Convert Celsius to Fahrenheit
PrintCelsius to Fahrenheit Conversion Table
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| 0.01 °C | 32.018 °F |
| 0.1 °C | 32.18 °F |
| 1 °C | 33.8 °F |
| 2 °C | 35.6 °F |
| 3 °C | 37.4 °F |
| 5 °C | 41.0 °F |
| 10 °C | 50.0 °F |
| 20 °C | 68.0 °F |
| 50 °C | 122.0 °F |
| 100 °C | 212.0 °F |
| 1000 °C | 1832.0 °F |
Celsius and Fahrenheit are the two primary temperature scales used globally to express weather forecasts, human body temperatures, cooking instructions, and scientific data. While the Celsius (°C) scale is the official metric standard used by over 190 countries worldwide, the Fahrenheit (°F) scale remains the everyday standard in the United States, its territories, and a few Caribbean nations.
Our free online Celsius to Fahrenheit Converter provides instant, high-precision temperature conversions in both directions:
- Celsius to Fahrenheit: Multiply the Celsius temperature by
1.8(or9/5) and then add32. - Fahrenheit to Celsius: Subtract
32from the Fahrenheit temperature, then divide the result by1.8(or multiply by5/9).
Exact Temperature Conversion Formulas
Unlike length or weight conversions which only require simple multiplication, temperature scales do not share the same starting point (zero). Therefore, converting between Celsius and Fahrenheit requires both multiplication (to adjust the scale size) and addition/subtraction (to offset the differing zero points).
| Conversion Direction | Decimal Formula | Fractional Formula |
|---|---|---|
| Celsius to Fahrenheit | °F = (°C × 1.8) + 32 |
°F = (°C × 9/5) + 32 |
| Fahrenheit to Celsius | °C = (°F - 32) / 1.8 |
°C = (°F - 32) × 5/9 |
| Celsius to Kelvin (SI) | K = °C + 273.15 |
(Kelvin scale matches Celsius step-size) |
Step-by-Step Calculation Example
To explicitly convert 20° Celsius to Fahrenheit (a standard room temperature), follow the mathematical order of operations (PEMDAS): multiply first, then add.
| Math Step | Execution Logic | Calculated Value |
|---|---|---|
| Step 1: Input Celsius | Identify the starting Celsius temperature. | 20°C |
| Step 2: Multiplication | Multiply the Celsius value by 1.8. | 20 × 1.8 = 36 |
| Step 3: Final Addition | Add 32 to offset the zero point. | 36 + 32 = 68°F |
Celsius to Fahrenheit Benchmark Table
Below is a quick reference lookup chart converting vital daily, scientific, and meteorological temperatures:
| Celsius (°C) | Fahrenheit (°F) | Scientific & Daily Benchmark |
|---|---|---|
| -273.15 °C | -459.67 °F | Absolute Zero (0 Kelvin) |
| -40.0 °C | -40.0 °F | The exact point where both scales intersect |
| -18.0 °C | -0.4 °F | Standard residential freezer temperature |
| 0.0 °C | 32.0 °F | Freezing point of water |
| 10.0 °C | 50.0 °F | Cool autumn day |
| 20.0 °C | 68.0 °F | Standard comfortable room temperature |
| 30.0 °C | 86.0 °F | Hot summer day |
| 37.0 °C | 98.6 °F | Average normal human body temperature |
| 40.0 °C | 104.0 °F | Extreme heat wave / high fever |
| 100.0 °C | 212.0 °F | Boiling point of water (at sea level) |
| 180.0 °C | 356.0 °F | Standard kitchen oven baking temperature |
| 5,500 °C | 9,932 °F | Surface temperature of the Sun |
History: Anders Celsius vs. Daniel Gabriel Fahrenheit
The Origin of the Fahrenheit Scale (1724)
Developed by Polish-born German physicist Daniel Gabriel Fahrenheit, this scale was initially based on three reference points: the freezing point of an ice-water-salt mixture (0°F), the freezing point of water (32°F), and an estimate of the human body temperature (which he originally placed around 96°F, later adjusted to 98.6°F).
The Origin of the Celsius Scale (1742)
Swedish astronomer Anders Celsius developed a much simpler centigrade scale based on the properties of water. He set the interval between the freezing point and boiling point of water at precisely 100 degrees. Interestingly, Celsius originally designated 0 degrees as the boiling point and 100 degrees as the freezing point. After his death, the scale was reversed to the modern configuration we use today.
To perform reverse conversions, visit our Fahrenheit to Celsius Converter. For general unit transformations across length, volume, and mass, explore our comprehensive Conversion Calculator.
Frequently Asked Questions (FAQ)
What is 0 degrees Celsius in Fahrenheit?
0°C is equal to 32°F. This is the exact freezing point of liquid water at standard sea-level atmospheric pressure.
What is 100 degrees Celsius in Fahrenheit?
100°C is equal to 212°F. This marks the boiling point of liquid water at sea level.
Is -40 Celsius the same as -40 Fahrenheit?
Yes. The temperature -40 degrees is the exact mathematical intersection point where the Celsius and Fahrenheit scales match perfectly (-40°C = -40°F).
What is normal human body temperature?
A normal human body temperature is generally accepted as 37°C or 98.6°F, though this can vary slightly depending on the individual and the time of day.