Tablespoon to Milliliter Converter

About the Tablespoon to Milliliter Converter

The tablespoon is one of the most frequently used cooking measurements, but its exact volume varies by country — 14.79 mL in the US, 15 mL in the UK and most of the world, and 20 mL in Australia. When following recipes from different countries or converting between metric and US customary measurements, these differences can cause measurable changes in seasoning, baking chemistry, and medication dosing.

This converter handles all three tablespoon standards (US, UK/metric, and Australian) alongside ten volume units including teaspoons, fluid ounces, cups, centiliters, and liters. It provides a quick-reference table for common tablespoon-to-mL conversions, a visual volume bar for intuitive scale, and a regional comparison table that explains why "1 tablespoon" means different things in different countries.

Whether you're scaling a recipe, measuring supplements, or converting between a US cookbook and metric kitchen equipment, this converter gives you precise conversions with the regional nuance that generic converters miss.

When This Page Helps

The tablespoon varies by country, so the same recipe can shift by a full milliliter or more depending on whether it assumes US, UK, or Australian measures. This converter preserves those distinctions and keeps kitchen conversions accurate for baking, cooking, and supplement prep.

How to Use the Inputs

1. Select your input unit (US tbsp, UK/metric tbsp, Australian tbsp, or any volume unit).
2. Enter the volume, or click a preset for common tablespoon quantities.
3. Select your target output unit.
4. Read the primary conversion and all equivalent volumes.
5. Check the visual bar for an intuitive sense of the volume relative to a cup.
6. Consult the quick reference table for common tablespoon equivalences.
7. Review the regional differences table for international recipe conversion.

Example Calculation

Tips & Best Practices

• For baking, always use measuring spoons, not silverware — precision matters for leavening agents and salt.
• When an Australian recipe says "1 tablespoon," use 20 mL (4 tsp), not 15 mL.
• A standard US tablespoon of butter weighs about 14 grams (½ oz).
• For liquids, 1 US tablespoon ≈ 15 mL is close enough for cooking. For baking, use 14.79 mL.
• "Heaped" or "rounded" tablespoon has no standard definition — it adds roughly 50% more volume than a level tablespoon.

Tablespoon vs Teaspoon Hierarchy

| Measure | US (mL) | Metric (mL) | Australian (mL) | |---|---|---|---| | ⅛ teaspoon | 0.62 | 0.63 | 0.63 | | ¼ teaspoon | 1.23 | 1.25 | 1.25 | | 1 teaspoon | 4.93 | 5 | 5 | | 1 tablespoon | 14.79 | 15 | 20 | | ¼ cup | 59.15 | 62.5 | 62.5 | | 1 cup | 236.59 | 250 | 250 |

When Precision Matters

For most savory cooking, ±1 mL per tablespoon makes no difference. But for baking, where chemical leavening (baking soda, baking powder) is measured in teaspoons and tablespoons, a 35% error (using a 20 mL Australian spoon when a recipe assumes 14.79 mL US) can ruin texture and rise. Always check the recipe's country of origin.

Medication Dosing

Many liquid medications are dosed in teaspoons (5 mL) or tablespoons (15 mL). Using household silverware instead of measuring spoons leads to dosing errors of ±30%. The FDA recommends using a calibrated measuring device, not a kitchen spoon, for medication.

Frequently Asked Questions

• How many mL in a tablespoon?

  US tablespoon = 14.79 mL, UK/metric = 15 mL, Australian = 20 mL. Most international recipes use 15 mL.

• How many teaspoons in a tablespoon?

  3 teaspoons = 1 tablespoon in both US and metric systems. However, in Australia, 1 tablespoon = 4 teaspoons (because Australian tsp = 5 mL but tbsp = 20 mL).

• Can I use a regular spoon as a tablespoon?

  No — household spoons vary widely (10–20 mL). For accurate cooking and especially baking or medication, use measuring spoons.

• How many tablespoons in a cup?

  16 US tablespoons = 1 US cup (236.6 mL). A metric cup is 250 mL ≈ 16.67 metric tablespoons.

• Why is the Australian tablespoon different?

  Australia adopted 20 mL as their standard tablespoon in the 1970s metrication, likely because 20 mL is a rounder number. Australian recipes account for this — do not substitute a 15 mL spoon.

• Is a dessert spoon the same as a tablespoon?

  No. A dessert spoon is approximately 10 mL — two-thirds of a metric tablespoon. It is used in UK and Australian recipes.