Conversion
Tablespoons to Milliliters
Convert US tablespoons to milliliters instantly — type a value and watch it convert live, with the formula, the working shown step by step, and lookup charts for baking and dosing.
Convert tablespoons to milliliters
tbsp ↔ mL× 14.7867647813
3 tbsp equals
44.36mL
tbsp
3
mL
44.36
per tbsp
14.7867647813
Edit either field — the other updates live.
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The basics
What does the conversion mean?
Tablespoons and milliliters both measure volume — one comes from the old imperial kitchen, the other from the metric system. Because they started on different foundations, the ratio between them is not a round number. Converting is a single multiplication; the only thing to keep straight is which tablespoon you mean.
1 tbsp = 14.79 mL
A tablespoon is half a fluid ounce
The US tablespoon is defined as exactly half a US fluid ounce. Two tablespoons fill one fluid ounce; sixteen fill one cup. The milliliter equivalent comes straight from the fluid ounce definition.
3 tbsp ≈ 44.36 mL
× 14.78676478125
One factor, exact to many places
There is no offset to subtract — volume scales cleanly. Multiply the tablespoons by the factor and you have milliliters. For cooking, rounding to fifteen is accurate enough; for medicine or chemistry, use the full figure.
Round to × 15 for a quick estimate
Method
How to convert tablespoons to mL by hand
Two real steps and a sanity check. It is a single multiplication at heart.
- 1
Write down the factor
One US tablespoon equals 14.78676478125 mL exactly. For everyday cooking, 15 mL per tablespoon is the accepted shortcut — it is within 1.4% of the true figure.
1 tbsp = 14.78676478125 mL - 2
Multiply the tablespoons
Multiply the number of tablespoons by the factor. The product is the same volume expressed in milliliters. Use the full factor when dosing medicine or following a pharmaceutical formula.
3 × 14.78676478125 = 44.36 mL - 3
Check the size makes sense
The milliliter figure should be about fifteen times the tablespoon count. If your answer is much larger or smaller, check that you did not accidentally multiply by the inverse.
3 tbsp → ~44 mL ✓
Quick chart
Tablespoons to milliliters lookup table
Looking up a specific amount? Switch between common tablespoon amounts, small baking quantities, and the reverse milliliters-to-tablespoons direction.
tbsp
mL
1 tbsp
14.79 mL
2 tbsp
29.57 mL
3 tbsp
44.36 mL
4 tbsp
59.15 mL
5 tbsp
73.93 mL
6 tbsp
88.72 mL
8 tbsp
118.29 mL
10 tbsp
147.87 mL
12 tbsp
177.44 mL
16 tbsp
236.59 mL
Where it shows up
When you actually need this
Three everyday places where converting tablespoons to milliliters matters — and where using the wrong number causes real problems.
±1.4% rounding
Precise baking
Pastry and bread dough are sensitive to small measurement errors. When a recipe is in tablespoons but your scale reads milliliters, the exact factor keeps the hydration ratio on target — rounding to fifteen is fine for most batters but can matter for croissants.
dose accuracy
Medicine and supplement dosing
Liquid medicines and syrups are often prescribed in milliliters, but bottles ship with tablespoon-marked spoons. Using the precise figure — not fifteen — matters here. For a child's dose, a one-milliliter error is not trivial.
2× or 0.5×
Scaling recipes to metric
Doubling or halving a US recipe for a metric kitchen means converting every tablespoon measurement. The lookup table above handles this at a glance without repeating the multiplication each time.
Reference
Common tablespoon amounts in milliliters
Amounts worth knowing by heart. Each is the US tablespoon converted with the same factor the tool uses above.
Amount
tbsp
mL
1 tablespoon
1
14.79
2 tablespoons (= 1 fl oz)
2
29.57
3 tablespoons
3
44.36
4 tablespoons (= ¼ cup)
4
59.15
8 tablespoons (= ½ cup)
8
118.29
16 tablespoons (= 1 cup)
16
236.59
Worth knowing
Facts and shortcuts worth remembering
A handful of relationships that make tablespoon conversions almost automatic.
≈ 15 mL
Round to fifteen for convenience
Most metric measuring spoons label the tablespoon as fifteen milliliters. That rounding is accurate enough for every recipe and much easier to pour than 14.787.
1 tbsp → 15 mL (within 1.4%)
1 tbsp = 3 tsp
Teaspoon relationship
One tablespoon is exactly three teaspoons. A teaspoon is roughly five milliliters, so three of them give about fifteen — the same rounded figure.
1 tsp ≈ 4.93 mL
2 tbsp = 1 fl oz
Fluid ounce pairing
Two tablespoons make exactly one fluid ounce. This is where the 14.787 mL figure comes from: half of the fluid ounce's 29.5735 mL definition.
2 tbsp ≈ 29.57 mL
16 tbsp = 1 cup
Cup equivalence
Sixteen tablespoons fill one standard US cup. In milliliters that is about 237 mL — the number on the side of a US liquid measuring cup, rounded from 236.59.
16 tbsp ≈ 236.59 mL
÷ 15
Reverse: mL to tbsp
To go the other way, divide the milliliter figure by fifteen for a fast kitchen estimate, or by 14.787 for the exact figure. The lookup table above handles common mL amounts automatically.
45 mL ÷ 15 = 3 tbsp
spoon markings
Read your measuring spoon
If your measuring spoon is marked in milliliters, check which definition it uses. Most US sets say 15 mL for the tablespoon. Australian sets say 20 mL. The markings tell you which standard applies.
Most US spoons: 15 mL
Variants
Tablespoon sizes around the world
Not all tablespoons are the same. The gap between a US and an Australian tablespoon is large enough to throw off a recipe — here is where each stands.
14.79 mL
US tablespoon (this tool)
The US tablespoon is defined as half a US fluid ounce: exactly 14.78676478125 mL. It is the standard for American recipe books, US nutrition labels, and most English-language recipes published outside Australia and the UK. This converter uses the US definition.
½ fl oz · 3 tsp · 1/16 cup
20 mL exactly
Australian metric tablespoon
Australia redefined the tablespoon metrically as exactly twenty milliliters — four metric teaspoons of five milliliters each. That makes it about 35% larger than the US tablespoon. Australian cookbooks rely on this definition, so an Australian tablespoon of baking powder is significantly more than an American one.
= 4 metric teaspoons
≈ 17.76 mL historically
UK tablespoon (old imperial)
The old UK imperial tablespoon was five-eighths of a UK fluid ounce, landing at about 17.76 mL. Modern British recipes typically use the metric convention of fifteen milliliters, so the distinction matters mainly for older cookbooks.
5/8 of a UK fl oz
≈ 15 mL in practice
International metric convention
Many countries without a formal tablespoon definition have converged on fifteen milliliters as the de facto tablespoon — matching the rounded US figure. When a recipe does not specify, fifteen is the safest assumption outside Australia.
Used in most modern UK recipes
Common mistakes
Where conversions go wrong
Three slips that produce a wrong result — easy to avoid once named.
14.79 ≠ 20
US vs Australian tablespoon
An Australian recipe calls for one tablespoon of baking powder. If you use the US conversion and measure 14.79 mL, you are adding 26% less than the recipe intends. Check which country the recipe comes from before converting.
15 vs 14.787
Rounding when precision matters
For cooking, rounding to fifteen is fine. For liquid medications, supplements, or chemical solutions, use the full factor. A 1.4% rounding error on a ten-milliliter child's dose is 0.14 mL — small but not negligible for some medicines.
tbsp ≠ tsp
Tablespoon vs teaspoon mix-up
One tablespoon is three teaspoons. Confusing the two — easy to do when both appear in the same recipe — gives an answer that is either triple or one-third of what was intended. The abbreviations help: tbsp for tablespoon, tsp for teaspoon.
FAQ
Common questions
One US tablespoon is exactly 14.78676478125 mL — it is defined as half a US fluid ounce, and one fluid ounce is 29.5735295625 mL. Most measuring spoons round this to 15 mL, which is accurate enough for cooking but not for pharmaceutical dosing.
Multiply the number of tablespoons by 14.78676478125. For example, 3 tbsp × 14.78676478125 ≈ 44.36 mL. For a quick mental estimate, multiply by 15 — you will be within 1.4% of the exact answer.
Two US tablespoons equals 2 × 14.78676478125 ≈ 29.57 mL — exactly one US fluid ounce. This pairing is worth memorizing: whenever a recipe calls for 2 tbsp, you can substitute 30 mL (the rounded equivalent) or one fl oz.
No. The US tablespoon is about 14.79 mL, while the Australian metric tablespoon is defined as exactly 20 mL (4 metric teaspoons). That is 35% larger. If you are following an Australian recipe and measuring in milliliters, use 20 mL per tablespoon — not 15. This converter uses the US tablespoon.
The UK traditionally defined a tablespoon as 5/8 of a fluid ounce, which works out to about 17.76 mL under the old imperial system. In modern British cooking the tablespoon is usually taken as 15 mL (the same as the metric rounding of the US tbsp), so many UK recipes are interchangeable with US ones in practice. If a recipe explicitly states a UK tablespoon and you need precision, use 17.76 mL.
There are exactly 16 US tablespoons in 1 US cup. A cup is 8 fluid ounces, each ounce is 2 tablespoons, so 8 × 2 = 16. In milliliters, 16 tbsp × 14.787 ≈ 236.59 mL, which is why a US cup is conventionally stated as 240 mL.
One US tablespoon equals exactly 3 US teaspoons. A teaspoon is 4.92892159375 mL, and 3 × 4.929 ≈ 14.787 mL — confirming the tablespoon figure. When a recipe calls for 1 tbsp and you only have a teaspoon measure, fill it three times.
The US tablespoon is defined in terms of the US fluid ounce (1 tbsp = ½ fl oz), and the US fluid ounce was fixed by international agreement at 29.5735295625 mL exactly. Half of that is 14.78676478125 mL — not a tidy number because the fluid ounce was originally defined in terms of water weight, not in terms of the metric system.
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Ugo CharlesBuilt and fact-checked against our editorial standards · Last updated June 2026
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