Celsius to Fahrenheit | °C to °F Converter
The Celsius to Fahrenheit Converter shows the equivalent temperature on the other scale using the standard formula °F = (°C × 9/5) + 32. It’s handy whenever temperatures are presented in a unit you don’t use daily—checking international weather, setting an oven from a recipe, tuning HVAC, traveling, or working through science problems.
This tool lets you quickly translate a value between °C and °F, keeping precision consistent so the number is practical, not guesswork. The goal is fast, reliable conversion that removes mental math—helping you verify a forecast, calibrate cooking temperatures, or compare climate data with confidence. Enter a temperature to get the converted result instantly.
Convert Celsius (°C) to Fahrenheit (°F) live — with formulas, quick references, and examples.
Convert °C ↔ °F
Converted temperatures
How we computed your conversion
Results interpretation: who our converter helps
- Travel & weather: quickly understand local forecasts in °F or °C while abroad.
- Cooking & baking: convert oven temps and recipes written in the other scale.
- Science & education: check lab notes and textbook examples with exact steps.
Use cases & examples
Example 1 — Comfortable room: 20 °C → 68.0 °F
Example 2 — Body temperature: 37 °C → 98.6 °F
Example 3 — Winter day: −10 °C → 14.0 °F
How our °C to °F conversion works
Formula, steps & assumptions
Relationship: The Fahrenheit scale starts at 32 for water’s freezing point and 212 at boiling, while Celsius uses 0 and 100. That fixed offset (+32) and scale factor (9/5) define the conversion.
°C → °F: °F = (°C × 9/5) + 32
°F → °C: °C = (°F − 32) × 5/9
Rounding: We present the result to your chosen number of decimals for readability.
Limitations: The formulas are exact, but thermometers and sensors have tolerance and calibration error; consider that when precision matters.
Understanding °C and °F: context, shortcuts, and practical tips
We built our converter to make temperature comparisons effortless in everyday life. Whether we’re reading a forecast, checking an oven dial, or reviewing lab notes, the two scales can feel distant until we anchor a few memorable points and use quick mental checks.
Anchor points you’ll actually use
Water freezes at 0 °C and 32 °F. It boils at 100 °C and 212 °F. A comfortable room sits around 20–22 °C (68–72 °F). Human body temperature is about 37 °C (98.6 °F).
Mental math that’s good enough
A simple rule of thumb: double °C and add 30. It’s not exact, but for quick checks it gets close to the true conversion (which multiplies by 1.8 and adds 32). For example, 25 °C → 25×2+30 = 80 °F, while the exact value is 77 °F.
Why the scales look mismatched
Fahrenheit was historically pegged to a mixture’s freezing behavior and human-centric references, while Celsius was set relative to water. The offset creates the 32-degree difference at freezing and the 180 vs 100 interval between freezing and boiling.
Practical accuracy
For cooking and weather, one decimal (or none) is plenty. In labs, calibration and repeatability matter more than the specific scale. Our converter lets us pick the displayed precision, but the underlying formulas are exact.
Common pitfalls
- Forgetting the +32 when going from °C to °F.
- Rounding too early in multi-step calculations.
- Mixing up negative temperatures—apply the offset first, then scale.
Everyday examples
A recipe calling for 200 °C corresponds to 392 °F. A chilly morning at 5 °C is 41 °F. An outdoor sauna at 90 °C is a toasty 194 °F.
Update the inputs above any time—we’ll keep the arithmetic precise so we can focus on decisions, not math.
How to convert Celsius to Fahrenheit (and back)
- Enter a temperature in either Celsius (°C) or Fahrenheit (°F).
- Choose your preferred Decimals (0–3) for display precision.
- Read the converted value in the other scale instantly—no button needed.
- Use Copy link with inputs to save/share the exact conversion and settings.
Formulas
- °C → °F:
°F = (°C × 9/5) + 32 - °F → °C:
°C = (°F − 32) × 5/9
Tip: For quick mental math from °C to °F, double and add ~30 (approximation). For example, 25 °C → 25×2+30 ≈ 80 °F.
Celsius ↔ Fahrenheit — FAQ
What is 20 °C in Fahrenheit?
20 °C = 68 °F.
Is 37 °C a fever in Fahrenheit?
37 °C converts to 98.6 °F, which is typical body temperature (~98.6 °F).
What’s the formula to convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. Multiply by 1.8, then add 32.
How do we convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. Subtract 32, then scale by 5/9.
Why are the scales offset by 32?
Fahrenheit’s freezing point for water is 32 while Celsius is 0. The offset aligns those reference points.
How many decimals should we use?
For weather and cooking, 0–1 decimals are fine. Use more only when higher precision is required.
What’s a fast mental estimate from °C to °F?
Double °C and add ~30. It’s a quick approximation that’s close to the exact (×1.8 + 32).
Do the formulas change at negative temperatures?
No, the same equations apply across the full range.