Baking conversion:
1 cup bleached all-purpose flour – 4.25 ounces – 120 grams
1 cup cake flour – 4 ounces – 110 grams
1 cup unsweetened cocoa – 3.25 ounces – 92 grams
1 cup granulated sugar – 7 ounces – 200 grams
1 cup confectioners’ sugar – 4 ounces – 115 grams
1 cup light brown sugar – 7.8 ounces – 220 grams
1 cup dark brown sugar – 8.4 ounces – 240 grams
1 cup vegetable oil – 7.5 ounces – 215 grams

Eggs and Dairy Conversion
Egg: one large egg = 1.7 oz
Egg Yolk: one egg yolk = .7 oz
Butter: 1 cup = 8 oz
Milk: 1 cup = 8 oz.
Heavy Cream: 1 cup = 8.4 oz
Cream Cheese: 1 cup = 8.2 oz
Sour Cream/Yogurt: 1 cup = 8.6 oz

Oven Temperature Conversion
275 F = 140 C
300 F = 150 C
325 F = 160 C
350 F = 180 C
375 F = 190 C
400 F = 200 C
425 F = 220 C
450 F = 230 C
475 F = 250 C

U.S. Volume Equivalent Charts
1 1/2 teaspoons = 1/2 tablespoon
3 teaspoons = 1 tablespoon
2 tablespoons = 1/8 cup
4 tablespoons = 1/4 cup
8 tablespoons = 1/2 cup
1 cup = 1/2 pint
2 cups = 1 pint

Metric Volume Conversion Chart
1/8 teaspoon = .5 ml
1/4 teaspoon = 1.23 ml
1/2 teaspoon = 2.5 ml
1 teaspoon = 5 ml
1 tablespoon = 15 ml
2 tablespoons (1 ounce) = 30 ml
1/4 cup (2 ounces) = 60 ml
1/3 cup (2.67 ounces) = 75 ml
1/2 cup (4 ounces) = 120 ml
3/4 cup (6 ounces) = 180 ml
1 cup (8 ounces) = 240 ml

Metric Weight Conversion Chart
1/2 ounce = 14 grams
1 ounce = 29 grams
1 1/2 ounces = 43 grams
2 ounces = 57 grams
4 ounces = 113 grams
8 ounces = 227 grams
16 ounces (1 pound) = 454 grams

Butter equivalent conversion
⅛ cup of butter 28.4 gram 1 ounce 2 tbl.sp
¼ cup of butter 56.7 gram 2 ounce 4 tbl.sp
⅓ cup of butter 75.6 gram 2.7 ounce 5 ⅓ tbl.sp
⅜ cup of butter 85 gram 3 ounce 6 tbl.sp
½ cup of butter 113.4 gram 4 ounce 8 tbl.sp
⅝ cup of butter 141.8 gram 5 ounce 10 tbl.sp
⅔ cup of butter 151.2 gram 5.3 ounce 10 ⅔ tbl.sp
¾ cup of butter 170.1 gram 6 ounce 12 tbl.sp
⅞ cup of butter 198.5 gram 7 ounce 14 tbl.sp
1 cup of butter 226.8 gram 8 ounce 16 tbl.sp

Sources: http://www.best-ever-cookie-collection.com, http://allrecipes.com, http://www.traditionaloven.com/