How Many Tablespoons Are in a Cup?
The Formula
Common Cups to Tablespoons Values
| Cups | Tablespoons | Fraction |
|---|---|---|
| 0.25 | 4.00 | 4 |
| 0.5 | 8.00 | 8 |
| 0.75 | 12.00 | 12 |
| 1 | 16.00 | 16 |
| 1.5 | 24.00 | 24 |
| 2 | 32.00 | 32 |
| 3 | 48.00 | 48 |
| 4 | 64.00 | 64 |
| 5 | 80.00 | 80 |
| 8 | 128.00 | 128 |
| 10 | 160.00 | 160 |
| 12 | 192.00 | 192 |
A Worked Example
A recipe halved from a full batch calls for half of ⅔ cup of oil, an awkward fraction to eyeball. Multiply ⅔ (0.67) by 16 to get about 10.7 tablespoons, then halve that to roughly 5⅓ tablespoons for the reduced recipe — far easier to measure precisely with a tablespoon than guessing at a third of a cup.
When This Conversion Matters
This is one of the most searched kitchen conversions because tablespoons are often more convenient for small quantities.
The ratio never changes: 16 tablespoons always make up 1 cup, regardless of ingredient.
Recipe developers writing for a general audience frequently note both the cup and tablespoon amount for smaller quantities, since not every kitchen has a full set of graduated cup measures on hand.
This conversion is also the starting point for figuring out sticks of butter in a recipe, since a standard US butter stick is exactly 8 tablespoons, or half a cup.
Recipe scaling calculators built into cooking apps and websites rely on this fixed 16:1 ratio internally whenever a user adjusts a recipe's serving size and the app needs to recalculate ingredient amounts in real time.
Standards and Sources
The 16-tablespoons-per-cup ratio is fixed under NIST measurement standards, since both the US cup (236.588ml) and US tablespoon (14.787ml) are defined against the same base unit.
This exact ratio does not hold in metric-cup countries: a 250ml metric cup divided by a 20ml Australian tablespoon works out to 12.5 tablespoons, a notably different figure from the US 16.
USDA and most US cookbook publishers rely on the 16-to-1 ratio consistently, making it one of the more dependable fixed conversions in American recipe writing.
The USDA's recipe standardization guidelines for school nutrition programs rely on the fixed 16-tablespoon-per-cup ratio when scaling recipes for large institutional batches, since it removes ambiguity across different serving sizes.
Where This Unit Comes From
The 16-tablespoon-per-cup relationship became fixed once the US formally standardized both units under the same customary system in the 20th century, cementing a ratio that had previously varied more loosely based on the size of household spoons.
Where This Shows Up
Recipe developers writing for a general audience frequently note both the cup and tablespoon amount for smaller quantities, since not every kitchen has a full set of graduated cup measures on hand.
This conversion is also the starting point for figuring out sticks of butter in a recipe, since a standard US butter stick is exactly 8 tablespoons, or half a cup.
Homemade salad dressing and marinade recipes frequently list a base ratio in cups for a large batch, with tablespoon conversions used to portion out smaller test batches before committing to a full recipe.
Common Mistakes
- Assuming the 16-tablespoon ratio applies to every country's cup and tablespoon sizes, when Australia's larger tablespoon changes the ratio to 12.5.
- Confusing a heaping tablespoon with a level one when converting, introducing inconsistent extra volume.
- Forgetting that this is a volume-to-volume conversion, so it applies the same way regardless of the ingredient being measured.
- Forgetting that this fixed ratio only applies to volume, not weight — 16 tablespoons of flour and 16 tablespoons of honey weigh very different amounts.
US System vs Australian System: Tablespoons per Cup
| US System | Australian System | |
|---|---|---|
| Cup size | 236.588 ml | 250 ml |
| Tablespoon size | 14.79 ml | 20 ml |
| Tablespoons per cup | 16 | 12.5 |
Related Converters
Frequently Asked Questions
How many tablespoons are in a cup?+
16 tablespoons make 1 cup.
How many tablespoons are in a third of a cup?+
About 5.3 tablespoons.
How many teaspoons are in a tablespoon?+
3 teaspoons make 1 tablespoon.
How many tablespoons are in a stick of butter?+
8 tablespoons, since a standard US butter stick is half a cup, pre-marked into 8 equal segments.
How many tablespoons are in ¾ cup?+
12 tablespoons, since ¾ of 16 is 12.
Does the 16-tablespoon rule apply to all cup sizes worldwide?+
No — it applies specifically to the US cup and US tablespoon. Metric-cup countries produce a different ratio.
Does this ratio change for a UK or Canadian cup?+
Canada generally follows the US ratio in practice, while UK recipes more often list tablespoons directly rather than relying on cup conversions at all.