Metric Units & American Units Conversion Factors

• g = grams
• kg = kilogram
• oz = ounces by weight
• fl oz = fluid ounces (by volume)
• mL = milliliter
• L = Liter
• c = cup
• qt = quart
• pt = pint
• gal = gallon
• lbs = pounds
• cm = centimeter
• in = inch
• m = meter
• mm = millimeter

• 28.35 g per oz
• 1 g per 0.035 oz 
• 1 lbs per 454 g
• 1 kg per 2.2 lbs

Fahrenheit to Celcius:

Step 1: Subtract 32 from degrees F. 

Step 2: Multiply by 5/9 (or 0.56).

Example: 80 degrees F.

Step 1: 80-32=48

Step 2: 48/1 x 5/9 = 240/9 =  26.67 degrees C.

or

Step 2: 48 x 0.56 = 26.88 degrees C.

Either way, even with the error in rounding the decimal, the difference might make 2 degrees difference but usually with rounding the error doesn't make any difference. Very few things in cooking are dependent on 1 or 2 degrees difference that it's easier to use the decimal for calculation. However, a huge exception is candy making. That 1 or 2 degrees of difference will often matter. so in that case, use the more precise method of calculating the conversion by using the fraction approach to step 2.

Celsius to Fahrenheit

Step 1: Degrees C x 1.8

Step 2: Step 1 result + 32 = Degrees F

Example: 100 Degrees C

Step 1: 100 x 1/8 = 180

Step 2: 180 + 32 = 212 Degrees F.

• 1 fl oz per 29.57 mL
• 1 mL per 0.034 fl oz
• 1 c per 237 mL
• 1 qt per 946 mL or 4 c
• 1L per 33.8 fl oz

• 1 in per 25.4 mm
• 1 cm per 0.39 in
• 1 m per 39.4 in