How do I convert Celsius (°C) to Fahrenheit (°F)?

20 celsius equals 68 fahrenheit using SI-based conversion and precise factors.

What is the formula to convert Celsius (°C) to Fahrenheit (°F)?

Temperature conversions include an offset (e.g., +273.15 for K, or +/−32 with ratio 5/9 and 9/5).

Is Celsius (°C) to Fahrenheit (°F) conversion exact?

Yes, it follows an exact affine transformation between scales (ratio + offset).

How can I share a direct celsius to fahrenheit result?

Use the shareable URL: https://measurecalc.com/convert/celsius-to-fahrenheit/20

Convert Celsius (°C) to Fahrenheit (°F)

Category: Temperature

Value From To Precision

68 fahrenheit

20 celsius = 68 fahrenheit

High-precision rounding: 6 decimals

How to convert Celsius to Fahrenheit

We convert by pivoting through the SI base unit for Temperature and applying exact factors where applicable.

Share this conversion: /convert/celsius-to-fahrenheit/20

Quick conversion table

Handy values for Celsius (°C) → Fahrenheit (°F). Click a value to open that exact result.

Celsius (°C)	Fahrenheit (°F)
20	68
0.5	32.9
2.5	36.5
10	50

Conversion formula

Use the exact formula:

°F = (°C × 9/5) + 32

Temperature conversions use exact affine formulas (ratio + offset).

Common mistakes

Using only a ratio (×1.8 or ×0.555…) without adding/subtracting the offset (±32, +273.15).
Rounding too early; convert first, then round to the desired precision.

Unit facts

Celsius (°C): Celsius (°C) is an offset scale: 0 °C at water’s freezing point, 100 °C at boiling (1 atm).
Fahrenheit (°F): Fahrenheit (°F) is an offset scale: 32 °F freezing, 212 °F boiling of water (1 atm).

About Temperature

Temperature scales combine ratios and offsets. Kelvin is absolute (no negative values), Celsius offsets Kelvin by 273.15, and Fahrenheit uses a different step and zero point. Because offsets exist, temperature conversions require both a factor and an addition/subtraction.

About Celsius (°C)

Celsius (°C)

Offset scale with 0 °C at water’s freezing point and 100 °C at boiling (at 1 atm). Converts to Kelvin by adding 273.15. Widely used in daily weather and science.

History: Named for Anders Celsius (1740s). Redefined through absolute thermodynamic scales as metrology advanced.

About Fahrenheit (°F)

Fahrenheit (°F)

Offset scale with 32 °F as water’s freezing point and 212 °F as boiling at 1 atm. Offers finer granularity per degree for everyday weather reporting in the US.

History: Proposed by Daniel G. Fahrenheit in the 18th century; based on calibration points available at the time.

Related conversions from celsius

celsius → kelvin Kelvin (K)
celsius → rankine Rankine (°R)

Related conversions to fahrenheit

kelvin → fahrenheit Kelvin (K)
rankine → fahrenheit Rankine (°R)