This is an easy guide to convert amrican "cups" etc.  to the metric system.

Liquid measurements

• 1 tsp = 6ml
• 1 tbsp = 15ml
• 1/8 cup = 30ml
• 1/4 cup = 60ml
• 1/2 cup = 120ml
• 1 cup = 240ml

Dried ingredient measurements

• 1 tsp = 5g
• 1 tbsp = 15g
• 1oz = 28g
• 1 cup flour = 150g
• 1 cup caster sugar = 225g
• 1 cup icing sugar = 115g
• 1 cup brown sugar = 175g
• 1 cup sultanas = 200g

 

 

Butter measurements

 

• 1/8 cup = 30g
• 1/4 cup = 55g
• 1/3 cup = 75g
• 1/2 cup = 115
• 2/3 cup = 150g
• 3/4 cup = 170g1 cup = 225g

Oven temperatures conversion

 

• 275°F = 140°C or Gas Mark 1
• 300°F = 150°C or Gas Mark 2
• 325°F = 165°C or Gas Mark 3
• 350°F = 180°C or Gas Mark 4
• 375°F = 190°C or Gas Mark 5 
• 400°F = 200°C or Gas Mark 6
• 425°F = 220°C or Gas Mark 7
• 450°F = 230°C or Gas Mark 8

Liquids (and Herbs and Spices)

Liquids can be converted to liters or milliliters with the following table. Small volumes (less than about 1 fluid ounce or 2 tablespoons) of ingredients such as salt, herbs, spices, baking powder, etc. should also be converted with this table. Do not use this table to convert other non-liquid ingredients.

Volume Conversions: Normally used for liquids only
Customary quantity	Metric equivalent
1 teaspoon	5 mL
1 tablespoon or 1/2 fluid ounce	15 mL
1 fluid ounce or 1/8 cup	30 mL
1/4 cup or 2 fluid ounces	60 mL
1/3 cup	80 mL
1/2 cup or 4 fluid ounces	120 mL
2/3 cup	160 mL
3/4 cup or 6 fluid ounces	180 mL
1 cup or 8 fluid ounces or half a pint	240 mL
1 1/2 cups or 12 fluid ounces	350 mL
2 cups or 1 pint or 16 fluid ounces	475 mL
3 cups or 1 1/2 pints	700 mL
4 cups or 2 pints or 1 quart	950 mL
4 quarts or 1 gallon	3.8 L
Note: In cases where higher precision is not justified, it may be convenient to round these conversions off as follows:    1 cup = 250 mL    1 pint = 500 mL    1 quart = 1 L    1 gallon = 4 L

Weight

Weights can be converted with the following table. Note that the ounces referred to in this table are not the same as fluid ounces.

Weight Conversions
Customary quantity	Metric equivalent
1 ounce	28 g
4 ounces or 1/4 pound	113 g
1/3 pound	150 g
8 ounces or 1/2 pound	230 g
2/3 pound	300 g
12 ounces or 3/4 pound	340 g
1 pound or 16 ounces	450 g
2 pounds	900 g

Other non-liquid ingredients

Non-liquid ingredients specified in American recipes by volume (if more than about 2 tablespoons or 1 fluid ounce) should be converted to weight with the following table. If you need to convert an ingredient that isn't in this table, the safest thing to do is to measure it with a traditional measuring cup and then weigh the results with a metric scale. In a pinch, you can use the volume conversion table, above.

Weights of common ingredients in grams
Ingredient	1 cup	3/4 cup	2/3 cup	1/2 cup	1/3 cup	1/4 cup	2 Tbsp
Flour, all purpose (wheat)	120 g	90 g	80 g	60 g	40 g	30 g	15 g
Flour, well sifted all purpose (wheat)	110 g	80 g	70 g	55 g	35 g	27 g	13 g
Sugar, granulated cane	200 g	150 g	130 g	100 g	65 g	50 g	25 g
Confectioner's sugar (cane)	100 g	75 g	70 g	50 g	35 g	25 g	13 g
Brown sugar, packed firmly (but not too firmly)	180 g	135 g	120 g	90 g	60 g	45 g	23 g
Corn meal	160 g	120 g	100 g	80 g	50 g	40 g	20 g
Corn starch	120 g	90 g	80 g	60 g	40 g	30 g	15 g
Rice, uncooked	190 g	140 g	125 g	95 g	65 g	48 g	24 g
Macaroni, uncooked	140 g	100 g	90 g	70 g	45 g	35 g	17 g
Couscous, uncooked	180 g	135 g	120 g	90 g	60 g	45 g	22 g
Oats, uncooked quick	90 g	65 g	60 g	45 g	30 g	22 g	11 g
Table salt	300 g	230 g	200 g	150 g	100 g	75 g	40 g
Butter	240 g	180 g	160 g	120 g	80 g	60 g	30 g
Vegetable shortening	190 g	140 g	125 g	95 g	65 g	48 g	24 g
Chopped fruits and vegetables	150 g	110 g	100 g	75 g	50 g	40 g	20 g
Nuts, chopped	150 g	110 g	100 g	75 g	50 g	40 g	20 g
Nuts, ground	120 g	90 g	80 g	60 g	40 g	30 g	15 g
Bread crumbs, fresh, loosely packed	60 g	45 g	40 g	30 g	20 g	15 g	8 g
Bread crumbs, dry	150 g	110 g	100 g	75 g	50 g	40 g	20 g
Parmesan cheese, grated	90 g	65 g	60 g	45 g	30 g	22 g	11 g

Length

Lengths may be converted with the following table. Keep in mind that 1 cm = 10 mm and 1 inch is 25 mm

Length Conversions
Customary quantity	Metric equivalent
1/8 inch	3 mm
1/4 inch	6 mm
1/2 inch	13 mm
3/4 inch	19 mm
1 inch	2.5 cm
2 inches	5 cm
3 inches	7.6 cm
4 inches	10 cm
5 inches	13 cm
6 inches	15 cm
7 inches	18 cm
8 inches	20 cm
9 inches	23 cm
10 inches	25 cm
11 inches	28 cm
12 inches or 1 foot	30 cm