Tablespoons to milliliters

Medicine dosing spoons, cocktail recipes, and precise baking all lean on this conversion, since a US tablespoon (about 14.8 milliliters) is a noticeably different volume from a metric tablespoon (15 milliliters) or an Australian tablespoon (20 milliliters), a gap worth checking whenever a dose or a recipe genuinely needs precision, since a children's medicine dosed by the tablespoon is exactly the kind of measurement where a rounding error is worth avoiding entirely.

DIY cleaning and skincare recipes shared online are a second common trigger: ingredient amounts, such as essential oils, vinegar, or witch hazel, are frequently listed in milliliters for precision, while most home cooks reach for a kitchen tablespoon rather than a graduated cylinder to measure them out, making an accurate conversion useful before mixing anything that touches skin, since a product meant to be lightly diluted can irritate skin if a tablespoon is assumed to hold more or less than it actually does.

The US tablespoon and the milliliter are both volume units on the same linear scale, so converting between them is a single fixed multiplier with no offset.

Multiply the tablespoon value by 14.78676478 to get milliliters:

mL = tbsp × 14.78676478

At common volumes: 1 tbsp comes to 14.79 mL, 2 tbsp come to 29.57 mL, and half a tablespoon comes to 7.39 mL, enough range to cover most dosing and recipe needs.

For general cooking, rounding to the nearest milliliter (15 mL per tablespoon) is close enough; medicine dosing or small-batch formulation should keep at least one decimal place, since the US figure is genuinely about 1.4% smaller than a flat 15 mL and that gap can matter at higher doses.

The most common mistake is applying this US figure to an Australian recipe, where a tablespoon is defined as 20 mL, a 35% difference that matters a great deal in a recipe with several tablespoon measurements, especially in baking where ratios are sensitive to that much extra liquid.