This converter turns teaspoons into US fluid ounces instantly, using the exact factor 1 teaspoon = 0.1666666667 US fluid ounces. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The smallest standard kitchen measure, 4.93 millilitres. One eighth of a US cup, roughly 29.57 millilitres.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
teaspoons- The amount you are converting, measured in teaspoons
0.1666666667- The exact number of US fluid ounces in one teaspoon
US fluid ounces- The converted result
How it works, step by step
- Enter the number of teaspoons you want to convert.
- The value is multiplied by 0.1666666667, the exact conversion factor.
- The result is displayed in US fluid ounces, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 teaspoons
Multiply 5 by 0.16666667. That gives 0.833333 US fluid ounces. A quick sanity check: one teaspoon is smaller than one US fluid ounce, so the number should get smaller — and it does.
Converting 72 teaspoons
72 × 0.16666667 = 12 US fluid ounces. Working backwards, 12 ÷ 0.16666667 returns 72 teaspoons, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many US fluid ounces are in one teaspoon?
Exactly 0.1666666667. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert teaspoons to US fluid ounces?
Us Fluid Ounces = teaspoons × 0.1666666667. To reverse it, divide instead: teaspoons = US fluid ounces ÷ 0.1666666667, which is the same as multiplying by 6.
Is the teaspoon bigger than the US fluid ounce?
No. One teaspoon is only 0.166667 of a US fluid ounce, so the US fluid ounce is the larger unit.
Why does my answer differ slightly from other teaspoons to us-fluid-ounces converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a teaspoon?
The smallest standard kitchen measure, 4.93 millilitres.
What is a US fluid ounce?
One eighth of a US cup, roughly 29.57 millilitres.
Teaspoons to US fluid ounces reference table
| Teaspoons | Us Fluid Ounces |
|---|---|
| 0.5 tsp | 0.083333 fl oz |
| 1 tsp | 0.166667 fl oz |
| 2 tsp | 0.333333 fl oz |
| 3 tsp | 0.5 fl oz |
| 5 tsp | 0.833333 fl oz |
| 10 tsp | 1.6667 fl oz |
| 15 tsp | 2.5 fl oz |
| 20 tsp | 3.3333 fl oz |
| 25 tsp | 4.1667 fl oz |
| 50 tsp | 8.3333 fl oz |
| 75 tsp | 12.5 fl oz |
| 100 tsp | 16.6667 fl oz |
| 250 tsp | 41.6667 fl oz |
| 500 tsp | 83.3333 fl oz |
| 1000 tsp | 166.6667 fl oz |
Exact factor: 1 teaspoon = 0.1666666667 US fluid ounces. Values rounded for display.