Popular Celsius to Fahrenheit Conversions
Click any card for the full step-by-step breakdown, formula, and nearby values.
Popular Fahrenheit to Celsius Conversions
Click any card for the full step-by-step breakdown, formula, and nearby values.
Common Questions About Temperature Conversion
What is the formula to convert Celsius to Fahrenheit?
The exact formula is (°C × 9/5) + 32 = °F. For example, 100°C = (100 × 9/5) + 32 = 212°F. This formula is algebraically exact — there is no rounding.
How do I convert Fahrenheit to Celsius?
To convert Fahrenheit to Celsius, use (°F − 32) × 5/9 = °C. For example, 98.6°F = (98.6 − 32) × 5/9 = 37°C (normal body temperature).
What is 37 degrees Celsius in Fahrenheit?
37°C equals exactly 98.6°F. This is normal human body temperature. Using the formula: (37 × 9/5) + 32 = 66.6 + 32 = 98.6°F.
At what temperature are Celsius and Fahrenheit the same?
Celsius and Fahrenheit are equal at −40 degrees. This is the only point where both scales intersect. You can verify: (−40 × 9/5) + 32 = −72 + 32 = −40°F.
What is 0 degrees Celsius in Fahrenheit?
0°C equals 32°F. This is the freezing point of water at standard atmospheric pressure. Using the formula: (0 × 9/5) + 32 = 32°F.
How do I convert Celsius to Fahrenheit in my head?
A quick mental math shortcut: double the Celsius temperature, subtract 10%, then add 32. For example, 20°C → 40 → 36 → 68°F (exact: 68°F). This gives accuracy within 1–2 degrees for everyday temperatures.
All Celsius to Fahrenheit Conversion Pages
Each page includes the exact result, step-by-step formula, nearby values, and a live calculator.
All Fahrenheit to Celsius Conversion Pages
Each page includes the exact result, step-by-step formula, nearby values, and a live calculator.