Convert Celsius to Fahrenheit instantly with our free online temperature converter. The formula is: °F = (°C × 9/5) + 32. The Celsius scale is used in most countries and in scientific contexts, while Fahrenheit is primarily used in the United States. Common reference points: water freezes at 0°C (32°F) and boils at 100°C (212°F). Normal body temperature is 37°C (98.6°F). A comfortable room temperature is around 20–22°C (68–72°F). Our converter also handles the reverse conversion from Fahrenheit to Celsius, and includes a reference table of common temperatures.