How Many Tablespoons in a Third Cup? | Simple Conversion

One third of a US cup equals 5 tablespoons plus 1 teaspoon, or exactly 5.33 tablespoons.

You’re mid-recipe, the measuring cup says 1/3 cup, and your tablespoon is dirty in the sink. The conversion that saves the dish is straightforward: grab your tablespoon measure and a teaspoon. Understanding why and how this works — across different measuring systems — keeps your baking consistent every time.

The Exact Conversion: 1/3 Cup to Tablespoons

In US customary measurement, one standard cup holds 16 tablespoons. This is the fixed starting point for any cup-to-tablespoon conversion. To find the number of tablespoons in 1/3 cup, you multiply: 1/3 × 16 = 5.33 tablespoons. In practical kitchen terms, that decimal splits into 5 whole tablespoons plus 1 extra teaspoon. Here’s the step-by-step you’d actually use at the counter:

• Measure out 5 level tablespoons of your ingredient.
• Add 1 level teaspoon. (Three teaspoons make a tablespoon, so 0.33 of a tablespoon is exactly 1 teaspoon.)
• Result: 5 tbsp + 1 tsp.

That single teaspoon matters — skipping it loses roughly 3.3 percent of the volume, which can throw off the texture of baked goods like cakes or cookies. For a quick-simmering sauce, rounding to 5 tablespoons alone usually works fine.

Volume Equivalents and Weight Caveats

If your recipe uses metric measures instead, 1/3 cup works out to approximately 79–80 milliliters. That’s the same 79–80 mL whether you’re measuring flour, sugar, or water — volume is volume. Weight, however, depends entirely on the ingredient’s density. For water only, 1/3 cup weighs roughly 75.7 grams. Butter, oil, honey, or flour will each weigh something different for the same 1/3-cup volume. Never assume a volume-to-weight conversion transfers between ingredients.

Avoiding the Two Most Common Mistakes

The first mistake is grabbing 6 tablespoons. That would be the right number for an imperial cup — the older UK standard that holds about 284 mL — but most modern US recipes use the US customary cup of 240 mL. Six tablespoons is nearly 13 percent too much for a US 1/3 cup.

The second mistake is trusting the decimal 5.33 tablespoons without adding the teaspoon. Some cooks round 5.33 down to 5 even, or up to 5.5. The correct remaining fraction — 0.33 of a tablespoon — equals exactly one teaspoon. Using 5.5 tablespoons means adding half a tablespoon (1.5 teaspoons) instead of just 1 teaspoon, which overfills the measure.

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