Celsius to Fahrenheit (°C to °F) Converter & Chart
Locked °C → °F calculator with formula, steps, and 0–100°C table
Direction locked to °C → °F
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.
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Quick Answer
°F = (°C × 9/5) + 32. 0°C = 32°F, 20°C = 68°F, 37°C = 98.6°F, 100°C = 212°F. Double Celsius and add 30 only as a rough indoor estimate.
Celsius to Fahrenheit Converter
This page is only °C → °F. Enter Celsius above; Fahrenheit updates immediately.
Formula
°F = (°C × 9/5) + 32
The 9/5 term stretches a Celsius degree onto the smaller Fahrenheit degree. The +32 shifts the zero from water’s freezing point to the Fahrenheit zero.
Worked examples
| °C | Steps | °F |
|---|---|---|
| 0 | (0 × 1.8) + 32 | 32 |
| 20 | (20 × 1.8) + 32 = 36 + 32 | 68 |
| 37 | (37 × 1.8) + 32 = 66.6 + 32 | 98.6 |
| 100 | (100 × 1.8) + 32 | 212 |
| −40 | (−40 × 1.8) + 32 = −72 + 32 | −40 |
| 180 | (180 × 1.8) + 32 | 356 |
0–100°C chart (step 10°C)
| °C | °F |
|---|---|
| 0 | 32 |
| 10 | 50 |
| 20 | 68 |
| 30 | 86 |
| 40 | 104 |
| 50 | 122 |
| 60 | 140 |
| 70 | 158 |
| 80 | 176 |
| 90 | 194 |
| 100 | 212 |
Need every 5°C row? Use the Temperature Conversion Chart.
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Related
- Reverse: Fahrenheit to Celsius
- Why the equation looks like this: Celsius to Fahrenheit Formula
- All three scales: Temperature Converter
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.
Engineering Handbox
°F = (°C × 9/5) + 32 °F = (25 × 1.8) + 32 °F = 45 + 32 = 77
Knowledge Base
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32. Example: 30°C → 54 + 32 = 86°F.
What is 0 to 100°C in Fahrenheit?
0°C = 32°F and 100°C = 212°F. Each 10°C step is 18°F: 10°C = 50°F, 20°C = 68°F, 30°C = 86°F.
How do I go the other way?
Use °C = (°F − 32) × 5/9 or open the Fahrenheit to Celsius converter.