Celsius vs Fahrenheit
Fahrenheit and Celsius are linear scales with different zeros and degree sizes. Convert with F = C × 9/5 + 32. They meet at −40. Oven knobs often round the result.
Two zeros, two degree sizes
Celsius puts the freezing point of water at 0 and the boiling point at 100 (at standard pressure). Fahrenheit puts those points at 32 and 212. A Celsius degree is 1.8 Fahrenheit degrees, which is why the formula is not a simple offset. You scale by 9/5, then add 32.
The Celsius to Fahrenheit converter and the reverse page use the exact fractions. Shortcuts such as “double and add 30” turn 20°C into 70°F instead of 68°F.
Weather versus “feels like”
10°C is 50°F. 20°C is 68°F. 30°C is 86°F. Those are air temperatures. Wind chill and heat index are different calculations that mix wind, humidity and sometimes sun. Converting a “feels like 38°C” headline as if it were a thermometer reading is a category error.
Ovens round on purpose
180°C is 356°F. US boxes print 350°F. 200°C is 392°F, often labelled 400°F. If a recipe already did that rounding, converting 350°F back to 176.67°C and then picking 180°C on a metric dial is one extra hop — pick one convention and stay there, or use an oven thermometer.
Gas marks are a third scale. This site does not convert them.
Body temperature is a number, not a diagnosis
37°C is 98.6°F on the old textbook figure. 38°C is 100.4°F. Individual baselines vary. Convert the reading you have; do not treat the converter as medical advice. Length and mass conversions are separate: centimetres to inches and kilograms and pounds.
FAQ
- Why do the scales meet at −40?
Solve C = C × 9/5 + 32 and you get C = −40. It is algebra, not a weather fact.
- What is 350°F in Celsius?
176.67°C. Metric ovens usually use 175°C or 180°C as the nearest mark.
Related guides
How to Convert Centimetres to Inches
Divide centimetres by 2.54. That factor is the definition of the international inch, not a rounded classroom shortcut, so the reverse conversion lands on the same length.
Kilograms and Pounds Explained
One international pound is exactly 0.45359237 kilograms. Body-weight scales, luggage tags and gym plates use that pound — not the troy pound used for precious metals.
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