1 2 Cup Plus 1 3 Cup: Exact Answer & Steps

What Is 1/2 Cup Plus 1/3 Cup? The Complete Guide to Adding Cooking Measurements

You're in the middle of a recipe, and it calls for "1/2 cup plus 1/3 cup" of something. Maybe it's flour for bread, sugar for a cake, or rice for dinner. Plus, you grab your measuring cups, and then you stop. How do you even measure that?

Here's the thing — you're not alone. Also, adding fractions in cooking is one of those skills nobody teaches you explicitly, but you figure out pretty quickly that you need it. In practice, the short answer is that 1/2 cup plus 1/3 cup equals 5/6 cup. But there's more to it than just the math, because actually measuring 5/6 of a cup in your kitchen is a whole different challenge.

Let me walk you through why this matters, how to do it, and some practical tricks that will make you faster in the kitchen.

What Is 1/2 Cup Plus 1/3 Cup?

The math is straightforward once you see it. You're adding two fractions:

• 1/2 = 3/6
• 1/3 = 2/6

Add them together: 3/6 + 2/6 = 5/6

So the total is 5/6 cup.

That's the simple answer. When you know that you're essentially combining a little more than half a cup with a third of a cup, you can visualize it better. But here's what most people miss — understanding the why behind the math makes it easier to apply in real cooking situations. And visualization matters when you're standing at the counter with flour on your hands.

Converting to Decimals

Some people think in decimals rather than fractions. If that sounds like you, here's the quick version:

• 1/2 cup = 0.5 cups
• 1/3 cup ≈ 0.333 cups
• 5/6 cup ≈ 0.833 cups

That's about 83% of a full cup. Keep that number in mind — it'll come in handy when we talk about measuring techniques.

Why These Frequencies Show Up in Recipes

Recipes often call for 1/2 cup plus 1/3 cup because it adds up to a useful amount that isn't easily measured with standard cup increments. Your typical measuring cup set includes 1/4, 1/3, 1/2, and 1 cup measurements. But 5/6? That's not a standard size.

This is by design, somewhat. That said, many recipes were developed using weight measurements (especially baking) and then converted to volume measurements for home cooks. So the result is combinations that make mathematical sense but practical sense? That's where it gets tricky.

Why It Matters in Cooking

Here's the deal — getting this wrong won't ruin every recipe. Here's the thing — if you're making a soup and you add a little too much broth, it's fine. Practically speaking, you can adjust. But in baking? Precision matters more than most people realize.

Baking vs. Cooking

In baking, ratios are everything. Plus, too much flour and your cookies spread thin and crispy. Too much sugar and they burn before the center cooks through. Now, when a recipe calls for 1/2 cup plus 1/3 cup of flour, that specific amount was tested. The author knows that 5/6 cup of flour, combined with the other ingredients at their specified amounts, produces a particular result.

Cooking (savory dishes) is more forgiving. You can usually taste and adjust as you go. But baking is chemistry, and chemistry doesn't forgive guesswork.

Portion Control and Meal Prep

If you're meal prepping or watching portions, knowing how to add these measurements accurately matters. Maybe you're dividing a recipe in half or scaling it up. Understanding how fractions work helps you make those adjustments without ending up with too much or too little.

How to Measure 5/6 Cup in Practice

Now for the part that actually matters in your kitchen. Now, you need to measure 5/6 of a cup, and you don't have a 5/6 cup measuring cup. What do you do?

Method 1: The Two-Cup Approach

Fill your 1/2 cup measure, then add 1/3 cup. This is the most direct way — you're literally doing exactly what the recipe says. It's not wrong, it's just two steps instead of one.

Method 2: The Visual Shortcut

Fill a 1 cup measure 5/6 of the way full. Even so, fill five of them. Even so, how do you know where 5/6 is? Here's a trick: imagine the cup divided into six equal sections. In practice, this means filling the cup just slightly less than the top — leave about a finger's width of space at the rim.

Method 3: The Conversion to Tablespoons

If you have tablespoon measures handy, this is incredibly precise. One cup = 16 tablespoons. So:

• 5/6 cup = (5/6) × 16 = 13.33 tablespoons

That's 13 tablespoons plus 1 teaspoon. Most people can measure that accurately with a standard tablespoon set.

For more on this topic, read our article on words that begin with out or check out why are black women so fat.

Method 4: Use a Scale (Best for Baking)

Here's what serious bakers do — they weigh ingredients. ) and measure by weight instead of volume. But if you have a kitchen scale, look up the weight of your ingredient (flour, sugar, etc. This bypasses the whole fraction problem entirely.

Take this: one cup of all-purpose flour weighs about 120 grams. So 5/6 cup would be roughly 100 grams. Different ingredients have different weights per cup, so you'd need to look up each one, but the accuracy is worth it for baking.

Common Mistakes People Make

Guessing and Eyeballing

The biggest mistake is just eyeballing it and hoping for the best. On the flip side, "It looks about right" is the enemy of consistent cooking. If you're making something that matters — a birthday cake, a bread recipe, anything you're serving to people — take the time to measure accurately.

Using the Wrong Measuring Cup

Liquid measuring cups and dry measuring cups are different. For dry ingredients like flour, sugar, and rice, use dry measuring cups (the ones you fill and level off). But for liquids, use a clear liquid measuring cup with a spout. Using the wrong type affects accuracy.

Not Leveling Off

Speaking of leveling off — this matters more than most people think. That's huge. A heaping cup of flour can have 25% more flour than a level cup. Always level off your dry measurements with a knife or spatula.

Confusing 1/3 and 1/2

In a rush, it's easy to grab the wrong measuring cup. In practice, double-check before you add. This sounds obvious, but in a busy kitchen with distractions, it happens all the time.

Practical Tips for Fractional Measurements

Buy a Good Set of Measuring Cups

A quality set will include 1/4, 1/3, 1/2, and 1 cup measures. Some sets also include 2/3 and 3/4 cups. If you bake often, a comprehensive set is worth the small investment.

Mark Your Own 5/6 Cup

If you use a particular ingredient frequently, fill a container to 5/6 cup and mark the level with a piece of tape or a dry-erase marker. You'll never have to calculate again.

Learn the Most Common Combinations

Recipes call for certain combinations frequently. Here's a quick reference:

• 1/2 + 1/4 = 3/4 cup
• 1/3 + 1/4 = 7/12 cup (about 1/2 cup plus 1 tablespoon)
• 1/2 + 1/3 = 5/6 cup
• 1/4 + 1/4 = 1/2 cup

Knowing these automatically saves time and mental effort.

When in Doubt, Scale It Out

I mentioned this before, but it's worth repeating: if you're serious about baking accuracy, a kitchen scale changes everything. Still, you weigh ingredients in grams or ounces, and the fractions disappear. It's cleaner, more accurate, and once you get used to it, faster.

FAQ

What is 1/2 cup plus 1/3 cup as a decimal?

1/2 cup plus 1/3 cup equals approximately 0.833 cups, or about 83% of a full cup.

How many tablespoons is 5/6 cup?

5/6 cup equals 13 tablespoons plus 1 teaspoon.

Can I just use 3/4 cup instead of 5/6 cup?

It's close, but not exact. 75 cups, while 5/6 cup is about 0.Day to day, 833 cups — that's roughly a 10% difference. In real terms, 3/4 cup is 0. In most recipes, you'll notice the result.

What's the easiest way to measure 5/6 cup?

The simplest method is to fill your 1/2 cup measure, then add 1/3 cup to it. Or fill a 1 cup measure about 5/6 full — just under the rim.

Why do recipes use these awkward measurements?

Many recipes originated with weight measurements and were converted to volume for home cooks. The math works out to amounts that aren't always convenient for standard measuring cup sets.

The Bottom Line

When your recipe says 1/2 cup plus 1/3 cup, you're dealing with 5/6 cup. It's not a standard measurement, which is why it feels awkward. But now you know exactly what to do — measure a 1/2 cup, then add a 1/3 cup, or use one of the other tricks to get that 5/6 cup amount.

The key is taking the extra step. Don't guess, don't eyeball, don't just pour "about enough." Measure it right, and your food will turn out the way the recipe intends. That's the difference between cooking that works and cooking that wows.