mL to Fluid Ounces Converter (mL to oz)
Convert mL to fluid ounces (oz) or fluid ounces to mL. 100 mL = 3.3814 US fl oz. Choose US customary or Imperial fluid-ounce standards.
How it works
Use 29.5735295625 mL per US fluid ounce or 28.4130625 mL per imperial fluid ounce, depending on the selected standard.
Formula / calculation method
US fl oz = mL ÷ 29.5735295625mL = US fl oz × 29.5735295625Imperial fl oz = mL ÷ 28.4130625mL = Imperial fl oz × 28.4130625
Worked examples
- 100 mL is approximately 3.3814 US fl oz.
- 100 mL is approximately 3.5195 imperial fl oz.
- 250 mL is approximately 8.4535 US fl oz.
- 1 US fl oz equals exactly 29.5735295625 mL by the conversion factor used here.
When this tool helps
Useful for recipes, beverages, toiletries, medication labels, bottles, travel containers, and international packaging where “fl oz” may mean different units.
Related calculations: liters to gallons, tablespoons to cups, and milliliters to cups.
Browse this topic: Volume & Cooking Converters · Cooking Measurement Standards Guide.
Quick reference
| Input | Result |
|---|---|
| 5 mL | 0.1691 US fl oz |
| 10 mL | 0.3381 US fl oz |
| 15 mL | 0.5072 US fl oz |
| 20 mL | 0.6763 US fl oz |
| 30 mL | 1.0144 US fl oz |
| 50 mL | 1.6907 US fl oz |
| 100 mL | 3.3814 US fl oz |
| 150 mL | 5.0721 US fl oz |
| 200 mL | 6.7628 US fl oz |
| 250 mL | 8.4535 US fl oz |
| 295 mL | 9.9742 US fl oz |
| 500 mL | 16.9070 US fl oz |
| 750 mL | 25.3605 US fl oz |
| 1000 mL | 33.8140 US fl oz |
| 100 mL | 3.5195 imperial fl oz |
| 250 mL | 8.7988 imperial fl oz |
| 1 US fl oz | 29.5735 mL |
| 1 imperial fl oz | 28.4131 mL |
Accuracy and definitions
US customary and imperial fluid ounces are different units. Solveberry never silently substitutes one definition for the other; the selected standard is part of the calculation.
Reference standards
Where a published measurement definition applies, Solveberry links to primary standards rather than relying only on secondary converter sites.
- NIST Guide to the SI — Appendix B.8 conversion factors
- NIST Metric Kitchen — cooking measurement equivalencies
- BIPM SI Brochure — International System of Units
Methodology & verification
- Method
- Use 29.5735295625 mL per US fluid ounce or 28.4130625 mL per imperial fluid ounce, depending on the selected standard.
- Verification
- The displayed formula is cross-checked against Solveberry regression cases before release. Calculator inputs and results stay in the browser.
- Last reviewed
- 2026-08-19
Results are calculated locally in your browser. Optional analytics do not include calculator input values or results.
Common questions
How many fluid ounces is 100 mL?
100 mL is about 3.3814 US fluid ounces or 3.5195 imperial fluid ounces. The correct answer depends on which fluid-ounce standard you need.
How do I convert mL to oz?
Divide milliliters by 29.5735295625 for US fluid ounces, or by 28.4130625 for imperial fluid ounces.
Are US and imperial fluid ounces the same?
No. A US fluid ounce is 29.5735295625 mL, while an imperial fluid ounce is 28.4130625 mL.
Which fluid ounce should I choose?
Use the standard stated by the recipe, package, appliance, or source. If it is not stated, check the source country or documentation rather than assuming.
Can I convert in the opposite direction on this page?
Yes. Use the “Convert from” selector or Swap units button; Solveberry keeps both directions on one canonical page.
Why can my result differ slightly from another converter?
Differences usually come from rounding or from selecting a different regional measurement standard. Solveberry shows the factor or standard used on the page.