Which formula converts Celsius to Fahrenheit?

Which formula converts Celsius to Fahrenheit?

• A. Fahrenheit = (C × 9/5) + 32
• B. Celsius = (F − 32) × 5/9
• C. Kelvin = Celsius + 273.5
• D. Celsius = Fahrenheit × 9/5

Answer: (A)

To convert Celsius to Fahrenheit, multiply the Celsius value by 9/5 and then add 32. The 9/5 factor comes from how the Fahrenheit and Celsius scales line up: water freezes at 32°F and boils at 212°F, which is a 180-degree span on the Fahrenheit scale, matching a 100-degree span on the Celsius scale. So F = (C × 9/5) + 32. For example, 0°C equals 32°F, and 100°C equals 212°F, which confirms the relationship; 25°C becomes 77°F. The other formulas don’t convert Celsius to Fahrenheit: one formula finds Celsius from Fahrenheit, another converts Celsius to Kelvin, and the last one is simply not the correct way to map Celsius to Fahrenheit.

To convert Celsius to Fahrenheit, multiply the Celsius value by 9/5 and then add 32. The 9/5 factor comes from how the Fahrenheit and Celsius scales line up: water freezes at 32°F and boils at 212°F, which is a 180-degree span on the Fahrenheit scale, matching a 100-degree span on the Celsius scale. So F = (C × 9/5) + 32. For example, 0°C equals 32°F, and 100°C equals 212°F, which confirms the relationship; 25°C becomes 77°F.

The other formulas don’t convert Celsius to Fahrenheit: one formula finds Celsius from Fahrenheit, another converts Celsius to Kelvin, and the last one is simply not the correct way to map Celsius to Fahrenheit.