Convert Ounces (fl oz) to Teaspoons (tsp)
1 ounce equals 6 Teaspoons.
Ounce to Teaspoon Converter
What Is an Ounce?
The US fluid ounce (fl oz) equals approximately 29.574 mL. One fluid ounce contains exactly 6 US teaspoons.
What Is a Teaspoon?
The US teaspoon (tsp) equals approximately 4.929 mL. It is the smallest standard cooking measure, commonly used for spices and extracts.
Ounce to Teaspoon Formula
The conversion formula is:
teaspoons = fluid ounces × 6
Exact: 1 US fluid ounce = 6 US teaspoons = 2 tablespoons.
Worked Example
Convert 0.5 ounce (half a fluid ounce of vanilla extract):
- Calculate: 0.5 → 3 teaspoon
Common Use Cases
This conversion is needed regularly in:
- Medicine dosing: Liquid medications are often prescribed in ounces or milliliters, but household dosing tools use teaspoons. Knowing that 1 oz = 6 tsp prevents dangerous dosing errors, especially for children's medicine.
- Baking with extracts and flavorings: Vanilla extract, almond extract, and lemon juice are added in teaspoons, but bottles are labeled in fluid ounces. A 2 oz bottle of vanilla extract contains 12 teaspoons — about 12 batches of cookies.
- Spice blending: Dry spice blends and rubs specify measurements in teaspoons, while commercial spice jars are labeled in ounces (by weight). Understanding volume conversions helps when recreating blends from scratch.
- Infant and pet care: Veterinary medicines and infant supplements often specify doses in fractions of a teaspoon. Converting from fluid ounce bottle sizes to teaspoon doses helps determine how many doses each bottle provides.
Frequently Asked Questions
How many teaspoons in half a fluid ounce?
Half a fluid ounce equals exactly 3 teaspoons or 1 tablespoon. This is a standard medicine dose and a common measurement in cocktail recipes (a "bar spoon" is roughly equivalent to 1 teaspoon).
Should I use teaspoons or milliliters for medicine?
Medical professionals recommend milliliters for medication dosing because teaspoons vary in practice. A "kitchen teaspoon" can hold 3–7 mL, but a standard measuring teaspoon is 4.929 mL. For accurate dosing, use a syringe or dosing cup marked in mL. One fluid ounce equals 29.574 mL.
What is the complete US kitchen measurement chain?
From smallest to largest: 1 teaspoon (tsp) → 3 tsp = 1 tablespoon (tbsp) → 2 tbsp = 1 fl oz → 8 fl oz = 1 cup → 2 cups = 1 pint → 2 pints = 1 quart → 4 quarts = 1 gallon. Each step doubles the previous unit (except tsp to tbsp, which triples).
Are "teaspoon" and "5 mL" the same thing?
Very close but not exact. A US teaspoon is 4.929 mL, while metric teaspoons (used in the UK, Australia, and medicine) are defined as exactly 5 mL. The 1.4% difference rarely matters in cooking, but for precise medication dosing, always use the specific unit listed on the label.
Ounces to Teaspoons Conversion Table
Reference table with common ounces to teaspoons conversions. All values calculated with high precision.
Ounces to Teaspoons Table
0.0001 to 12
Ounces to Teaspoons Table
1 to 100000
Teaspoons to Ounces Table
0.001 to 5
Teaspoons to Ounces Table
10 to 1000000
Looking for the reverse? Convert Teaspoon to Ounce
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- Grams to Ounces — Recipes may specify ingredients by weight (g/oz) or volume (tsp)
