Tablespoons to Cups: A Quick Reference

This is one of those conversions I look up constantly despite, in theory, knowing it. There's just something about being mid-recipe with wet hands that erases basic arithmetic from your brain. So — bookmark-worthy reference below, no judgment.

The Core Numbers

Why ⅔ and ⅓ Cup Don't Divide Evenly

A cup is 16 tablespoons, and 16 doesn't divide cleanly by 3 — that's the entire reason ⅓ cup and ⅔ cup end up with an awkward "+1 tsp" or "+2 tsp" tacked on. There's no rounder way to express it; it's just how the math falls out. If you're measuring by eye and a teaspoon here or there won't make or break the recipe, rounding to the nearest tablespoon is usually fine.

Tablespoons to Teaspoons, While We're At It

Since these two units travel together constantly: 1 tablespoon equals 3 teaspoons, flat. Unlike the cup breakdown above, this one's clean — useful to have memorized since it comes up in almost every recipe with small quantities of spices, baking soda, or vanilla.

A Faster Way to Think About It

If mental math isn't your thing mid-recipe (it isn't mine either), it helps to just remember the two anchor points: 16 tablespoons to a cup, 3 teaspoons to a tablespoon. Everything else in this table falls out of those two facts, so if you forget a specific row, you can rebuild it from there.

Does This Differ Outside the US?

Slightly. A US tablespoon is 14.8ml; an Australian tablespoon is notably larger at 20ml, which throws off any conversion table built on US measurements. If you're using an Australian recipe or an Australian measuring spoon set, don't assume the numbers above transfer directly — see our metric vs imperial guide for the regional differences.

A Worked Example

Recipe wants ⅔ cup oil, and you only have a tablespoon to measure with (no cup in sight). ⅔ cup is 10 tablespoons plus 2 teaspoons — or, if you'd rather not deal with teaspoons at all, just round to 10½ tablespoons; the difference is small enough not to matter for oil.

FAQ

Is a "tablespoon" the same as a soup spoon from my cutlery drawer?
Not reliably — cutlery spoons vary a lot in size. Use an actual measuring spoon for anything where the amount matters.

Why do some recipes write "Tbsp" and others "tbsp"?
Purely stylistic — capitalization doesn't change the unit. Some style guides capitalize tablespoon (Tbsp) to visually distinguish it from teaspoon (tsp) at a glance.

What's the fastest way to double-check a conversion mid-recipe?
Our conversion tool handles this instantly if you have your phone nearby — enter the amount and get tablespoons, cups, or millilitres without doing the math yourself.