Half of 1/2 Cup (and Every Other Measurement)

The short answer: half of 1/2 cup is 1/4 cup

Half of 1/2 cup is 1/4 cup. In smaller measures that is 4 tablespoons, 12 teaspoons, 2 fluid ounces or about 59 milliliters.

The reason is simple. One cup is 16 tablespoons, so 1/2 cup is 8 tablespoons, and half of 8 is 4. Halving is just dividing by two, and because cooking measures nest neatly, 1 cup = 16 tbsp = 48 tsp, you can always drop to a smaller spoon when the cup you need does not exist.

That is the trick that makes halving easy in practice: you almost never need a 1/4-cup measure, because half of 1/2 cup is 4 tablespoons and everyone owns a tablespoon. This calculator does the same trick for any amount and any unit. Halve, third or quarter a recipe and see the answer in cups, tablespoons, teaspoons and milliliters at the same time. Everything runs in your browser, nothing you type is uploaded or stored.

How to halve any measurement

Halving a recipe means dividing every ingredient by two. For most ingredients that is one division, but the units make it look harder than it is. Learn these four anchors and the arithmetic disappears:

• 1 cup = 16 tablespoons = 48 teaspoons
• 1/2 cup = 8 tablespoons = 24 teaspoons
• 1/4 cup = 4 tablespoons = 12 teaspoons
• 1 tablespoon = 3 teaspoons

Now halve anything by dropping to a smaller unit first. Half of 3/4 cup: 3/4 cup is 12 tablespoons, so the answer is 6 tablespoons. Half of 2/3 cup: 2/3 cup is 10 2/3 tablespoons, so half is 5 1/3 tablespoons, or 5 tablespoons plus 1 teaspoon. Half of 1/3 cup: that is 16 teaspoons, so half is 8 teaspoons, or 2 tablespoons plus 2 teaspoons.

Two habits make this fast in a real kitchen. First, convert to the smallest spoon you own, divide, then step back up if it lands cleanly. Second, write the new amounts down before you start cooking, because mental math in the middle of a recipe is where mistakes happen. A cheap kitchen scale removes the problem entirely for baking: half of 270 g of flour is 135 g, no fractions required.

Worked example: halving a cookie recipe

Take a standard chocolate chip cookie recipe that makes 24 cookies and cut it to 12. Here is every ingredient, halved.

• 2 1/4 cups flour → 1 1/8 cups, which is 1 cup + 2 tablespoons (an 1/8 cup is exactly 2 tbsp)
• 1 teaspoon baking soda → 1/2 teaspoon
• 1/2 cup butter → 1/4 cup = 4 tablespoons
• 3/4 cup sugar → 3/8 cup = 6 tablespoons
• 1 egg → half an egg, beaten (about 1 1/2 tablespoons)
• 1 teaspoon vanilla → 1/2 teaspoon

Notice how often the answer lands on a whole number of tablespoons. Half of 1/2 cup is 4 tbsp, half of 3/4 cup is 6 tbsp, and half of 1/4 cup is 2 tbsp. The one that looks awkward, 1 1/8 cups of flour, is a clean 1 cup + 2 tablespoons, because 1/8 cup is 2 tablespoons. That is the whole art of halving: express the result in the smallest unit that makes it tidy.

If you bake by weight instead, the fractions vanish. 270 g of flour halves to 135 g, 150 g of sugar halves to 75 g, and 113 g of butter halves to 56.5 g. Weighing also beats scooping for consistency, because a cup of flour can weigh anywhere from 120 g to 150 g depending on how it is packed.

Half, third and quarter of common amounts

This table covers the amounts you meet most often. The half column is the one people search for, but cutting a recipe to a third or a quarter comes up just as much.

Read the table in tablespoons whenever a fraction looks ugly. Every value above is exact, but the spoon versions are the ones you can measure. The King Arthur Baking measurement chart lists weight equivalents for common ingredients if you would rather work in grams and skip the fractions altogether.

Halving awkward amounts: eggs, 1/3 cup and odd numbers

Some ingredients do not halve cleanly, and forcing them can ruin a batch.

• Eggs. Beat one egg and use half by volume. A large egg is about 3 1/4 tablespoons, so half is roughly 1 1/2 tablespoons. In cookies and quick breads, one small egg instead of half a large one works fine.
• 1/3 cup and 2/3 cup. These do not land on a cup or a tablespoon. Half of 1/3 cup is 8 teaspoons, and half of 2/3 cup is 5 tablespoons plus 1 teaspoon. Measure with spoons, not cups.
• Leaveners and salt. Halve these exactly. Baking soda, baking powder and salt are the ingredients where a loose guess shows up in the final texture and taste.
• Spices and extracts. Halve, then taste. Cinnamon, nutmeg and vanilla are more forgiving than leaveners, so a slight overshoot is harmless.
• Pan size and bake time. Halving a recipe usually means a smaller pan, not a shorter bake. A halved cake in a smaller tin bakes for about the same time at the same temperature, so test with a toothpick.

One more rule of thumb: liquid and dry ingredients halve the same way, but the risk is not the same. Getting flour slightly wrong rarely matters; getting baking powder wrong by a factor of two does. For the standard measures behind all of this, the USDA and the FDA publish the food-measurement and nutrition references that recipe charts are built on.

What if you need to double instead?

Doubling is the same arithmetic in reverse, and it is easier because you can always step up a unit instead of down. Half a cup doubled is 1 cup, a third of a cup doubled is 2/3 cup, and 3/4 cup doubled is 1 1/2 cups. In the calculator above, divide by 1 and read the tablespoons and cups columns, or double each ingredient as you go.

Two cautions when you scale up. First, most recipes do not double perfectly. Leavening, salt and strong spices often need less than double, so start around 1.5 times for those and taste as you go. Second, pan size and bake time change: a doubled cake needs a larger pan and often a slightly longer, slightly cooler bake so the center sets before the edges scorch. A doubled batch of cookies is usually fine on the same trays, just baked in two rounds.

The same idea works in both directions. Halving is useful when a recipe makes more than you will eat, and doubling is useful when you are feeding a crowd or freezing a second batch. Either way, the numbers are just division and multiplication, the only thing worth memorizing is that 1 cup is 16 tablespoons, and everything else follows from there.