Converter weather fahrenheit to celsius

I asked a few people and the conversion formula is the first thing that comes to mind - and how hard it is to remember. The result won't be accurate but it does provide an approximate number that's "good enough" in everyday situations. Current use: Until the 's the Fahrenheit scale was the primary scale used in English-speaking countries. Today, most countries around the world use the Celsius temperature scale instead, many having made the change during their metrication processes conversion to using the metric system of units.

However, the Fahrenheit scale is still used as the official temperature scale in a number of countries, including the United States as well as its unincorporated territories , the Bahamas, Belize, the Cayman Islands, and a few others. Similarly, to go from zero centimeters to 1 centimeter, we need only add 1 centimeter. The only difference between adding one inch or one centimetre is the amount of distance we're adding.

The relationship between an inch and a centimetre is that 1 inch is 2. So we can say that adding 1 inch is the same as adding 2. Temperature units aren't built in the same simple way, because they don't all start in the same place at zero. It's not a difficult extra step, but it seems to be something that can cause confusion. As a rough rule of thumb: To go from Fahrenheit to Celsius, take 30 off the Fahrenheit value, and then half that number.

Use the above three steps:. So the temperature in Celsius is If you want to convert a normal human body temperature As noted, your starting temperature is So you would have:. Check your answer to ensure it makes sense. At ordinary temperatures, a Celsius value is always lower than the corresponding Fahrenheit value.

Also, it's helpful to keep in mind that the Celsius scale is based on the freezing and boiling points of water, where 0 C is the freezing point and C is the boiling point. On the Fahrenheit scale, water freezes at 32 F and boils at F. You often don't need an exact conversion. If you're traveling to Europe, for example, and you know the temperature is 74 F, you might want to know the approximate temperature in Celsius.

The website Lifehacker offers this tip on making an approximate conversion:. Fahrenheit to Celsius : Subtract 30 from the Fahrenheit temperature and then divide by two. So, using the approximation formula:. If you go through the previous formula's calculations for the exact temperature, you arrive at Celsius to Fahrenheit: To reverse the approximation and convert from 22 C to Fahrenheit, multiply by two and add