Convert Celsius to Fahrenheit instantly, using the exact conversion formula for accurate results.
To convert a temperature reading from Celsius (°C) to Fahrenheit (°F), multiply the Celsius value by 9/5 (or 1.8) and then add 32 to account for the freezing point baseline differe...
Learn the physical fundamentals of temperature scales, common temperature benchmarks, oven baking conversions, and mental calculation shortcuts.
Quick reference values for everyday weather, cooking, and health.
The Celsius (°C) scale (developed by Anders Celsius in 1742) is a metric scale that divides the span between water's freezing and boiling points into exactly 100 equal degrees.
The Fahrenheit (°F) scale (created by Daniel Gabriel Fahrenheit in 1724) sets freezing at 32°F and boiling at 212°F, creating a 180-degree interval. Thus, 1°C step equals 1.8°F step.
To quickly approximate Celsius to Fahrenheit in your head without a calculator:
Double the Celsius number, subtract 10%, and add 32.
Example for 20°C: Double = 40 → Subtract 10% (4) = 36 → Add 32 = 68°F (Exact match!).
Fahrenheit is calculated by multiplying the Celsius value by 9/5 (1.8) and then adding 32, written as F = (C x 9/5) + 32. Reversing the formula to solve for Celsius gives C = (F - 32) / 1.8, which is exactly how the companion Fahrenheit to Celsius Converter works.
Water freezes at 0 degrees Celsius but at 32 degrees Fahrenheit, and boils at 100 degrees Celsius versus 212 degrees Fahrenheit. Fahrenheit spreads that same temperature range across 180 degrees instead of 100, so each Celsius degree equals 1.8 Fahrenheit degrees and the +32 offset lines up the two freezing points.
Convert 25 degrees Celsius by first multiplying 25 by 1.8 to get 45, then adding 32 for a final result of 77 degrees Fahrenheit. The two scales intersect at only one point, -40 degrees, where -40C equals -40F exactly.
This tool is useful for reading international weather forecasts, converting oven temperatures in recipes, and checking body temperature readings against the 98.6F (37C) healthy baseline. Use the Fahrenheit to Celsius Converter for the reverse direction, or the Length Converter and Weight Converter when a trip or recipe needs other unit conversions too.
Quick answers about how this tool works.
37°C is equal to 98.6°F, which represents the standard average healthy human body temperature.
0°C is equal to 32°F, which is the freezing point of pure water at standard atmospheric pressure.
100°C is equal to 212°F, which is the boiling point of pure water at sea level.
Celsius and Fahrenheit scales intersect and are equal at -40°. That means -40°C is equal to -40°F.
The number 32 accounts for the different freezing point baselines of water. Water freezes at 0° on the Celsius scale, but at 32° on the Fahrenheit scale.
20°C is equal to 68°F, which is generally considered standard room temperature.
Plain-language explainers that sit next to this tool.
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