What is the Celsius to Fahrenheit conversion formula?

• A. F=(C×1.8)+32
• B. F=(C×2)+32
• C. F=(C+32)/1.8
• D. F=C/1.8+32

Answer: (A)

Converting Celsius to Fahrenheit requires scaling by 1.8 and then shifting by 32 because the Fahrenheit degree is smaller and the zero points are different. Each Celsius degree equals 1.8 Fahrenheit degrees, and water freezes at 0°C and 32°F. So you multiply C by 1.8 and then add 32: F = (C × 1.8) + 32. This matches known values like 0°C = 32°F and 100°C = 212°F. The other options mis-handle either the degree size or the offset: using a factor of 2 over-scales the temperature change; adding 32 before dividing misplaces the offset; and dividing by 1.8 after adding 32 gives the wrong slope, producing incorrect results.