Tuesday, December 18, 2012
Converting to and from metric!
TEMPERATURE - FAHRENHEIT AND CELSIUS
I'm Canadian, so I use Celsius as my temperature measurement. The general rule I learned about converting from Fahrenheit was to subtract 32 and divide by 2. To find Fahrenheit you can double it and add thirty.
20˚C would be doubled and add 30 - about 70˚F. It's actually 68˚F, but we got close.
70˚F would be subtract 30 and divide by 2 - about 20˚C. It's actually 21.1˚C, but again close enough.
If you want to be really accurate, check out this conversion site or memorize these formulas!
˚C = F - 32/1.8 (Fahrenheit minus 32, then divide by 1.8)
˚F = C x 1.8 +32 (Celsius times 1.8, then add 32)
WEIGHT - GRAMS AND OUNCES
An ounce is about 28.35 grams by weight. We work in grams for bath & body products because it's easy to convert from percentages to grams - just substitute the % for the word grams and you have a recipe! You can do this with weighed ounces, but substituting the word "ounce" for % in the example below would result in a massive batch of lotion - about 100 ounces - whereas doing that with grams will result in a batch of about 100 grams, or about 3.5 ounces! Big difference, eh?
If you want to make more of something, just multiply the grams by the amount you want and you've got a larger batch! (I have already written a post on this topic, which I definitely suggest you read if you want more detail!)
Click on the picture to see the entire thing. I'm not sure why it's not coming up properly!
You have to love the highlighted possible spelling error, eh? I should have caught that before I captured the picture. Oh well!
How to convert recipes from percentages to weights!
Weight vs volume
Doubling, tripling, and quadrupling our recipes!