How do I convert between the various measurements?

Question

Let's have a single question giving the conversion between cups, ounces, teaspoons, and gallons, just to have one convenient reference.

Answer

US Measurements:

• 1 tbsp = 3 tsp
• 1 oz = 2 tbsp
• 1 cup = 8 oz
• 1 quart = 4 cups
• 1 gallon = 4 quarts

Metric conversion:

• 1 oz ~ 30 mL (29.57 exact)
• 1 cup ~ 240 mL (236.59 exact)
• 1 L ~ 1 qt (1.06 exact)
• 1 oz = 28.4 g
• 1 kg = 2.2 lbs

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