Milliliters to Tablespoons Converter
Convert milliliters to US tablespoons — for a metric quantity measured with US spoons.
Updated
US tablespoons
1.01tbsp
15 mL = 1.01 tbsp
In short
How many tablespoons is 15 mL?
15 millilitres is 1.01 US tablespoons, so it is one tablespoon for any practical purpose. The US tablespoon is 14.79 millilitres and the metric one is a round 15, a difference of 1.44 percent or about four drops. An Australian tablespoon is a different unit again at 20 millilitres, which is 1.35 US tablespoons.
Two US tablespoons make exactly one fluid ounce, so 30 mL is almost exactly 2 tablespoons.
milliliters to US tablespoons — quick reference
| milliliters (mL) | US tablespoons (tbsp) |
|---|---|
| 5 mL | 0.34 tbsp |
| 10 mL | 0.68 tbsp |
| 15 mL | 1.01 tbsp |
| 20 mL | 1.35 tbsp |
| 30 mL | 2.03 tbsp |
| 45 mL | 3.04 tbsp |
| 60 mL | 4.06 tbsp |
| 100 mL | 6.76 tbsp |
The formula, worked line by line
The conversion divides by a constant that was defined rather than measured. A US tablespoon is half a US fluid ounce, the fluid ounce is one hundred and twenty-eighth of the US liquid gallon, and the gallon is exactly 231 cubic inches. Once the inch was fixed at 2.54 centimetres, everything downstream became exact.
“The US gallon is exactly 231 cubic inches, and the inch is exactly 2.54 centimetres.”
The arithmetic therefore contributes no error whatsoever. Every millilitre of variation that reaches the bowl comes from how the spoon was filled and how much stayed on it, which is why this page keeps returning to which instrument to reach for.
tbsp = mL / 14.78676478125
14.78676478125 = 29.5735295625 / 2 (half a fluid ounce)
15 mL -> 15 / 14.78676478125 = 1.01 tbsp
30 mL -> 30 / 14.78676478125 = 2.03 tbsp
1 tbsp = 3 tsp - 2 tbsp = 1 fl oz - 16 tbsp = 1 cup- Millilitres entered
- 15
- Exact divisor
- 14.78676478125 mL per tablespoon
- Division
- 15 / 14.78676478125 = 1.0144
- US tablespoons
- 1.01 tbsp
The 0.01 is the whole gap between the metric and US customary tablespoon. It comes to roughly four drops, which is less than the residue left in the spoon after pouring, and is the reason a European recipe and an American one can share a spoon without comment.
Why the answers cluster near whole numbers
Round metric quantities keep landing close to whole US spoons because the two systems are only 1.44 percent apart. Fifteen gives 1.01, thirty gives 2.03, forty-five gives 3.04. The drift is about a hundredth of a spoon per spoonful, so it takes seventy spoonfuls before it reaches a full extra one.
- At 15 mL, one spoonful
- 0.01 tbsp over
- At 60 mL, four spoonfuls
- 0.06 tbsp over
- At 240 mL, sixteen spoonfuls
- 0.23 tbsp over
- At 1,000 mL
- 0.96 tbsp over, nearly one whole spoon
A litre measured out in metric tablespoons overshoots a litre measured in US ones by not quite one spoonful. Nobody measures a litre in spoons.
Where a fluid ounce fits
Two US tablespoons make exactly one fluid ounce of 29.57 millilitres, so a 30 millilitre measure is two tablespoons within half a percent. This is the ratio that makes drink recipes portable: a 1.5 fluid ounce jigger is three tablespoons, and a shot measured in spoons comes out the same as one measured in ounces.
How to use the milliliters to tablespoons converter
One US tablespoon is 14.78676478125 millilitres, so dividing by it turns a metric quantity into American spoons. The figure is half a fluid ounce exactly, which is where the long decimal comes from: the fluid ounce is a US gallon of 231 cubic inches split into 128 parts, and none of that was chosen to suit the millilitre.
In use, the number to remember is that 15 millilitres is one tablespoon. The metric spoon is a round 15 and the US one is 14.79, so they differ by 1.44 percent. That is roughly four drops, less than what clings to the spoon on the way to the bowl, and no recipe has ever needed the distinction.
1.01 tbsp
Fifteen millilitres
the metric tablespoon
2.03 tbsp
Thirty millilitres
about one fluid ounce
1.35 tbsp
Twenty millilitres
the Australian tablespoon
That last figure is worth keeping in view. An Australian tablespoon holds 20 millilitres, so a recipe from Australia is asking for about a third more per spoon than an American one. Three Australian tablespoons come to 60 millilitres where three US ones come to 44, which is enough to change a dressing.
The middle band between about 20 and 60 millilitres is where this page earns its keep. Those quantities are too large for a teaspoon to be convenient and too small for a jug to read accurately, so they get measured in tablespoons and part-tablespoons, and the part is where the accuracy leaks away.
- 5 mL
- 0.34 tbsp, one teaspoon
- 15 mL
- 1.01 tbsp, one tablespoon
- 30 mL
- 2.03 tbsp, one fluid ounce
- 45 mL
- 3.04 tbsp
- 60 mL
- 4.06 tbsp, a quarter cup
- 250 mL
- 16.91 tbsp, a metric cup
Every round metric figure lands within about one percent of a whole number of US spoons, which is the whole reason the two systems interchange so casually.
When the quantity is smaller than a spoonful
Below about 10 millilitres a teaspoon reads far more reliably than a fraction of a tablespoon. That page uses the exact 4.92892159375 millilitre teaspoon and covers medicine dosing.
Open the mL to teaspoons converter →Millilitres converted to US tablespoons, with the practical spoon combination alongside. The third column uses only measures that exist as physical objects.
| Millilitres | US tablespoons | What to measure |
|---|---|---|
| 5 mL | 0.34 tbsp | 1 teaspoon |
| 10 mL | 0.68 tbsp | 2 teaspoons |
| 15 mL | 1.01 tbsp | 1 tablespoon |
| 20 mL | 1.35 tbsp | 1 tbsp + 1 tsp |
| 25 mL | 1.69 tbsp | 1 tbsp + 2 tsp |
| 30 mL | 2.03 tbsp | 2 tablespoons |
| 45 mL | 3.04 tbsp | 3 tablespoons |
| 50 mL | 3.38 tbsp | 3 tbsp + 1 tsp |
| 60 mL | 4.06 tbsp | a quarter cup |
| 75 mL | 5.07 tbsp | 5 tablespoons |
| 100 mL | 6.76 tbsp | a jug, not a spoon |
| 150 mL | 10.14 tbsp | a jug |
| 250 mL | 16.91 tbsp | a metric cup |
The awkward band between a spoon and a jug
Kitchen measuring has a gap in it. Below about 15 millilitres a teaspoon is precise and easy. Above about 60 a measuring cup or jug is precise and easy. Between the two, everything gets measured in tablespoons and part-tablespoons, and the part is guessed rather than measured.
The fix is to stop thinking in tablespoons and start thinking in teaspoons. A tablespoon is exactly three teaspoons, so any quantity in that band can be expressed as a whole number of teaspoons. Forty-five millilitres is nine teaspoons. Twenty-five is a little over five. Neither requires judging a fraction of anything.
- As tablespoons
- 1.69 tbsp, which nobody can pour
- As a tablespoon plus teaspoons
- 1 tbsp + 2 tsp, about 24.7 mL
- As teaspoons alone
- 5 tsp, about 24.6 mL
- In a jug marked every 25 mL
- one mark, if you can read it
- Best in a kitchen
- 1 tbsp + 2 tsp
The spoon combination lands within half a millilitre of the target using only measures that exist as physical objects. The 1.69 figure is arithmetically correct and practically useless, which is the difference between a converter that answers and one that helps.
This is also why recipes are written the way they are. An author choosing between 25 millilitres and a tablespoon plus two teaspoons is choosing between a number and an instruction, and the instruction produces a more consistent result across every kitchen that follows it.
Three tablespoons, not one unit
The tablespoon is the least standardised measure in common use. The US customary spoon is 14.79 millilitres. The metric spoon used across the UK, Europe, Canada and New Zealand is 15. Standards Australia specifies 20. Only the last of those is different enough to matter, but it is different enough to matter a lot.
The FDA adds a fourth figure for a different purpose. For nutrition labelling it defines a tablespoon as 15 millilitres, alongside a 5 millilitre teaspoon and a 30 millilitre fluid ounce. Those are regulatory roundings for packaging rather than conversions of the customary units, which is why a label and a recipe can differ slightly.
- In US tablespoons
- 1.35 tbsp
- In metric 15 mL tablespoons
- 1.33 tbsp
- In Australian tablespoons
- exactly 1 tbsp
- In US teaspoons
- 4.06 tsp
A quantity that is a clean single spoonful in one country is an unmeasurable fraction in another. That is the practical cost of the split.
The tell for which system a recipe uses is the teaspoon ratio. If a recipe ever equates a tablespoon with three teaspoons it is American or British. If it equates one with four teaspoons it is Australian, and every tablespoon in it should be read as 20 millilitres rather than 15.
Every milliliters value, worked out
27 common milliliters figures each get their own page, with the answer at full precision, the arithmetic, what rounding costs, and the nearest real-world reference point on the scale.
Questions people ask
Sources
Where the constants and formulas on this page come from. Each line names the figure it backs.
The US tablespoon is half the US fluid ounce of exactly 29.5735295625 millilitres, giving 14.78676478125 mL.
NIST Guide to the SI, Appendix B.8 — Factors for units listed alphabetically — NIST
The Australian tablespoon is specified as 20 mL, unlike the 15 mL spoon used elsewhere.
AS 1325 — Kitchen utensils for measuring food ingredients — Standards Australia
For nutrition labelling the FDA defines a tablespoon as 15 mL, a teaspoon as 5 mL and a fluid ounce as 30 mL.
21 CFR 101.9(b)(5)(viii) — Nutrition labeling of food — US Food and Drug Administration, via the eCFR
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