How to Convert Tablespoons to US fluid ounces (tbsp 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 tablespoons into us fluid ounces by hand, with examples and a quick-reference table.
The conversion
To convert tablespoons to us fluid ounces, multiply the value by 0.5000016907. To go the other way, divide by the same number (or multiply by 1.9999932372). For a quick estimate, multiply by about 0.5.
US fluid ounces = tablespoons × 0.5000016907
Worked examples
- 3 tbsp = 1.5 fl oz
- 12.5 tbsp = 6.25 fl oz
- 75 tbsp = 37.5001 fl oz
Tablespoons to US fluid ounces table
| Tablespoons | US fluid ounces |
|---|---|
| 1 tbsp | 0.500002 fl oz |
| 2 tbsp | 1 fl oz |
| 5 tbsp | 2.5 fl oz |
| 10 tbsp | 5 fl oz |
| 20 tbsp | 10 fl oz |
| 25 tbsp | 12.5 fl oz |
| 50 tbsp | 25.0001 fl oz |
| 100 tbsp | 50.0002 fl oz |
| 250 tbsp | 125.0004 fl oz |
| 500 tbsp | 250.0008 fl oz |
| 1,000 tbsp | 500.0017 fl oz |
Common questions
Is tbsp 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 Tablespoons converter.
Mistakes to avoid
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.
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.
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.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
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 Tablespoons to US fluid ounces Converter or browse all volume converters.
Run your own numbers: Tablespoons to US fluid ounces Converter