The teaspoon
The US teaspoon equals 1/3 of a US tablespoon, or about 4.929 mL. The metric teaspoon (used on most non-US nutrition labels) is exactly 5 mL — close enough that you can substitute freely in cooking but not in precise dosing.
Teaspoons to US fluid ounces Converter
1 tsp = 0.166667 fl oz
1 teaspoon equals 0.166667 US fluid ounces. To convert teaspoons to US fluid ounces, multiply the teaspoon value by 0.166667. For quick reference: 1 tsp = 0.166667 fl oz, 5 tsp = 0.833333 fl oz, 10 tsp = 1.66667 fl oz, 100 tsp = 16.6667 fl oz.
Formula
US fluid ounces = Teaspoons × 0.166667Quick
How to convert teaspoons to US fluid ounces
Take your value
Start with your value in teaspoons.
Multiply by 0.166667
Multiply the teaspoon value by 0.166667. This is the exact conversion factor from teaspoons to US fluid ounces.
Read the result
The product is your value in US fluid ounces. For example, 5 tsp × 0.166667 = 0.833333 fl oz.
Conversion formula
The exact factor from teaspoons to US fluid ounces is 0.166667.
US fluid ounces = Teaspoons × 0.166667
Teaspoons to US fluid ounces conversion table
Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.
| Teaspoons (tsp) | US fluid ounces (fl oz) |
|---|---|
| 0.1 tsp | 0.016667 fl oz |
| 0.25 tsp | 0.041667 fl oz |
| 0.5 tsp | 0.083333 fl oz |
| 1 tsp | 0.16667 fl oz |
| 1.5 tsp | 0.25 fl oz |
| 2 tsp | 0.33333 fl oz |
| 2.5 tsp | 0.41667 fl oz |
| 3 tsp | 0.5 fl oz |
| 4 tsp | 0.66667 fl oz |
| 5 tsp | 0.83333 fl oz |
| 6 tsp | 1 fl oz |
| 7 tsp | 1.1667 fl oz |
| 8 tsp | 1.3333 fl oz |
| 9 tsp | 1.5 fl oz |
| 10 tsp | 1.6667 fl oz |
| 12 tsp | 2 fl oz |
| 15 tsp | 2.5 fl oz |
| 20 tsp | 3.3333 fl oz |
| 25 tsp | 4.1667 fl oz |
| 30 tsp | 5 fl oz |
| 40 tsp | 6.6667 fl oz |
| 50 tsp | 8.3333 fl oz |
| 60 tsp | 10 fl oz |
| 75 tsp | 12.5 fl oz |
| 100 tsp | 16.667 fl oz |
| 125 tsp | 20.833 fl oz |
| 150 tsp | 25 fl oz |
| 200 tsp | 33.333 fl oz |
| 250 tsp | 41.667 fl oz |
| 300 tsp | 50 fl oz |
| 400 tsp | 66.667 fl oz |
| 500 tsp | 83.333 fl oz |
| 600 tsp | 100 fl oz |
| 750 tsp | 125 fl oz |
| 1000 tsp | 166.67 fl oz |
| 1500 tsp | 250 fl oz |
| 2000 tsp | 333.33 fl oz |
| 2500 tsp | 416.67 fl oz |
| 3000 tsp | 500 fl oz |
| 4000 tsp | 666.67 fl oz |
| 5000 tsp | 833.33 fl oz |
| 7500 tsp | 1250 fl oz |
| 10000 tsp | 1666.7 fl oz |
| 15000 tsp | 2500 fl oz |
| 20000 tsp | 3333.3 fl oz |
| 25000 tsp | 4166.7 fl oz |
| 30000 tsp | 5000 fl oz |
| 40000 tsp | 6666.7 fl oz |
| 50000 tsp | 8333.3 fl oz |
| 100000 tsp | 16667 fl oz |
Real-world reference
A standard pinch of salt is about 1/8 tsp. Most spice measurements in recipes are in teaspoons. In US fluid ounces, that gives you: 1 tsp = 0.166667 fl oz, 10 tsp = 1.66667 fl oz, 100 tsp = 16.6667 fl oz.
Frequently asked questions
- How many US fluid ounces are in 1 teaspoon?
- 1 teaspoon equals 0.166667 US fluid ounces.
- How do I convert teaspoons to US fluid ounces?
- Multiply the teaspoon value by 0.166667. So x tsp × 0.166667 = the equivalent in fl oz.
- What is 5 teaspoons in US fluid ounces?
- 5 teaspoons equals 0.833333 US fluid ounces.
- What is 10 teaspoons in US fluid ounces?
- 10 teaspoons equals 1.66667 US fluid ounces.
- What is 100 teaspoons in US fluid ounces?
- 100 teaspoons equals 16.6667 US fluid ounces.
- How do I convert back from US fluid ounces to teaspoons?
- Multiply the US fluid ounce value by 6. For example, 1 fl oz = 6 tsp.
- Is the teaspoon bigger than the US fluid ounce?
- No. 1 teaspoon is smaller than 1 US fluid ounce. It takes 6 teaspoons to equal 1 US fluid ounce.
- Are these conversion factors exact?
- Yes. The factor of 0.166667 is derived directly from the SI definitions of teaspoon and US fluid ounce.
About the teaspoon and the US fluid ounce
The US fluid ounce
The US fluid ounce (fl oz) is a customary unit of volume equal to 1/128 of a US gallon, or about 29.5735 mL. It is the standard unit for liquid serving sizes on US nutrition labels. The US fluid ounce is slightly larger than the UK fluid ounce (28.4131 mL) — confusingly, the opposite direction from the gallons.