Decimal Tablespoon to Teaspoon

Updated June 2026

teaspoons = tablespoons × 3

Exact in the US & UK. In Australia, multiply by 4 (20 ml tablespoon).

Saw 0.3 tbsp in a recipe and need the teaspoon equivalent? Decimal tablespoons come from recipe scalers and nutrition apps that multiply the original amount and print the raw number instead of rounding to a measuring spoon. Multiply any decimal tablespoon by 3 to get teaspoons. The table below gives every common decimal value, its exact teaspoon figure, the millilitres, and the closest standard spoon you can actually measure. Tap any value for its full page.

TablespoonsTeaspoonsmlClosest spoon to measure
0.1 tbsp0.3 tsp1.51/4 tsp (a little more)
0.2 tbsp0.6 tsp3.01/2 tsp (a little more)
0.25 tbsp0.75 tsp3.71/2 tsp + 1/4 tsp (exact)
0.3 tbsp0.9 tsp4.41 tsp (a little less)
0.33 tbsp0.99 tsp4.91 tsp (a little less)
0.4 tbsp1.2 tsp5.91 tsp + 1/4 tsp (a little less)
0.5 tbsp1.5 tsp7.41 tsp + 1/2 tsp (exact)
0.6 tbsp1.8 tsp8.91 tsp + 1/2 tsp + 1/4 tsp (a little more)
0.67 tbsp2.01 tsp9.92 tsp (a little more)
0.7 tbsp2.1 tsp10.42 tsp (a little more)
0.75 tbsp2.25 tsp11.12 tsp + 1/4 tsp (exact)
0.8 tbsp2.4 tsp11.82 tsp + 1/2 tsp (a little less)
0.9 tbsp2.7 tsp13.32 tsp + 1/2 tsp + 1/4 tsp (a little less)

Teaspoon figures are exact (tablespoons × 3). Millilitres use the NIST US tablespoon (14.7868 ml). “Closest spoon” rounds to the nearest quarter-teaspoon you can level off; values marked exact land precisely on standard measuring spoons.

Convert any decimal tablespoon

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Where decimal tablespoons come from

You rarely write 0.3 tablespoon by hand. The decimal shows up when software does the arithmetic for you: a recipe scaler halving or thirding a batch, a meal-prep app dividing a sauce across portions, or a nutrition tracker reporting an ingredient by volume. Each multiplies the original tablespoon figure and prints the result to one or two decimal places. The number is precise, but it does not map onto a real measuring spoon, which is the gap this chart closes: it pairs the exact teaspoon value with the closest spoon you can level off in a hurry. The clean round-trips are worth memorising: 0.25 tbsp = 1/4 tbsp, 0.5 tbsp = 1/2 tbsp, 0.75 tbsp = 3/4 tbsp, and 0.33 / 0.67 tbsp are practical stand-ins for 1/3 and 2/3 tablespoon (1 and 2 teaspoons).

Common Questions

How do I convert a decimal tablespoon to teaspoons?
Multiply the decimal tablespoon by 3. The US and UK ratio is exactly 3 teaspoons per tablespoon, so 0.3 tablespoon is 0.3 x 3 = 0.9 teaspoon and 0.4 tablespoon is 1.2 teaspoons. In Australia multiply by 4 instead, because the Australian tablespoon is 20 ml.
Why does a recipe say 0.3 tablespoon instead of a fraction?
Decimal tablespoons almost always come from a recipe scaler or a nutrition-tracking app. When you halve, third, or 1.5x a recipe, the software multiplies the original tablespoon amount and prints the raw decimal rather than rounding to the nearest measuring spoon. 0.3 tablespoon, for example, is what you get scaling 1 tablespoon down to roughly a third.
What is the closest spoon to 0.3 tablespoon?
0.3 tablespoon is 0.9 teaspoon, which is just under 1 teaspoon. A level teaspoon left a hair short is close enough for non-baking uses. For precision baking, the exact figure is 0.9 teaspoon.
Are 0.25, 0.5 and 0.75 tablespoon the same as the fractions?
Yes. 0.25 tablespoon equals 1/4 tablespoon (3/4 teaspoon), 0.5 equals 1/2 tablespoon (1.5 teaspoons) and 0.75 equals 3/4 tablespoon (2.25 teaspoons). The decimal and fraction notations describe the identical quantity; recipe scalers tend to output the decimal form.
Is 0.33 tablespoon the same as 1/3 tablespoon?
Almost. 1/3 tablespoon is exactly 1 teaspoon. 0.33 tablespoon is 0.99 teaspoon, a rounding of one-third, so for kitchen purposes treat 0.33 tablespoon as 1 teaspoon. The same applies to 0.67 tablespoon, which is 2.01 teaspoons or effectively 2 teaspoons.

Related Pages

tbsp to tsp Converter3/4 tbsp to tspKitchen ChartAustralia Guide

Updated 2026-06-09