Question 1

How do I convert Fahrenheit to Celsius?

Accepted Answer

Formula: °C = (°F - 32) × 5/9. For example, 98.6°F (body temperature) = (98.6 - 32) × 5/9 = 37°C. A quick estimate: subtract 30 and halve it. Example: 70°F → (70-30)/2 = 20°C (close to the actual 21.1°C).

Question 2

How do I convert Celsius to Fahrenheit?

Accepted Answer

Formula: °F = (°C × 9/5) + 32. For example, 100°C = (100 × 9/5) + 32 = 180 + 32 = 212°F. Common benchmarks: 0°C = 32°F, 20°C = 68°F, 37°C = 98.6°F, 100°C = 212°F.

Question 3

What is absolute zero?

Accepted Answer

Absolute zero is 0 Kelvin = -273.15°C = -459.67°F. It's the theoretically coldest possible temperature — the point at which atomic motion stops. It's impossible to actually reach absolute zero, though scientists have gotten extremely close.

Question 4

At what temperature are Celsius and Fahrenheit the same?

Accepted Answer

Celsius and Fahrenheit are equal at -40°. (-40°C = -40°F). This is a useful fact for quick mental conversions at very cold temperatures.

Question 5

Which countries use Fahrenheit?

Accepted Answer

The United States, its territories, and a handful of other countries use Fahrenheit for everyday temperatures. The rest of the world uses Celsius (the metric standard). Scientists globally use Kelvin as the base temperature unit in thermodynamics.

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