Teaspoons to Fluid Ounces (tsp to fl oz)

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?

Teaspoon (US) here is exactly 4.92892159375 mL, one sixth of a US fluid ounce, and is the only teaspoon entry. If your source explicitly supplies a 5 mL teaspoon, it is about 1.4% larger. A separately supplied convention of one eighth imperial fluid ounce gives exactly 3.5516328125 mL. Neither is a teaspoon menu entry: select Milliliter for the supplied volume. Five mL displays as 0.169070113509 US fl oz; 3.5516328125 mL as 0.12009499255 US fl oz. Country, spoon and recipe names alone do not establish a convention.

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?

The scalar field refuses slash fractions such as 1/2. Enter a finite decimal, optionally signed, with correctly grouped thousands, scientific notation or a suffix matching From. In US units, 0.25 tsp displays as 0.0416666666667 fl oz, 0.5 as 0.0833333333333 fl oz, 0.75 is exactly 0.125 fl oz and 1.5 exactly 0.25 fl oz. Fraction Calculator supports separate exact rational arithmetic; re-entering a rounded decimal here uses that finite decimal.

Is a tablespoon three teaspoons here?

Yes: Tablespoon (US) is exactly 3 US teaspoons and half a US fluid ounce. One tsp displays as 0.333333333333 tbsp; three tsp is exactly one tbsp. For a separately supplied 20 mL tablespoon convention, four supplied 5 mL teaspoons make that volume, which displays as 0.676280454037 US fl oz with Milliliter selected. That convention is not a menu entry and is not inferred from a recipe’s origin.

Is a fluid ounce the same as an ounce on a scale?

A US fluid ounce is exactly 29.5735295625 mL of volume; an avoirdupois ounce is exactly 28.349523125 g of mass. Unit Converter keeps volume and mass separate. A supplied volume does not establish the mass of an ingredient or an actual filled scoop. Mass = volume × an applicable supplied density in matching units, with the material and conditions specified. Grams to Cups uses named ingredient density conventions rather than arbitrary user-entered density; its US cup is rounded to 236.588 mL, while Unit Converter uses exactly 236.5882365 mL.

Why does the page open on teaspoons and fluid ounces, and does anything leave my browser?

This focused page opens on Teaspoon (US) to Fluid ounce (US), while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units.