How Many Ml in a Tablespoon? | The Simple Answer

A US tablespoon holds about 14.8 mL, but for cooking and nutrition labels it’s standardized to exactly 15 mL.

If a recipe calls for a tablespoon of vanilla extract and all you have is a metric measuring cup, knowing the mL equivalent saves the dish. The short answer for most US home cooks is 15 mL—that’s the value printed on every nutrition label and used in standard recipe scaling. But the full story involves a few regional differences that matter when precision counts.

What’s the Difference Between a US Tablespoon and Other Tablespoons?

Not all tablespoons are created equal. , while an Australian tablespoon is a full 20 mL. The metric tablespoon used internationally and in US nutrition labeling is exactly 15 mL. These differences add up fast: converting an Australian recipe’s four tablespoons of butter to US tablespoons leaves you nearly a full tablespoon short.

How to Convert Tablespoons to mL (and Back)

For everyday cooking, multiply the number of US tablespoons by 15 to get milliliters. So two tablespoons equal 30 mL, four tablespoons equal 60 mL, and so on. To go the other direction—converting mL to tablespoons—divide the milliliter number by 15. A 45 mL splash of olive oil equals 3 tablespoons. The difference between the two methods is less than a teaspoon per cup, so for most stovetop cooking the 15 mL shortcut is fine.

The Exploratorium’s measurement guide confirms that using the 15 mL rule keeps recipes consistent across common kitchen tasks.

When Does the Exact Measurement Actually Matter?

First, baking a delicate sponge or macaron recipe where ingredient ratios are critical—a 0.2 mL error per tablespoon adds up across several ingredients. Second, medical and supplement dosing: never use a kitchen tablespoon for liquid medicine; always use the dosing syringe or cup that came with the medication. Third, scaling a recipe up or down by large factors, like cutting a cake recipe to one-third, where small rounding errors become noticeable. For everyday soups, stir-fries, marinades, and salad dressings, the 15 mL shortcut works perfectly.

Common Mistakes People Make With Tablespoon Conversions

• Confusing tablespoons with teaspoons—three teaspoons equal one tablespoon, but the two are not interchangeable in a recipe.
• Assuming every country’s tablespoon is 15 mL—Australian recipes require a 20 mL tablespoon, and using a US measure throws the ratio off by 25 percent.
• Rounding too aggressively in precision tasks—dropping the 0.7868 mL when scaling a cake recipe for a crowd can shift the liquid balance noticeably.
• Grabbing a random spoon from the drawer—kitchen spoons vary wildly. A true tablespoon measuring spoon is designed to hold the standard volume, while serving spoons can hold two to three times that amount.