Cups to Tablespoons: The Short Answer
1 US cup = 16 tablespoons. Half a cup is 8 tablespoons, a third of a cup is 5⅓ tablespoons, and a quarter cup is 4 tablespoons. The conversion is exact and involves no density, no ingredient, and no rounding — a cup is legally defined as 16 tablespoons in the United States, which makes this the easiest conversion in the kitchen.
The rest of this page is about the places where that clean number stops being clean: awkward fractions, metric tablespoons, and the fact that “16 tablespoons of flour” and “1 cup of flour” are not quite the same thing.
The Formula, Both Directions
tablespoons = cups × 16 cups = tablespoons ÷ 16
That is the whole calculation. Every value in the chart below comes from it, and you can run it in your head for anything divisible by 4 or 8 — 16 ÷ 8 = 2 cups, 4 × 16 = 64 tablespoons for a big batch of stock.
Cups to Tablespoons Chart (Every Fraction You Will Meet)
| Cups | Tablespoons | Teaspoons | Millilitres (US) |
|---|---|---|---|
| ⅛ cup | 2 tbsp | 6 tsp | 30 mL |
| ¼ cup | 4 tbsp | 12 tsp | 59 mL |
| ⅓ cup | 5⅓ tbsp | 16 tsp | 79 mL |
| ½ cup | 8 tbsp | 24 tsp | 118 mL |
| ⅔ cup | 10⅔ tbsp | 32 tsp | 158 mL |
| ¾ cup | 12 tbsp | 36 tsp | 177 mL |
| 1 cup | 16 tbsp | 48 tsp | 237 mL |
| 1½ cups | 24 tbsp | 72 tsp | 355 mL |
| 2 cups | 32 tbsp | 96 tsp | 473 mL |
| 4 cups (1 quart) | 64 tbsp | 192 tsp | 946 mL |
The two problem rows are ⅓ cup and ⅔ cup, because 16 does not divide by 3. 5.333 tablespoons cannot be measured, so use 5 tablespoons plus 1 teaspoon (5 × 3 + 1 = 16 tsp). For ⅔ cup, measure 10 tablespoons plus 2 teaspoons (32 tsp). Remembering those two substitutions removes almost every scenario where this conversion actually frustrates a cook.
The Metric Tablespoon Trap
Here is where a cups to tablespoons converter earns its keep. A US tablespoon is 14.787 mL, which is why 16 of them make 236.6 mL — the US cup. But tablespoons are not the same size everywhere:
- US tablespoon: 14.79 mL
- UK / Canadian / Australian metric tablespoon: 15 mL
- Australian tablespoon (the old legal standard): 20 mL
- Australian cup: 250 mL
An Australian recipe calling for 1 cup assumes 250 mL; a US cup is 236.6 mL. The gap is about 5%, which is invisible in a soup and very visible in a cake. Worse, if you convert “1 cup” into 16 Australian tablespoons you get 320 mL — a third too much. The safe rule: if a recipe uses metric cups (250 mL) and also uses spoons, do not assume 16 tablespoons per cup. Use 12½.
Most modern Australian and UK cookbooks avoid the problem by writing weights, which is a good argument for following them.
16 Tablespoons of Flour Is Not 1 Cup of Flour
Volume conversions are exact for water and other thin liquids, and approximate for everything else. The cup is defined as a volume of space; the tablespoon is a separate defined volume. Filling a tablespoon and levelling it is a different physical act from scooping a level cup, and the difference shows up in how much ingredient you catch.
| Ingredient | 1 cup (grams) | 16 tbsp (grams) | Difference |
|---|---|---|---|
| Water | 237 g | 237 g | 0% |
| All-purpose flour | 120 g | ~112 g | −7% |
| Granulated sugar | 200 g | ~200 g | 0% |
| Brown sugar, packed | 213 g | ~205 g | −4% |
| Cocoa powder | 85 g | ~78 g | −8% |
| Butter, solid | 227 g | 227 g | 0% |
For flour and cocoa, the tablespoon route systematically catches less, because a spoon cannot hold a heaped dome as reliably as a cup can. That is a real 7% swing in a sponge cake. If a recipe needs precision, weigh it; if you must use spoons, spoon the flour into the spoon and level it with a straight edge rather than scooping — the same technique the cup method uses.
The Kitchen Measurement Converter handles this properly, because it applies each ingredient’s density instead of treating all volume as interchangeable.
Converting Backwards: Tablespoons to Cups
Going the other way is where this conversion becomes genuinely useful, because most recipes that use tablespoons use small counts, and you often want to know whether what you have is close to a handy cup measure.
- 4 tbsp = ¼ cup. This one is worth memorising on its own; it lets you swap a ¼-cup measure for a tablespoon in either direction.
- 8 tbsp = ½ cup, 12 tbsp = ¾ cup, 16 tbsp = 1 cup.
- 2 tbsp = ⅛ cup, which is the standard “one knob of butter” in older British recipes.
Anything that lands between these marks — 5 tbsp, 7 tbsp, 10 tbsp — is best left in tablespoons. Converting 7 tbsp into 0.4375 cups buys you nothing but a decimal.
Scaling Recipes That Are Written in Tablespoons
Doubling and halving a recipe breaks the tidy numbers. A half-batch of something calling for 3 tablespoons is 1½ tablespoons, which you measure as 1 tbsp + 1½ tsp. Tripling ⅓ cup gives 1 cup exactly, which is easy; tripling ¼ cup gives ¾ cup, also easy. The mess appears with odd tablespoon counts and with fractions of a cup.
Two habits make scaling painless. First, scale everything to grams before you multiply: 3 tbsp of butter is 42.6 g, and 1½ tablespoons is 21.3 g, which your scale reads without complaint. Second, when a scaled recipe produces an odd tablespoon count, let the Recipe Servings Calculator hold the original recipe and do the multiplication, rather than multiplying eight different lines in your head while the oven preheats.
If the scaling also changes the pan — a doubled cake batter needs a bigger tin — the Baking Pan Converter works out the equivalent diameter and depth so the batter depth stays the same and the bake time does not move.
Try Our Free Tools
Let the calculator do the arithmetic. The Kitchen Measurement Converter converts cups, tablespoons, teaspoons, millilitres, fluid ounces, and grams in both directions for sixteen common ingredients. The Recipe Servings Calculator rescales any ingredient list when the serving count changes, and the Conversion Chart is a printable one-page summary for the kitchen drawer. Free, no signup, instant.