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One teaspoon is 1/6 of a US fluid ounce, or about 0.17 fl oz. Put another way, there are 6 teaspoons in 1 fluid ounce. If you mean weight instead of volume, one teaspoon of water weighs about 0.17 ounces (4.9 grams), but dry ingredients like flour, sugar and salt all weigh different amounts per teaspoon.
"One teaspoon, how many ounces?" sounds like a simple question, but it trips people up because the word "ounce" can mean two different things. A fluid ounce measures volume, and a regular ounce measures weight. This guide explains both, gives you charts for quick conversions, and shows how to measure accurately at home.
One Teaspoon, How Many Ounces? The Quick Math
In the US system, the small volume units build on each other in a neat pattern:
- 3 teaspoons = 1 tablespoon
- 2 tablespoons = 1 fluid ounce
- So 6 teaspoons = 1 fluid ounce
That means:
- 1 teaspoon = 1/6 fl oz = 0.1667 fl oz
- 1 fluid ounce = 6 teaspoons
In milliliters, one US teaspoon is 4.93 ml and one US fluid ounce is 29.57 ml. Divide 4.93 by 29.57 and you get the same 0.1667. If you are working with metric recipes, our guide to 5 ml to teaspoon covers the milliliter side in detail.
Fluid Ounces vs. Ounces: Why It Matters
This is where most confusion comes from.
- Fluid ounces (fl oz) measure how much space something takes up. Use them for water, milk, oil, vanilla, syrups and other liquids.
- Ounces (oz) measure how heavy something is. Use them when a recipe or package lists ingredients by weight, which is common for flour, sugar, chocolate, meat and cheese.
For water and liquids with a similar density, the two line up closely: 1 fluid ounce of water weighs about 1.04 ounces. But for dry ingredients, they do not. A fluid ounce of flour weighs far less than an ounce, while a fluid ounce of honey weighs more. That is why a teaspoon of salt and a teaspoon of flour have very different weights even though they take up the same space.
Teaspoons to Fluid Ounces Conversion Chart
Use this chart for liquids. Values are for US measurements.
| Teaspoons | Tablespoons | Fluid ounces | Milliliters |
|---|---|---|---|
| 1/4 tsp | 1/12 tbsp | 0.04 fl oz | 1.23 ml |
| 1/2 tsp | 1/6 tbsp | 0.08 fl oz | 2.46 ml |
| 1 tsp | 1/3 tbsp | 0.17 fl oz | 4.93 ml |
| 2 tsp | 2/3 tbsp | 0.33 fl oz | 9.86 ml |
| 3 tsp | 1 tbsp | 0.5 fl oz | 14.79 ml |
| 4 tsp | 1 1/3 tbsp | 0.67 fl oz | 19.72 ml |
| 6 tsp | 2 tbsp | 1 fl oz | 29.57 ml |
| 12 tsp | 4 tbsp | 2 fl oz | 59.15 ml |
| 24 tsp | 8 tbsp | 4 fl oz | 118.29 ml |
| 48 tsp | 16 tbsp | 8 fl oz (1 cup) | 236.59 ml |
Fluid Ounces to Teaspoons
Going the other way, multiply fluid ounces by 6:
- 1/4 fl oz = 1 1/2 teaspoons
- 1/2 fl oz = 3 teaspoons (1 tablespoon)
- 1 fl oz = 6 teaspoons
- 2 fl oz = 12 teaspoons
- 4 fl oz = 24 teaspoons (1/2 cup)
- 8 fl oz = 48 teaspoons (1 cup)
This is useful when a drink or cocktail recipe lists small amounts in ounces, like 1/2 ounce of syrup, and you only have measuring spoons. Half an ounce is simply one tablespoon.
How Much Does One Teaspoon Weigh in Ounces?
If your recipe or nutrition goal is by weight, the answer depends on the ingredient. These are typical approximate weights for a level US teaspoon. Brands, humidity and how you fill the spoon all change the result, so treat them as a guide.
| Ingredient (1 level tsp) | Grams | Ounces (weight) |
|---|---|---|
| Water | 4.9 g | 0.17 oz |
| Milk | 5.1 g | 0.18 oz |
| Vegetable oil | 4.5 g | 0.16 oz |
| Honey | 7 g | 0.25 oz |
| Granulated sugar | 4.2 g | 0.15 oz |
| Table salt | 6 g | 0.21 oz |
| All-purpose flour | 2.6 g | 0.09 oz |
| Baking soda | 4.6 g | 0.16 oz |
| Ground cinnamon | 2.6 g | 0.09 oz |
Notice that a teaspoon of table salt weighs more than twice as much as a teaspoon of flour. That is the reason bakers who want consistent results often weigh ingredients instead of using spoons for larger amounts.
Do UK and US Teaspoons Give Different Ounces?
Slightly. A US fluid ounce is 29.57 ml, while a UK imperial fluid ounce is 28.41 ml. A modern UK teaspoon is a metric 5 ml. So:
- 1 US teaspoon = 0.167 US fl oz
- 1 metric teaspoon (5 ml) = 0.169 US fl oz, or 0.176 UK fl oz
For everyday cooking these differences are too small to notice. They only matter if you are scaling a recipe up dramatically.
How to Measure One Teaspoon Accurately
Knowing the conversion only helps if your measuring is accurate too.
- Use a proper measuring spoon. Silverware teaspoons are not standardized and can hold a lot more or less than a real teaspoon.
- Fill liquids to the rim. Hold the spoon level over a small bowl and pour until the liquid reaches the edge.
- Level dry ingredients. Scoop, then sweep off the excess with a straight edge. Do not pack flour or spices unless the recipe says to.
- Use the right fraction. For less than a teaspoon, use the proper fractional spoon. Our guides to measuring 3/8 teaspoon, 1/16 of a teaspoon and 1/8 of a teaspoon cover the trickier ones.
- Count drops for tiny liquid amounts. For extracts and food coloring, see how many drops are in a teaspoon.
A durable stainless steel set with engraved markings will outlast plastic spoons with printed numbers. Our guide to magnetic measuring spoons covers sets that include the small sizes. To browse sets, you can Check price on Amazon.
If you want to measure by weight in ounces or grams, a small digital kitchen scale that reads to 1 gram or 0.05 ounces is the most accurate way to go. You can Check price on Amazon.
Handy Volume Equivalents to Remember
- 1 teaspoon = 1/3 tablespoon = 1/6 fl oz = 4.93 ml
- 1 tablespoon = 3 teaspoons = 1/2 fl oz = 14.79 ml
- 2 tablespoons = 6 teaspoons = 1 fl oz = 29.57 ml
- 1/4 cup = 4 tablespoons = 12 teaspoons = 2 fl oz
- 1 cup = 16 tablespoons = 48 teaspoons = 8 fl oz
If you ever need to split a tablespoon, our guide on how to measure half a tablespoon shows the easy way: 1 1/2 teaspoons.
Frequently Asked Questions
How many ounces is one teaspoon?
One teaspoon is 1/6 of a fluid ounce, or about 0.17 fl oz. By weight, a teaspoon of water is about 0.17 ounces, but dry ingredients vary.
How many teaspoons are in an ounce?
There are 6 teaspoons in 1 US fluid ounce.
How many teaspoons are in half an ounce?
Half a fluid ounce is 3 teaspoons, which is the same as 1 tablespoon.
Is a teaspoon 1 oz?
No. A teaspoon is much smaller than an ounce. It takes 6 teaspoons to make 1 fluid ounce.
How many ounces are in 2 teaspoons?
2 teaspoons is 1/3 of a fluid ounce, or about 0.33 fl oz.
How many ounces is a teaspoon of sugar?
A level teaspoon of granulated sugar weighs about 4.2 grams, or 0.15 ounces.
Conclusion
So, one teaspoon, how many ounces? By volume, one teaspoon is 1/6 of a fluid ounce (about 0.17 fl oz), and 6 teaspoons make 1 fluid ounce. By weight, it depends on the ingredient, from about 0.09 ounces for flour to 0.25 ounces for honey. Keep the charts above handy and use real measuring spoons, and your conversions will be spot on every time.
