Convert US teaspoons to fluid ounces instantly. Free calculator, full reference chart, fractional values, and dry ingredient weight guide — no sign-up needed.
Quick Answer: 6 US teaspoons = 1 US fluid ounce. To convert teaspoons to oz, divide by 6. Common values: 3 tsp = 0.5 fl oz · 6 tsp = 1 fl oz · 12 tsp = 2 fl oz · 24 tsp = 4 fl oz · 48 tsp = 8 fl oz · 96 tsp = 16 fl oz.
Formula: fl oz = teaspoons ÷ 6 (US customary)
Fluid Ounces = Teaspoons ÷ 6
Teaspoons = Fluid Ounces × 6
The divisor of 6 comes directly from the US customary chain: 1 fluid ounce equals 2 tablespoons, and each tablespoon holds 3 teaspoons — so 2 × 3 = 6 teaspoons per fluid ounce. This means 1 teaspoon is exactly one-sixth of a fluid ounce, or approximately 0.1667 fl oz. The formula works in both directions: divide teaspoons by 6 to get fl oz, or multiply fl oz by 6 to reverse the conversion.
This chart covers the full practical range for a teaspoon to oz conversion — from single teaspoons used for spices and extracts all the way to large quantities used in food production and batch cooking. The tablespoon column is included because recipes often list measurements in either unit, and knowing both saves a calculation step.
| Teaspoons (tsp) | Fluid Ounces (fl oz) | Tablespoons (tbsp) | Common Reference |
|---|---|---|---|
| 1 tsp | 0.1667 fl oz | ⅓ tbsp | standard teaspoon |
| 2 tsp | 0.333 fl oz | ⅔ tbsp | — |
| 3 tsp | 0.5 fl oz | 1 tbsp | 1 tablespoon |
| 4 tsp | 0.667 fl oz | 1⅓ tbsp | — |
| 5 tsp | 0.833 fl oz | 1⅔ tbsp | — |
| 6 tsp | 1 fl oz | 2 tbsp | 1 fluid ounce |
| 7 tsp | 1.167 fl oz | 2⅓ tbsp | — |
| 8 tsp | 1.333 fl oz | 2⅔ tbsp | — |
| 9 tsp | 1.5 fl oz | 3 tbsp | standard shot glass |
| 10 tsp | 1.667 fl oz | 3⅓ tbsp | — |
| 12 tsp | 2 fl oz | 4 tbsp | ¼ cup |
| 14 tsp | 2.333 fl oz | 4⅔ tbsp | — |
| 15 tsp | 2.5 fl oz | 5 tbsp | — |
| 16 tsp | 2.667 fl oz | 5⅓ tbsp | — |
| 18 tsp | 3 fl oz | 6 tbsp | — |
| 20 tsp | 3.333 fl oz | 6⅔ tbsp | — |
| 24 tsp | 4 fl oz | 8 tbsp | ½ cup |
| 25 tsp | 4.167 fl oz | 8⅓ tbsp | — |
| 30 tsp | 5 fl oz | 10 tbsp | — |
| 32 tsp | 5.333 fl oz | 10⅔ tbsp | — |
| 40 tsp | 6.667 fl oz | 13⅓ tbsp | — |
| 42 tsp | 7 fl oz | 14 tbsp | — |
| 48 tsp | 8 fl oz | 16 tbsp | 1 cup |
| 64 tsp | 10.667 fl oz | 21⅓ tbsp | — |
| 72 tsp | 12 fl oz | 24 tbsp | 1½ cups / soda can |
| 96 tsp | 16 fl oz | 32 tbsp | 1 pint |
| 192 tsp | 32 fl oz | 64 tbsp | 1 quart |
| 768 tsp | 128 fl oz | 256 tbsp | 1 gallon |
Baking and flavoring recipes frequently call for ¼, ½, or ¾ teaspoon amounts. Because 1 teaspoon is already one-sixth of a fluid ounce, fractional teaspoons produce very small fl oz values — often relevant when scaling spice blends or measuring medicine doses. The "nearest practical measure" column shows the closest tablespoon or teaspoon fraction you can use without a scale.
| Teaspoons | Exact fl oz | Nearest Practical Measure | Notes |
|---|---|---|---|
| ⅛ tsp | 0.0208 fl oz | pinch / dash | smallest common measure |
| ¼ tsp | 0.0417 fl oz | ¼ tsp | standard spice amount |
| ⅓ tsp | 0.0556 fl oz | ⅓ tsp | — |
| ½ tsp | 0.0833 fl oz | ½ tsp | common baking measure |
| ¾ tsp | 0.125 fl oz | ¾ tsp | = ⅛ fl oz exactly |
| 1 tsp | 0.1667 fl oz | 1 tsp | base unit |
| 1¼ tsp | 0.2083 fl oz | 1¼ tsp | — |
| 1½ tsp | 0.25 fl oz | 1½ tsp | = ¼ fl oz exactly |
| 2¼ tsp | 0.375 fl oz | 2¼ tsp | standard yeast packet |
| 2½ tsp | 0.4167 fl oz | 2½ tsp | — |
| 3 tsp | 0.5 fl oz | 1 tbsp | = ½ fl oz exactly |
| 3½ tsp | 0.5833 fl oz | 1 tbsp + ½ tsp | — |
| 4½ tsp | 0.75 fl oz | 1½ tbsp | = ¾ fl oz exactly |
Memory shortcut: Three teaspoons always equal ½ fl oz — the same as one tablespoon. So for any teaspoon-to-oz calculation, count how many groups of 3 teaspoons you have, then multiply those groups by 0.5. For example, 9 teaspoons = 3 groups × 0.5 = 1.5 fl oz. This works faster than dividing by 6 for even numbers of teaspoons.
A teaspoon to oz conversion based on fluid ounces gives you a volume measurement. When a recipe lists a dry ingredient in ounces — such as "0.2 oz of salt" — it means weight ounces, not fluid ounces. These are completely different units despite sharing the "oz" abbreviation. The weight of one teaspoon varies significantly by ingredient because different substances have different densities.
Here are the weight-based values for the most common baking and cooking ingredients measured by the teaspoon:
| Ingredient | Weight per 1 tsp | Weight per 1 tbsp (3 tsp) | Type |
|---|---|---|---|
| Table salt | ~0.20 oz (5.7 g) | ~0.60 oz (17 g) | dry weight |
| Granulated sugar | ~0.14 oz (4.0 g) | ~0.42 oz (12 g) | dry weight |
| All-purpose flour | ~0.09 oz (2.6 g) | ~0.27 oz (7.8 g) | dry weight |
| Baking powder | ~0.14 oz (4.0 g) | ~0.42 oz (12 g) | dry weight |
| Baking soda | ~0.21 oz (6.0 g) | ~0.64 oz (18 g) | dry weight |
| Ground black pepper | ~0.07 oz (2.1 g) | ~0.22 oz (6.3 g) | dry weight |
| Vanilla extract | ~0.15 oz (4.2 g) | ~0.44 oz (12.6 g) | liquid weight |
| Olive oil | ~0.15 oz (4.5 g) | ~0.46 oz (13.5 g) | liquid weight |
| Instant dry yeast | ~0.11 oz (3.1 g) | ~0.32 oz (9.3 g) | dry weight |
| Almond butter | ~0.19 oz (5.4 g) | ~0.57 oz (16.2 g) | paste weight |
| Cocoa powder | ~0.09 oz (2.5 g) | ~0.27 oz (7.5 g) | dry weight |
Yeast note: A standard packet of active dry yeast or instant yeast contains 2¼ teaspoons (7 g). In fluid ounce terms that is only 0.375 fl oz — but what actually matters for baking is the gram weight (7 g), not the volume. When a bread recipe says "1 packet of yeast," using 2¼ tsp is correct regardless of the fl oz equivalent.
Positioning the teaspoon within the full US volume system makes multi-step conversions — like going from teaspoons to cups or pints — a single lookup rather than a chain of calculations.
| Unit | Teaspoons | Tablespoons | Fluid Ounces | Cups | Pints |
|---|---|---|---|---|---|
| 1 teaspoon | 1 | ⅓ | 0.167 | 0.0208 | 0.0104 |
| 1 tablespoon | 3 | 1 | 0.5 | 0.0625 | 0.03125 |
| 1 fluid ounce | 6 | 2 | 1 | 0.125 | 0.0625 |
| 1 cup | 48 | 16 | 8 | 1 | 0.5 |
| 1 pint | 96 | 32 | 16 | 2 | 1 |
| 1 quart | 192 | 64 | 32 | 4 | 2 |
| 1 gallon | 768 | 256 | 128 | 16 | 8 |
When a recipe uses cups and you only have a teaspoon measure, multiply the cup count by 48 to get the equivalent teaspoon count. For the reverse — going from teaspoons up to fluid ounces — the oz to teaspoon converter handles that directly. For cup-based measurements, the oz to cups converter is the quickest route.
Most teaspoon-to-oz conversions in everyday cooking fall into three categories: scaling liquid flavorings, converting spice-blend quantities for food labelling, and translating medicine or supplement dosages. The table below covers the most frequently searched real-world scenarios:
| Ingredient / Use Case | Teaspoons | Fluid Ounces | Context |
|---|---|---|---|
| Vanilla extract (cookie recipe) | 1 tsp | 0.167 fl oz | most common extract dose |
| Baking powder (cake) | 1 tsp | 0.167 fl oz | volume; weight ≈ 0.14 oz |
| Baking soda (bread) | 1 tsp | 0.167 fl oz | volume; weight ≈ 0.21 oz |
| Olive oil (dressing) | 3 tsp | 0.5 fl oz | = 1 tablespoon |
| Soy sauce (stir-fry) | 6 tsp | 1 fl oz | = 2 tablespoons |
| Honey (tea) | 1 tsp | 0.167 fl oz | volume; weight ≈ 0.25 oz |
| Lemon juice (salad) | 3 tsp | 0.5 fl oz | = 1 tablespoon |
| Instant yeast (bread) | 2¼ tsp | 0.375 fl oz | 1 standard packet (7 g) |
| Salt (pasta water) | 6 tsp | 1 fl oz | volume; weight ≈ 1.2 oz |
| Liquid medicine dose | 1 tsp | 0.167 fl oz | 5 ml standard dose |
| Fish sauce (recipe) | 3 tsp | 0.5 fl oz | = 1 tablespoon |
| Almond butter (smoothie) | 4 tsp | 0.667 fl oz | weight ≈ 0.76 oz |
Medicine dosing: US liquid medicines frequently express doses as teaspoons rather than fluid ounces. The standard equivalence is 1 teaspoon = 5 ml ≈ 0.167 fl oz. However, household teaspoons vary by up to 20% in actual volume — always use the calibrated measuring device included with any medication rather than a kitchen teaspoon.
❌ Confusing volume oz with weight oz for dry ingredients
The formula tsp ÷ 6 gives fluid ounces — a volume. If a recipe specifies "0.2 oz of salt," it means weight ounces, not fluid ounces. One teaspoon of salt weighs about 0.2 oz (5.7 g) but occupies only 0.167 fl oz of volume. Using the wrong oz type produces a different amount entirely.
❌ Dividing by 8 instead of 6
Dividing by 8 would convert teaspoons to cups, not fluid ounces — because 1 cup = 48 teaspoons, not 6. The correct divisor for fluid ounces is always 6. A quick check: 6 teaspoons ÷ 6 = 1 fl oz. If your result equals 1 after entering 6, the formula is correct.
❌ Using a kitchen teaspoon to dose medicine
Kitchen teaspoons hold anywhere from 4 to 6 ml — against the standard 5 ml. That 20% variance matters for medication. Always use a calibrated oral syringe, a dosing cup, or the measuring spoon provided with the medicine for accurate delivery.
❌ Treating 1 tablespoon as 6 teaspoons
One tablespoon holds exactly 3 teaspoons — not 6. Confusing tablespoons with fluid ounces is surprisingly common. Remember: 1 fl oz = 6 tsp = 2 tbsp. The tablespoon is the midpoint between a teaspoon and a fluid ounce.
The teaspoon's position in the US customary volume system is governed by standards set by the National Institute of Standards and Technology (NIST). For a thorough look at why "ounce" refers to both volume and weight depending on context, Encyclopædia Britannica's ounce article traces the full etymological and metrological history. Practical water intake figures in teaspoons and ounces are published by the USGS Water Science School.
All the liquid volume converters you need, in one place.
Reverse converter — go from fluid ounces back to teaspoons. 1 fl oz = 6 tsp.
Step up from teaspoons — convert fluid ounces to cups. 8 fl oz = 1 cup = 48 teaspoons.
Convert fluid ounces to milliliters — 1 tsp = 4.929 ml in the US customary system.
Convert fluid ounces to pints — 1 pint = 96 teaspoons.
Scale up from teaspoons — 1 gallon contains 768 teaspoons or 128 fluid ounces.
Convert milliliters to fluid ounces — useful when a metric recipe calls for teaspoon measures.