How to Convert US fluid ounces to Teaspoons (fl oz to tsp)
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 us fluid ounces into teaspoons by hand, with examples and a quick-reference table.
The conversion
To convert us fluid ounces to teaspoons, multiply the value by 5.9999959423. To go the other way, divide by the same number (or multiply by 0.1666667794). For a quick estimate, multiply by about 6.
Teaspoons = us fluid ounces × 5.9999959423
Worked examples
- 3 fl oz = 18 tsp
- 12.5 fl oz = 74.9999 tsp
- 75 fl oz = 449.9997 tsp
US fluid ounces to Teaspoons table
| US fluid ounces | Teaspoons |
|---|---|
| 1 fl oz | 6 tsp |
| 2 fl oz | 12 tsp |
| 5 fl oz | 30 tsp |
| 10 fl oz | 60 tsp |
| 20 fl oz | 119.9999 tsp |
| 25 fl oz | 149.9999 tsp |
| 50 fl oz | 299.9998 tsp |
| 100 fl oz | 599.9996 tsp |
| 250 fl oz | 1,500 tsp |
| 500 fl oz | 3,000 tsp |
| 1,000 fl oz | 6,000 tsp |
Common questions
Is fl oz to tsp 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 Teaspoons to US fluid ounces converter.
Mistakes to avoid
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
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
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.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
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.
For any value, use the US fluid ounces to Teaspoons Converter or browse all volume converters.
Run your own numbers: US fluid ounces to Teaspoons Converter