Convert Fahrenheit to Celsius instantly using the correct formula: subtract 32 first, then multiply by five ninths. The order matters, and because the scales start at different zero points, a plain multiplier gives the wrong answer, which is the usual mistake. This tool does it properly, so 98.6 degrees Fahrenheit correctly becomes 37 degrees Celsius. Use it for American weather reports, US recipes and oven settings, body temperature, and physics problems. Type any Fahrenheit value, including negatives, and the Celsius result updates live as you type, with decimals for precision. Because it runs entirely in your browser, the conversion is immediate, nothing you enter is uploaded, and the tool remains usable even without an internet connection after the first load.