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Temperature Converter

Celsius to Fahrenheit and back, with the formulas and the values that come up in gas work.

Value Unit

The formulas

°F = (°C × 9/5) + 32
°C = (°F − 32) × 5/9

Temperatures worth knowing

What	Celsius	Fahrenheit
Water freezes	0 °C	32 °F
Water boils	100 °C	212 °F
Propane boils	−42 °C	−44 °F
Natural gas (methane) boils	−162 °C	−260 °F
Where the scales meet	−40 °C	−40 °F

−40 is the one people forget: it is the single point where both scales read the same, and it makes a neat exam question.

Studying for the G3 exam?

This is one of the figures the Ontario G3 exam expects you to know without reaching for a calculator. The app has 1,184 practice questions across all 9 syllabus topics, with a free 20-question mock exam.

Try the free mock exam →

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