Celsius to Fahrenheit Converter
°F = (°C × 9/5) + 32 — convert any temperature instantly
Celsius to Fahrenheit Formula
To convert Celsius to Fahrenheit, multiply the temperature by 9/5 (or 1.8) then add 32. To go the other way, subtract 32 then divide by 1.8.
Quick estimate: Double the Celsius value and add 30. Example: 20°C → 20×2+30 = 70°F (actual: 68°F). Works best between -10°C and 40°C.
Key reference temperatures
| Temperature | °C | °F |
|---|---|---|
| Absolute zero | -273.15°C | -459.67°F |
| Celsius/Fahrenheit equal | -40.0°C | -40.0°F |
| Water freezes | 0°C | 32°F |
| Cold winter day | -10°C | 14°F |
| Fridge temperature | 4°C | 39.2°F |
| Cool room | 16°C | 60.8°F |
| Room temperature | 20°C | 68°F |
| Warm day | 25°C | 77°F |
| Body temperature | 37°C | 98.6°F |
| Hot summer day | 40°C | 104°F |
| Water boils (sea level) | 100°C | 212°F |
Temperature Conversion Chart
Click any row to load the temperature into the converter above:
| °C | °F | Kelvin | Description |
|---|---|---|---|
| -40°C | -40°F | 233.15 K | Celsius = Fahrenheit |
| -20°C | -4°F | 253.15 K | Very cold winter |
| -10°C | 14°F | 263.15 K | Cold winter day |
| 0°C | 32°F | 273.15 K | Water freezing point |
| 5°C | 41°F | 278.15 K | Fridge temperature |
| 10°C | 50°F | 283.15 K | Cold spring day |
| 15°C | 59°F | 288.15 K | Cool day |
| 20°C | 68°F | 293.15 K | Room temperature |
| 25°C | 77°F | 298.15 K | Warm room / mild day |
| 30°C | 86°F | 303.15 K | Hot day |
| 35°C | 95°F | 308.15 K | Very hot |
| 37°C | 98.6°F | 310.15 K | Body temperature |
| 40°C | 104°F | 313.15 K | Fever |
| 50°C | 122°F | 323.15 K | Heat wave |
| 100°C | 212°F | 373.15 K | Water boiling point |
| 200°C | 392°F | 473.15 K | Oven — low |
| 180°C | 356°F | 453.15 K | Oven — low-medium |
| 220°C | 428°F | 493.15 K | Oven — medium-high |
| 260°C | 500°F | 533.15 K | Oven — high |
How to Convert Celsius to Fahrenheit
The conversion formula is: °F = (°C × 9/5) + 32. This formula comes from the relationship between the two scales: the Fahrenheit scale has 180 degrees between freezing (32°F) and boiling (212°F), while Celsius has 100 degrees between them. So each °C equals 1.8°F, plus a 32-degree offset.
Oven temperatures: 180°C = 350°F (moderate), 200°C = 392°F (hot), 220°C = 428°F (very hot). A fan oven is usually set 20°C lower than a conventional oven.
Common oven temperatures
- 150°C / 300°F — Low / slow cook
- 175°C / 347°F — Low-moderate (baking cakes)
- 190°C / 374°F — Moderate (roasting chicken)
- 200°C / 392°F — Hot (pizza, baguettes)
- 230°C / 446°F — Very hot (searing, high-heat roast)
Why Temperature Conversion Matters
- Cooking & baking — recipes from the US use °F; European recipes use °C. Getting it wrong can burn your dish.
- Medical — body temperature of 37°C (98.6°F) is normal; a fever starts around 38°C (100.4°F).
- Weather — travelers going from Europe (°C) to the US (°F) need to convert forecasts to know what to wear.
- Science — Kelvin is the SI unit, but °C and °F are used in everyday life and many technical contexts.
Frequently Asked Questions
How do you convert Celsius to Fahrenheit?
Formula: °F = (°C × 1.8) + 32. Multiply the °C value by 1.8, then add 32. Example: 100°C × 1.8 + 32 = 212°F.
What is 37°C in Fahrenheit?
37°C = 98.6°F. This is normal human body temperature.
What is 0°C in Fahrenheit?
0°C = 32°F — the freezing point of water. 0 × 1.8 + 32 = 32.
What is 100°C in Fahrenheit?
100°C = 212°F — the boiling point of water at sea level. 100 × 1.8 + 32 = 212.
At what temperature are Celsius and Fahrenheit equal?
-40° — both scales meet at -40. That's why -40°C = -40°F.
What is 20°C in Fahrenheit?
20°C = 68°F — a comfortable room temperature. 20 × 1.8 + 32 = 68.
How do you convert Fahrenheit to Celsius?
Formula: °C = (°F − 32) ÷ 1.8. Example: 98.6°F → (98.6 - 32) ÷ 1.8 = 37°C. Use the °F → °C mode above.