Fluid Ounces to Teaspoons
An instant fluid ounces-to-teaspoons converter, with the formula and a reference table below.
| Fluid Ounces | Teaspoons |
|---|---|
| 1 fl oz | 6 tsp |
| 2 fl oz | 12 tsp |
| 3 fl oz | 18 tsp |
| 5 fl oz | 30 tsp |
| 10 fl oz | 60 tsp |
| 25 fl oz | 150 tsp |
| 50 fl oz | 300 tsp |
| 100 fl oz | 600 tsp |
How to use
- Enter a value in the Fluid Ounces field.
- The Teaspoons figure appears immediately — no button to press.
- Typing in the Teaspoons field converts back to Fluid Ounces the same way.
- Use the reference table for the values that come up most often.
Fluid Ounces to Teaspoons formula
To convert fluid ounces to teaspoons, multiply by 6.
tsp = fl oz × 6
Put another way, one fluid ounce is exactly 6 teaspoons.
Why this factor: the fluid ounce and the teaspoon are both defined against the liter, so dividing one definition by the other gives 6 directly. Both definitions are set out in full below.
To go the other way, divide by 6 — or use the Teaspoons to Fluid Ounces converter, which is the same calculation reversed.
Worked example
Start with 2 fl oz. Multiply by 6 to get 12 tsp.
2 fl oz × 6 = 12 tsp
The converter above does this for any value you type, in either direction.
What is a fluid ounce?
A US fluid ounce is a small liquid volume, one eighth of a cup.
Definition: Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.
Where it is used: Beverage cans and bottles, cosmetics, and small liquid quantities in the US.
Worth knowing: Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
What is a teaspoon?
A US teaspoon is the smallest common cooking measure, one third of a tablespoon.
Definition: Exactly one sixth of a US fluid ounce, so about 4.9289 milliliters — conventionally rounded to 5 mL.
Where it is used: Recipes, spice and leavening quantities, and liquid medicine doses.
Fluid Ounces vs Teaspoons
The fluid ounce and the teaspoon belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many teaspoons are in a fluid ounce?
One fluid ounce equals 6 teaspoons.
What is the formula to convert fluid ounces to teaspoons?
Multiply the number of fluid ounces by 6. To reverse it, divide by 6 instead.
How do I convert teaspoons back to fluid ounces?
Divide by 6, which is the same as multiplying by 0.166666667.
How many teaspoons are in 10 fluid ounces?
10 fl oz works out to 60 tsp.
Is there anything to watch out for with fluid ounces?
Measures volume, not weight — a fluid ounce of water weighs about 1.04 avoirdupois ounces. The imperial fluid ounce is 28.41 mL.
How is the fluid ounce defined?
Exactly one 128th of a US liquid gallon, so exactly 29.5735295625 milliliters.