Teaspoons to Fluid Ounces (tsp to fl oz)
A US fluid ounce is exactly 6 US teaspoons, so this conversion is one division: fluid ounces = teaspoons ÷ 6. Both units are definitions rather than measurements, because a US gallon is exactly 231 cubic inches and an inch is exactly 2.54 cm, which puts the teaspoon at exactly 4.92892159375 mL and the fluid ounce at exactly 29.5735295625 mL. That makes 1 tsp 0.1667 fl oz, 3 tsp exactly 0.5 fl oz, 6 tsp exactly 1 fl oz and 12 tsp exactly 2 fl oz. This page opens the converter on the Volume category with Teaspoon (US) in the From box and Fluid ounce (US) in the To box, whatever pair you converted last, and it answers while you type to twelve significant digits, so one teaspoon reads 0.166666666667 rather than a rounded 0.17. Under the answer the same spoonful is listed in the volume units the converter treats as common: millilitres, litres, cubic metres, tablespoons, fluid ounces, cups, pints, quarts and gallons, with those last six in their US sizes. The unit menus use British spellings, so Millilitre (mL) and Litre (L) are the milliliter and liter. The teaspoon here is the US customary one and it is the only teaspoon in the menu, while the imperial fluid ounce is in both menus at all times as Fluid ounce (imperial) and joins the list under the answer when the switch marked Show 5 more is ticked. The questions below give the arithmetic for the imperial and metric spoons.
1 tsp in every volume unit
Teaspoons in fluid ounces, tablespoons and millilitres
Every figure is this converter's own output for that many US teaspoons, rounded for reading: fluid ounces to four decimal places, tablespoons and millilitres to two. The fluid ounce and tablespoon figures at 0.75, 1.5, 3, 6, 12, 24, 48 and 96 teaspoons are exact, because those amounts divide evenly by six and by three. The millilitre column is always rounded, since one teaspoon is 4.92892159375 mL.
| Teaspoons (US) | Fluid ounces (US) | Tablespoons (US) | Millilitres |
|---|---|---|---|
| 0.25 tsp | 0.0417 | 0.08 | 1.23 |
| 0.5 tsp | 0.0833 | 0.17 | 2.46 |
| 0.75 tsp | 0.1250 | 0.25 | 3.70 |
| 1 tsp | 0.1667 | 0.33 | 4.93 |
| 1.5 tsp | 0.2500 | 0.50 | 7.39 |
| 2 tsp | 0.3333 | 0.67 | 9.86 |
| 3 tsp | 0.5000 | 1.00 | 14.79 |
| 4 tsp | 0.6667 | 1.33 | 19.72 |
| 6 tsp | 1.0000 | 2.00 | 29.57 |
| 8 tsp | 1.3333 | 2.67 | 39.43 |
| 12 tsp | 2.0000 | 4.00 | 59.15 |
| 16 tsp | 2.6667 | 5.33 | 78.86 |
| 24 tsp | 4.0000 | 8.00 | 118.29 |
| 32 tsp | 5.3333 | 10.67 | 157.73 |
| 48 tsp | 8.0000 | 16.00 | 236.59 |
| 96 tsp | 16.0000 | 32.00 | 473.18 |
Common questions
- How many fluid ounces is 1 teaspoon?
- 0.1667 fl oz, a sixth of one, and the converter prints 0.166666666667 because that division never ends. The amounts asked for next most often: half a teaspoon is 0.0833333333333 fl oz, 2 tsp is 0.333333333333 fl oz, 3 tsp is exactly 0.5 fl oz, 4 tsp is 0.666666666667 fl oz, 6 tsp is exactly 1 fl oz, 8 tsp is 1.33333333333 fl oz and 12 tsp is exactly 2 fl oz. Type any of them into the From box and the headline changes without pressing anything.
- How many teaspoons are in a fluid ounce?
- Six exactly, in US measure. Half a fluid ounce is 3 tsp, 2 fl oz is 12 tsp, 4 fl oz is 24 tsp and 8 fl oz, which is one US cup, is 48 tsp. The Swap units button between the two boxes turns this page into a fluid ounces to teaspoons converter without reloading it, and the list under the answer then reads the other way too, with the teaspoon row among the units it prints.
- Is this the US teaspoon or the imperial one?
- The US customary teaspoon, which the unit menu names Teaspoon (US) and which is exactly 4.92892159375 mL, a sixth of a US fluid ounce. It is the only teaspoon in this converter. The measuring spoon sold in the UK, Australia, New Zealand and Canada is the metric teaspoon of exactly 5 mL, about 1.4 percent larger, and the historic imperial teaspoon was smaller again at an eighth of an imperial fluid ounce, 3.5516328125 mL. Neither is a separate unit here, so convert one by typing its millilitres instead: 5 mL is 0.169070113509 US fl oz and 3.5516328125 mL is 0.12009499255 US fl oz.
- Does an imperial fluid ounce change the answer?
- Yes, and by more than the spoon does. A US fluid ounce is 29.5735295625 mL against 28.4130625 mL for the imperial one, so the imperial ounce is about 4 percent smaller. Measured against it, 1 US teaspoon is 0.173473788464 imperial fl oz and 1 imperial fluid ounce is 5.76455964242 US teaspoons rather than a clean 6. Both unit menus carry Fluid ounce (imperial) at all times, so you can select it in the To box; the converter counts it as uncommon, so it only appears in the list under the answer once the switch marked Show 5 more is ticked.
- What is the formula, and is dividing by 6 exact?
- fl oz = tsp ÷ 6 going this way, and tsp = fl oz × 6 going back. The 6 is exact by definition rather than a rounded ratio: a US gallon is exactly 231 cubic inches, a fluid ounce is a 128th of that gallon, and a teaspoon is a sixth of the fluid ounce, so a 768th of the gallon. The only rounding on this page is in the printing, where 0.166666666667 is a sixth cut to twelve significant digits, not an approximation of the factor.
- Can I type half or three quarters of a teaspoon as a fraction?
- Not as a fraction. The From box takes digits, one decimal point and an optional minus sign, so a typed 1/2 raises a message saying it is not a number instead of guessing at what you meant. Use the decimal: 0.25 tsp is 0.0416666666667 fl oz, 0.5 tsp is 0.0833333333333 fl oz, 0.75 tsp is exactly 0.125 fl oz and 1.5 tsp is exactly 0.25 fl oz. Thousands separators are the one extra character it accepts, so 1,000 is read as a thousand. For an awkward fraction, the fraction calculator turns it into a decimal first.
- Is a tablespoon three teaspoons here?
- Yes. The menu's Tablespoon (US) is exactly 3 US teaspoons and half a US fluid ounce, so 1 tsp is 0.333333333333 tbsp and 3 tsp is 1 tbsp exactly, and that row sits in the list under every answer. The Australian tablespoon is the one that catches people out: it is 20 mL, four metric teaspoons rather than three, and it is not a unit in this menu, so convert it as 20 mL, which is 0.676280454037 US fl oz.
- Is a fluid ounce the same as an ounce on a scale?
- No, and the converter keeps them apart: the fluid ounce lives in Volume and the ounce of weight in Mass, so it will not turn one into the other. A fluid ounce is 29.5735295625 mL of space, while an ounce of weight is 28.349523125 g. They only line up for something as dense as water, where a fluid ounce weighs close to 29.6 g, about 4 percent more than an ounce of weight. Turning spoonfuls of flour or sugar into grams is a density question instead, and the grams to cups tool answers that one with the density it used shown beside the result.
- Why does the page open on teaspoons and fluid ounces, and does anything leave my browser?
- The pair belongs to this page, so it opens on Teaspoon (US) into Fluid ounce (US) even when you last used the main converter for something else, and it leaves that remembered pair alone: only the amount you type and the uncommon-units switch carry between the two. The Start over button at the top of the page clears what is kept. Nothing is uploaded either way, since the conversion is one division against a table of factors that ships with the page, so it needs no account and keeps working with the network off.
Conversion factors are the exact legal definitions where one exists. An inch is exactly 2.54 cm and a pound exactly 0.45359237 kg, so those conversions are exact rather than approximate. Temperature uses offsets rather than factors, and that is shown in the working.