How to Convert Teaspoons to US fluid ounces (tsp to fl oz)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert teaspoons into us fluid ounces by hand, with examples and a quick-reference table.
The conversion
To convert teaspoons to us fluid ounces, multiply the value by 0.1666667794. To go the other way, divide by the same number (or multiply by 5.9999959423). For a quick estimate, multiply by about 0.17.
US fluid ounces = teaspoons × 0.1666667794
Worked examples
- 3 tsp = 0.5 fl oz
- 12.5 tsp = 2.0833 fl oz
- 75 tsp = 12.5 fl oz
Teaspoons to US fluid ounces table
| Teaspoons | US fluid ounces |
|---|---|
| 1 tsp | 0.166667 fl oz |
| 2 tsp | 0.333334 fl oz |
| 5 tsp | 0.833334 fl oz |
| 10 tsp | 1.6667 fl oz |
| 20 tsp | 3.3333 fl oz |
| 25 tsp | 4.1667 fl oz |
| 50 tsp | 8.3333 fl oz |
| 100 tsp | 16.6667 fl oz |
| 250 tsp | 41.6667 fl oz |
| 500 tsp | 83.3334 fl oz |
| 1,000 tsp | 166.6668 fl oz |
Common questions
Is tsp to fl oz exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the US fluid ounces to Teaspoons converter.
Mistakes to avoid
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Rounding the factor too early
Using 3 instead of 3.28 for feet per metre introduces an error of almost 9% before you have started.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Teaspoons to US fluid ounces Converter or browse all volume converters.
Run your own numbers: Teaspoons to US fluid ounces Converter