Convert volume units — liters, gallons, cups, milliliters, cubic meters, barrels and more.
| Unit | Name | Value |
|---|---|---|
| 0.001 tsp | 0.000166667 fl oz | |
| 0.01 tsp | 0.00166667 fl oz | |
| 0.1 tsp | 0.0166667 fl oz | |
| 1 tsp | 0.166667 fl oz | |
| 5 tsp | 0.833334 fl oz | |
| 10 tsp | 1.66667 fl oz | |
| 50 tsp | 8.33334 fl oz | |
| 100 tsp | 16.6667 fl oz | |
| 1000 tsp | 166.667 fl oz |
Common teaspoon values converted to fluid ounce — factor: 1 tsp = 0.1667 fl oz
| Teaspoon (tsp) | Fluid Ounce (fl oz) | Context |
|---|---|---|
| 0.25 tsp | 0.04167 fl oz | Pinch |
| 0.5 tsp | 0.08333 fl oz | Half teaspoon |
| 1 tsp | 0.1667 fl oz | Teaspoon |
| 2 tsp | 0.3333 fl oz | Two teaspoons |
| 3 tsp | 0.5 fl oz | Tablespoon |
| 6 tsp | 1 fl oz | 2 tablespoons |
| 12 tsp | 2 fl oz | Quarter cup |
| 24 tsp | 4 fl oz | Half cup |
| 48 tsp | 8 fl oz | One cup |
| 96 tsp | 16 fl oz | One pint |
| 192 tsp | 32 fl oz | One quart |
| 384 tsp | 64 fl oz | Half gallon |
| 768 tsp | 128 fl oz | One gallon |
| 1,536 tsp | 256 fl oz | 2 gallons |
| 3,840 tsp | 640 fl oz | 5 gallons |
Converting teaspoon to fluid ounce comes up frequently in cooking, chemistry, medicine, and engineering. A recipe written in metric units may need to be adapted for a kitchen using fluid ounce, or a laboratory protocol may specify volumes in teaspoon that need to be measured with equipment calibrated in fluid ounce.
In everyday use, knowing that 5 tsp = 0.8333 fl oz and 10 tsp = 1.667 fl oz covers most common situations. For bulk calculations, 100 tsp = 16.67 fl oz is a useful anchor. The reverse conversion — fluid ounce back to teaspoon — uses the factor 6, so 1 fl oz = 6 tsp.
All conversions use the internationally recognized factor of exactly 1 tsp = 0.1667 fl oz. Calculations are performed in IEEE 754 double-precision floating point, giving accuracy to at least 8 significant figures — more than sufficient for any practical application.
Formula: Fluid Ounce = Teaspoon × 0.16666678
Multiply any teaspoon value by 0.16666678 to get fluid ounce. One teaspoon equals 0.16666678 fl oz.
Reverse: Teaspoon = Fluid Ounce × 5.9999959
Teaspoons ÷ 6 = fluid ounces. Exact.
3 tsp = 1 tbsp = ½ fl oz. 6 tsp = 1 fl oz.
fl oz × 6 = tsp.
Measures baking powder, baking soda, salt, and spices in teaspoons, the backbone of baking.
Administers children's liquid medicine in teaspoon doses as per OTC label instructions.
Tests flavor compound thresholds using teaspoon additions in sensory evaluation panels.
Adds clarifying agents and pH adjusters in teaspoon quantities to fermentation batches.
Formulates serums and toners using teaspoon measurements for small test batches.
Doses water conditioners and fertilizers in teaspoons for planted tanks and reef systems.
The US teaspoon is exactly one-third of a tablespoon, 4.92892 mL. It was standardized in the US in the early 20th century partly to address inconsistent home medication dosing.
Teaspoons are the smallest standard cooking measure in the US system, used for spices, leaveners, and flavorings. A medical teaspoon dose conventionally means 5 mL.
Interesting fact: The teaspoon is behind one of science's most cited comparisons: the entire Pacific Ocean would fill roughly 7.1 × 10²³ teaspoons.
The US fluid ounce is defined as 1/128 of a US gallon, exactly 29.5735 mL. The US and UK fl oz differ: the US is 29.57 mL while the Imperial fl oz is 28.41 mL.
Fluid ounces appear on every US beverage container: a soda can is 12 fl oz, a water bottle is 16.9 fl oz, and a US shot glass is 1.5 fl oz.
Interesting fact: Despite sharing the name 'ounce', the fluid ounce measures volume, not weight. One fl oz of water weighs about 1.04 oz, but one fl oz of honey weighs about 1.5 oz.