Respiratory Therapy – Formulas Practice Test

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards

From $25.99Unlock all

Session length

1 / 20

What is the formula to convert Fahrenheit to Celsius?

°F = (°C × 1.8) + 32

°C = (°F + 32) / 1.8

°C = (°F - 32) / 1.8

To convert Fahrenheit to Celsius, you remove the 32-degree offset and scale by 1.8. This comes from starting with F = C × 1.8 + 32 and solving for C, which gives C = (F − 32) ÷ 1.8 (or C = (F − 32) × 5/9).

So you subtract 32 from the Fahrenheit temperature, then divide by 1.8. For example, 68°F → (68 − 32)/1.8 ≈ 20°C, and 212°F → (212 − 32)/1.8 = 100°C. This also confirms the lower point: 32°F is 0°C.

The other forms mix up the operations or swap the roles of Fahrenheit and Celsius, so they don’t yield correct values in general.

°C = (°F - 32) × 1.8