Convert fluid ounces to US teaspoons instantly. Free calculator, full reference chart, fractions guide, and kitchen examples — accurate, no sign-up needed.
Quick Answer: 1 US fluid ounce = 6 US teaspoons. Multiply any fl oz value by 6 to get teaspoons. Common values: ½ oz = 3 tsp · 1 oz = 6 tsp · 2 oz = 12 tsp · 4 oz = 24 tsp · 8 oz = 48 tsp · 16 oz = 96 tsp.
Formula: teaspoons = fl oz × 6 (US customary)
Teaspoons = Fluid Ounces × 6
Fluid Ounces = Teaspoons ÷ 6
One US fluid ounce equals exactly 6 US teaspoons. This relationship comes directly from the US customary hierarchy: 1 fl oz = 2 tablespoons, and 1 tablespoon = 3 teaspoons, so 1 fl oz = 2 × 3 = 6 teaspoons. The multiplier is always 6 — making this one of the most useful mental-math conversions in any kitchen. To go in the other direction, divide teaspoons by 6 to get fluid ounces.
This oz to teaspoon conversion chart covers the most practical range — from small fractional ounces used in recipes to larger volumes you might encounter when scaling a formula. Each row also shows the tablespoon equivalent, since tablespoons and teaspoons are used interchangeably in many recipes.
| Fluid Ounces (fl oz) | Teaspoons (tsp) | Tablespoons (tbsp) | Common Reference |
|---|---|---|---|
| ⅛ fl oz | 0.75 tsp | ¼ tbsp | small dash |
| ¼ fl oz | 1.5 tsp | ½ tbsp | — |
| ⅓ fl oz | 2 tsp | ⅔ tbsp | — |
| ½ fl oz | 3 tsp | 1 tbsp | 1 tablespoon |
| ¾ fl oz | 4.5 tsp | 1½ tbsp | — |
| 1 fl oz | 6 tsp | 2 tbsp | 2 tablespoons |
| 1.5 fl oz | 9 tsp | 3 tbsp | standard shot glass |
| 2 fl oz | 12 tsp | 4 tbsp | ¼ cup |
| 3 fl oz | 18 tsp | 6 tbsp | — |
| 4 fl oz | 24 tsp | 8 tbsp | ½ cup |
| 5 fl oz | 30 tsp | 10 tbsp | — |
| 6 fl oz | 36 tsp | 12 tbsp | ¾ cup / coffee cup |
| 7 fl oz | 42 tsp | 14 tbsp | — |
| 8 fl oz | 48 tsp | 16 tbsp | 1 cup |
| 10 fl oz | 60 tsp | 20 tbsp | 1¼ cups |
| 12 fl oz | 72 tsp | 24 tbsp | 1½ cups / soda can |
| 14 fl oz | 84 tsp | 28 tbsp | — |
| 15 fl oz | 90 tsp | 30 tbsp | — |
| 16 fl oz | 96 tsp | 32 tbsp | 1 pint / 2 cups |
| 18 fl oz | 108 tsp | 36 tbsp | — |
| 20 fl oz | 120 tsp | 40 tbsp | 2½ cups |
| 25 fl oz | 150 tsp | 50 tbsp | — |
| 32 fl oz | 192 tsp | 64 tbsp | 1 quart |
| 40 fl oz | 240 tsp | 80 tbsp | — |
| 48 fl oz | 288 tsp | 96 tbsp | 6 cups |
| 64 fl oz | 384 tsp | 128 tbsp | ½ gallon |
Recipes — particularly those for sauces, spice blends, and extracts — frequently call for fractional fluid ounce amounts. These conversions tend to trip people up because the result is not always a whole teaspoon. A value of 0.8 oz equals 4.8 teaspoons, meaning 4 teaspoons plus approximately ¾ of another teaspoon. Similarly, 0.3 oz equals 1.8 teaspoons — practically 1¾ teaspoons. When precision matters, use the calculator above; when cooking allows rounding, use the nearest ¼ teaspoon increment.
| Fluid Ounces | Exact Teaspoons | Nearest ¼ tsp | Also Equals |
|---|---|---|---|
| 0.1 fl oz | 0.6 tsp | ½ tsp | — |
| 0.2 fl oz | 1.2 tsp | 1¼ tsp | — |
| 0.25 fl oz (¼ oz) | 1.5 tsp | 1½ tsp | ½ tablespoon |
| 0.3 fl oz | 1.8 tsp | 1¾ tsp | — |
| 0.333 fl oz (⅓ oz) | 2 tsp | 2 tsp (exact) | — |
| 0.5 fl oz (½ oz) | 3 tsp | 3 tsp (exact) | 1 tablespoon |
| 0.75 fl oz (¾ oz) | 4.5 tsp | 4½ tsp | 1½ tablespoons |
| 0.8 fl oz | 4.8 tsp | 4¾ tsp | — |
| 1.0 fl oz | 6 tsp | 6 tsp (exact) | 2 tablespoons |
| 1.5 fl oz | 9 tsp | 9 tsp (exact) | 3 tablespoons |
| 2.5 fl oz | 15 tsp | 15 tsp (exact) | 5 tablespoons |
| 17 fl oz | 102 tsp | 102 tsp (exact) | 34 tablespoons |
Kitchen shortcut: Because ½ oz = exactly 1 tablespoon (3 teaspoons), you can convert any fl oz value to tablespoons first (multiply by 2), then to teaspoons (multiply by 3). For whole-number oz: 1 oz = 2 tbsp = 6 tsp; 2 oz = 4 tbsp = 12 tsp; and so on. If your recipe uses tablespoons and you only have a teaspoon measure, every tablespoon is simply 3 teaspoons.
The teaspoon is the smallest standard unit in the US volume hierarchy. Understanding exactly where it sits makes every upward conversion — to tablespoons, cups, pints, and beyond — a single multiplication step.
| Unit | Teaspoons | Tablespoons | Fluid Ounces | Cups |
|---|---|---|---|---|
| 1 teaspoon | 1 | ⅓ | 0.167 | 0.0208 |
| 1 tablespoon | 3 | 1 | 0.5 | 0.0625 |
| 1 fluid ounce | 6 | 2 | 1 | 0.125 |
| 1 cup | 48 | 16 | 8 | 1 |
| 1 pint | 96 | 32 | 16 | 2 |
| 1 quart | 192 | 64 | 32 | 4 |
| 1 gallon | 768 | 256 | 128 | 16 |
One gallon contains 768 teaspoons — a number that rarely comes up in cooking but useful for large-batch manufacturing and food service scaling. For everyday use, the relationship to remember is 1 fl oz = 6 tsp = 2 tbsp. For conversions that step up to cups, the oz to cups converter covers those directly, and for milliliter-based measurements the oz to ml converter handles the metric side.
The oz to teaspoon conversion on this page applies to fluid ounces and liquid measurements. When recipes list a dry ingredient in ounces — baking soda, salt, cream of tartar, cocoa — those are weight ounces, not fluid ounces. The teaspoon equivalent of a dry weight ounce depends entirely on the ingredient's density.
This table answers the common question of how many dry oz are in a teaspoon for common baking ingredients. These are weight values — the kind that appear on a kitchen scale, not a liquid measuring cup:
| Ingredient | Weight per 1 tsp | Weight per 1 fl oz (6 tsp) | Notes |
|---|---|---|---|
| Table salt | ~0.2 oz (5.7 g) | ~1.2 oz (34 g) | fine grain |
| Granulated sugar | ~0.14 oz (4 g) | ~0.85 oz (24 g) | — |
| All-purpose flour | ~0.09 oz (2.6 g) | ~0.55 oz (16 g) | spooned & leveled |
| Baking powder | ~0.14 oz (4 g) | ~0.85 oz (24 g) | — |
| Baking soda | ~0.21 oz (6 g) | ~1.27 oz (36 g) | denser than powder |
| Cocoa powder | ~0.09 oz (2.5 g) | ~0.53 oz (15 g) | unsweetened |
| Dried herbs | ~0.03–0.07 oz | varies widely | depends on herb |
| Ground spices | ~0.07–0.11 oz | varies widely | depends on spice |
Practical rule: For any liquid ingredient — water, oil, vinegar, vanilla extract, lemon juice — use the fl oz × 6 formula from this page. For dry ingredients measured in weight ounces — salt, sugar, flour, spices — look up the specific gram or oz-per-teaspoon value, or weigh the ingredient directly. The two systems should never be swapped without knowing the ingredient's density.
Most real-world uses for an oz to teaspoon conversion fall into one of three categories: scaling small recipe amounts, measuring liquid flavorings without a measuring spoon set, or converting medicine and supplement dosages listed in fl oz to teaspoons for easier measuring. The table below covers the most common kitchen scenarios:
| Ingredient / Use Case | Amount in fl oz | Teaspoons | Context |
|---|---|---|---|
| Vanilla extract (cake) | 0.5 fl oz | 3 tsp | = 1 tablespoon |
| Lemon juice (dressing) | 1 fl oz | 6 tsp | = 2 tablespoons |
| Soy sauce (marinade) | 2 fl oz | 12 tsp | = 4 tablespoons |
| Olive oil (small batch) | 1 fl oz | 6 tsp | = 2 tablespoons |
| Hot sauce (batch) | 4 fl oz | 24 tsp | = ½ cup |
| Apple cider vinegar | 2 fl oz | 12 tsp | = 4 tablespoons |
| Liquid medicine dose | 0.33 fl oz | 2 tsp | common dosage measure |
| Fish sauce (recipe) | 0.5 fl oz | 3 tsp | = 1 tablespoon |
| Worcestershire sauce | 0.5 fl oz | 3 tsp | = 1 tablespoon |
| Simple syrup (cocktail) | 1 fl oz | 6 tsp | = 2 tablespoons |
| Sesame oil (stir-fry) | 0.5 fl oz | 3 tsp | = 1 tablespoon |
| Almond extract | 0.25 fl oz | 1.5 tsp | = ½ tablespoon |
Medicine dosing note: Many over-the-counter liquid medicines in the US label dosages in both fl oz and teaspoons. The standard conversion applies — 1 fl oz = 6 tsp — but medical dosing spoons and syringes are more accurate than household teaspoons, which can vary by up to 20% in volume. When precision matters for medication, always use the measuring device included with the product.
The US teaspoon is defined within the customary volume system governed by the National Institute of Standards and Technology (NIST) — the authority on US weights and measures. For the background on why weight ounces and volume ounces carry the same name yet measure different things, Encyclopædia Britannica's ounce entry covers the full history. Daily fluid intake guidance in teaspoons and ounces is published by the USGS Water Science School.
All the liquid volume converters you need, in one place.
Step up from teaspoons — convert fluid ounces to cups. 8 fl oz = 1 cup = 48 teaspoons.
Convert fluid ounces to milliliters for metric recipes — 1 fl oz = 29.5735 ml.
Scale up from teaspoons to gallons — convert fluid ounces to US gallons for large batches.
Convert fluid ounces to US pints — 16 fl oz = 1 pint = 96 teaspoons.
Convert milliliters to fluid ounces — useful when a metric recipe needs teaspoon measures.
Convert fluid ounces to quarts for larger volumes — 32 fl oz = 1 quart = 192 teaspoons.