Convert Tablespoon to Fluid Ounce (tbsp → fl oz)

Converting tablespoons to fluid ounces is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.

1. 1
   Take your value in tablespoons

   Start with the number of tablespoons (tbsp) you want to convert.
2. 2
   Multiply by 0.500448

   The conversion factor from tbsp to fl oz is 0.500448. Multiply your value by this number.
3. 3
   Read the result in fluid ounces

   The result is your value in fluid ounces (fl oz).

Multiply the value in tablespoons by 0.500448. For the reverse direction, multiply by 1.998212.

• ✓US tbsp = 15 ml (practical); 14.787 ml (legal); 3 teaspoons in any system.
• ✓Australian tablespoon = 20 ml — 33% larger. Adjust when using Australian recipes.
• ✓For accurate cooking, weigh dry ingredients rather than measuring by tablespoon.

• ✗Using an Australian tablespoon (20 ml) for a US recipe (15 ml) — 33% overshoot.
• ✗Treating teaspoon and tablespoon as interchangeable — tablespoon is 3× larger.
• ✗Using a dinner spoon from the cutlery drawer as a tablespoon — they vary widely.

What is the Tablespoon?

The tablespoon equals exactly 15 milliliters (international culinary standard) or about 14.787 mL (US strict definition based on ½ fluid ounce). The tablespoon is a near-universal cooking measure for ingredients larger than a teaspoon but smaller than a cup — typical uses include oils, sauces, and condiments. The Australian tablespoon is uniquely 20 mL (4 teaspoons rather than 3), an oddity in international recipe interpretation. Standard recipes assume 1 tbsp = 15 mL globally except in Australia and the United States (where it is sometimes 14.787 mL but commonly rounded to 15 mL). The tablespoon relates to the teaspoon (3 tsp = 1 tbsp), the cup (16 tbsp = 1 cup), the fluid ounce (2 tbsp = 1 US fl oz), and the milliliter (1 tbsp = 15 mL conventional). Measuring spoons are calibrated to the local convention.

• Cooking recipes worldwide (dominantly US 15 ml)
• Nutrition-label serving sizes
• Over-the-counter liquid-medication doses

What is the Fluid Ounce?

The US fluid ounce equals exactly 29.5735295625 milliliters and is the standard small-volume unit for beverages, cocktails, personal-care products, and cooking in the United States. It is distinct from the (weight) ounce: 1 fluid ounce of water weighs about 1 ounce by weight at room temperature, but other liquids may weigh more or less. Soft-drink cans (12 fl oz), beer bottles (12 fl oz), shampoo bottles, and skin-cream tubs all label volume in fluid ounces. The US fluid ounce is slightly different from the UK imperial fluid ounce (28.4131 mL — about 4% smaller), reflecting the different gallon definitions. The US fl oz relates to the gallon (128 fl oz = 1 gal), the cup (8 fl oz = 1 cup), the tablespoon (2 tbsp = 1 fl oz), and the milliliter (1 fl oz ≈ 29.57 mL). Cocktail recipes universally use fluid ounces.

• US beverage and soda can sizes (12 fl oz)
• Cosmetic and personal-care product volumes
• US fluid recipes and cocktail measures