Because who wants to do math when we could be baking?!

Measurement Equivalents

(Volume) 1 ounce = 28.3495 grams

1 pinch = 1/8 teaspoon
1 teaspoon = 1/3 tablespoon = 1/6 ounce
2 teaspoons = 2/3 tablespoon = 1/3 ounce
3 teaspoons = 1 tablespoon = ½ ounce
2 tablespoons = 1/8 cup = 1 ounce
4 tablespoons = ¼ cup = 2 ounces
5 tablespoons + 1 teaspoon = 1/3 cup = 2 2/3 ounces
8 tablespoons = ½ cup = 4 ounces
12 tablespoons = ¾ cup = 6 ounces
16 tablespoons = 1 cup = 8 ounces
2 cups = 1 pint = ½ quart = 16 ounces
4 cups = 2 pints = 1 quart = 32 ounces
16 cups = 8 pints = 4 quarts = 1 gallon

Common Ingredient Equivalents

1 cup butter = 8 ounces = 16 tablespoons = 2 sticks
1 cup shredded cheese = 4 ounces
1 cup chocolate chips = 6 ounces
1 cup all-purpose flour = 4¼ ounces
1 cup bread flour = 4¼ ounces
1 cup cake flour = 4 ounces
1 cup whole wheat flour = 4 ounces
1 cup granulated sugar = 7 ounces
1 cup brown sugar = 7½ ounces
1 lemon = 2 tablespoons juice = 1½ teaspoons zest
1 packet dry yeast = 2¼ teaspoons = 3/5 ounce = 1 cake

Additional Resource: I use the King Arthur Flour Master Weight Chart regularly; it is a list of over 100 common ingredients with accompanying volume and weight (in ounces) measurements.

Pan Size Conversions

(Dimension) 1 inch = 2.54cm  (Volume) 1 cup = 237 mL

Round Pans:
6 x 2 inches = 15 x 5 cm = 4 cups = 948ml
8 x 2 inches = 20 x 5 cm = 6 cups = 1.4 liters
9 x 2 inches = 23 x 5 cm = 8 cups = 1.9 liters

Springform Pans:
9 x 2½ inches = 23 x 6 cm = 10 cups = 2.4 liters
9 x 3 inches  = 23 x 8 cm = 12 cups = 2.8 liters
10 x 2½ inches = 25 x 6 cm = 12 cups = 2.8 liters

Bundt Pans:
7½ x 3 inches = 19 x 8 cm = 6 cups = 1.4 liters
9 x 3 inches = 23 x 8 cm = 9 cups = 2.1 liters
10 x 3½ inches = 25 x 9 cm = 12 cups = 2.8 liters

Tube Pans:
8 x 3 inches = 20 x 8 cm = 9 cups = 2.1 liters
9 x 3 inches = 23 x 8 cm =  12 cups = 2.8 liters
10 x 4 inches = 25 x 10 cm = 16 cups = 3.8 liters

Square Pans:
8 x 8 x 2 inches = 20 x 20 x 5 cm = 8 cups = 1.9 liters
9 x 9 x 2 inches = 23 x 23 x 5 cm = 10 cups = 2.4 liters
10 x 10 x 2 inches = 25 x 25 x 5 cm = 12 cups = 2.8 liters

Rectangular Pans:
11 x 7 x 2 inches = 28 x 18 x 5 cm = 6 cups = 1.4 liters
13 x 9 x 2 inches = 33 x 23 x 5 cm = 14 cups = 3.3 liters

Jelly Roll Pans:
10½ x 15½ x 1 = 27 x 39 x 2.5 cm = 10 cups = 2.4 liters
12½ x 17½ x 1 = 32 x 44 x 2.5 cm = 12 cups = 2.8 liters

Loaf Pans:
8 x 4 x 2½ inches = 20 x 10 x 6 cm = 4 cups = 948 ml
8½ x 4½ x 2½ inches = 21 x 11 x 6 cm = 6 cups = 1.4 liters
9 x 5 x 3 inches = 23 x 13 x 8 cm = 8 cups = 1.9 liters

Additional Resource: You can find even more obscure pan sizes with measurements at Joyofbaking.com.

Temperature Conversions

275°F = 140°C
300°F = 150°C
325°F = 165°C
350°F = 180°C
375°F = 190°C
400°F = 200°C
425°F = 220°C
450°F = 230°C
475°F = 240°C