A US fluid ounce is 1/128 of a US gallon.
Fluid ounces to Hectoliters Converter — fl oz to hL
Convert Fluid ounce (fl oz) to Hectoliter (hL) using the exact conversion factor (1 fluid ounce = 0.0002957353 hectoliter). See the formula, worked examples, conversion table, history, and common uses.
Fluid ounces to Hectoliters converter
Converter
Volume Converter
Convert metric, US customary, imperial, cooking, dry, and industrial volume units.
Context values
Some unit families need one extra value for a physically accurate result.
Hectoliter is 100 liter units.
Result = input x 2.95735296e-5 / 0.1.
Volume uses the cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Fluid ounces to Hectoliters
Fluid ounce and Hectoliter appear side by side at fuel pumps and on beverage labels, since the US measures liquids in gallons while most of the world uses liters. Fluid ounce is most often used for us beverage container sizing (soda, water bottles).
Formula
hectoliters = fluid ounces × 0.000295735295625
This factor comes from each unit's defined relationship to the category's base unit: 1 fluid ounce equals 0.0000295735295625 base units, and 1 hectoliter equals 0.1 base units, so dividing one by the other gives the direct fluid ounce-to-hectoliter factor of 0.000295735295625.
Simple example
1 fl oz × 0.0002957352956 = 0.0002957353 hL
1 fluid ounce = 0.0002957353 hectoliters.
Real-world example
10 fl oz × 0.0002957352956 = 0.002957353 hL
10 fluid ounces = 0.002957353 hectoliters.
Conversion table
| Fluid ounce (fl oz) | Hectoliter (hL) |
|---|---|
| 1 fl oz | 0.0002957353 hL |
| 5 fl oz | 0.0014786765 hL |
| 10 fl oz | 0.002957353 hL |
| 25 fl oz | 0.0073933824 hL |
| 50 fl oz | 0.0147867648 hL |
| 100 fl oz | 0.0295735296 hL |
Reverse conversion: Hectoliter to Fluid ounce
0.0002957353 hL × 3381.40227 = 1.000000015 fl oz
0.0002957353 hectoliters = 1.000000015 fluid ounces.
fluid ounces = hectoliters × 3381.40227018
For a page dedicated to this direction, see Hectoliter to Fluid ounce.
Understanding the Fluid ounce
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
Where it's used: United States (beverage, nutrition labeling)
Uses of the Fluid ounce today
- US beverage container sizing (soda, water bottles)
- US nutrition and medication dosing labels
History of the Fluid ounce
The US fluid ounce follows from the same English wine-gallon system as the rest of the US liquid volume units, defined as a consistent fraction of the gallon.
Historical origin. Fluid ounce was not the invention of a single named person; it developed through the process described above.
Understanding the Hectoliter (hL)
Hectoliter is 100 liter units.
Fluid ounce — sources
- NIST Handbook 44, Appendix C — General tables of units including the US fluid ounce definition.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many hectoliters are in 1 fluid ounce?
1 fluid ounce equals 0.0002957353 hectoliters, using the exact defined conversion factor rather than an estimate.
How do I convert fluid ounce to hectoliter?
Multiply the fluid ounce value by 0.0002957352956. The converter above does this instantly to whatever precision you set.
How do I convert hectoliter back to fluid ounce?
Use the reverse factor: 1 hectoliter equals 3,381.40227 fluid ounces. You can also use the swap control in the converter above to flip the direction instantly.
What is a fluid ounce?
Fluid ounce (fl oz) measures volume. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. It is classified as a US customary unit.
What is a hectoliter?
Hectoliter (hL) is a unit of volume.
Is the fluid ounce to hectoliter conversion exact?
Yes. The US fluid ounce is 1/128 of a US gallon: exactly 29.5735295625 milliliters. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
Where is the fluid ounce still used today?
United States (beverage, nutrition labeling)