Calculator
What the Tablespoon Converter does
Tablespoon Converter: 1 tbsp = 14.78676478 mL, so multiply a tablespoon (US) value by 14.78676478 to get millilitre, or divide to go back. Example: 1 tbsp = 14.78676478 mL.
From Value, From and To, this tool derives Result, How it was calculated and Reverse conversion. You can nudge a single number and watch the effect straight away.
Most people who open the Tablespoon Converter are people following a recipe or spec written elsewhere. Two industries often use the same word for slightly different quantities.
There is no account, no upload and no server round trip, because the page does the work itself.
The method, a field-by-field reference and a worked example built from the defaults are all on this page.
What do the Tablespoon Converter fields mean?
The Tablespoon Converter uses 3 inputs. Pre-filled inputs double as documentation: each one shows what a reasonable value looks like.
| Field | What to enter | Default |
|---|---|---|
| Value | required | 1 |
| From | choose from Millilitre (mL), Centilitre (cL), Litre (L), Cubic metre (m³), Cubic centimetre (cm³) or Cubic inch (in³) | Tablespoon (US) (tbsp) |
| To | choose from Millilitre (mL), Centilitre (cL), Litre (L), Cubic metre (m³), Cubic centimetre (cm³) or Cubic inch (in³) | Millilitre (mL) |
How does the Tablespoon Converter work?
Both units are converted through volume's base unit (L), so any of the 19 units in the dropdowns can be paired in either direction without loss of accuracy.
Factors follow the internationally agreed definitions. The inch has been exactly 25.4 mm since 1959, and an exact definition is used wherever one exists. Where a unit is fixed by measurement rather than by agreement, the accepted CODATA or IAU value is used.
Worked example
These are the values the Tablespoon Converter loads by default, and the result it produces from them. This is the worked example the page starts from, reproduced here so you can check the arithmetic.
| Value | 1 |
|---|---|
| From | Tablespoon (US) (tbsp) |
| To | Millilitre (mL) |
| Result | 14.78676478 mL |
|---|---|
| How it was calculated | 1 tbsp = 14.78676478 mL, so 1 × 14.78676478 = 14.78676478 mL |
| Reverse conversion | 0.067628045 tbsp (if you meant 1 mL) |
The tablespoon
The US tablespoon is exactly 14.78676478125 millilitres (half a US fluid ounce, or 3 US teaspoons), but this is another unit where the "same" name means a different volume in different countries.
Worth knowing
- Australia uses a 20 mL tablespoon (equal to 4 teaspoons rather than 3), about 35% bigger than the US tablespoon, which is a well-known trap for anyone following a US recipe in an Australian kitchen, or vice versa.
- Most of the rest of the English-speaking world (UK, Canada, New Zealand) uses a 15 mL tablespoon, close to but not identical to the US 14.79 mL value. Close enough that the difference rarely matters in home cooking.
- For measuring small quantities of a strong ingredient (baking soda, spices, medication), the country-specific tablespoon size can matter enough to affect the result: when precision counts, checking which standard a recipe assumes is worth the extra step.
Definitions: BIPM SI Brochure · NIST reference on units
How to use it
- Fill in Value.
- Pick a value for From: the options are Millilitre (mL), Centilitre (cL), Litre (L), Cubic metre (m³), Cubic centimetre (cm³) or Cubic inch (in³).
- Pick a value for To: the options are Millilitre (mL), Centilitre (cL), Litre (L), Cubic metre (m³), Cubic centimetre (cm³) or Cubic inch (in³).
- Type a value and the answer is already there by the time you stop.
- The panel reports Result, How it was calculated and Reverse conversion.
- Copy Link puts the current inputs in the URL, so bookmarking it brings the same numbers back.
What this tool does not do
- Repeated conversions compound rounding, so convert once from the original value where you can.
- Conversion factors use SI definitions; some industries use their own rounded factors.
- It assumes the values you give are already consistent with each other.
- Confirm the units before you act on the output. The arithmetic is only as sound as what went in.
Frequently asked questions
The form asks for Value, From and To. Every box already holds a working value, which makes it easy to isolate the effect of a single variable.
With the values loaded when the page opens, result comes out as 14.78676478 mL. The figure is derived from the inputs above, so it updates whenever they do.
No. The work runs in JavaScript inside this page, so your values never leave your device. You can confirm it in your browser network tab.
No. There is no account, no usage cap and no trial period. The site is funded by advertising rather than by charging for the tools.
Full double precision is used throughout; only the displayed figure is shortened.