Milliliters to Fluid Ounces Converter
Common Conversions
| mL | fl oz |
|---|---|
| 5 | 0.169 |
| 10 | 0.338 |
| 25 | 0.845 |
| 29.5735 | 1 |
| 50 | 1.691 |
| 100 | 3.381 |
| 250 | 8.454 |
| 500 | 16.907 |
| 750 | 25.361 |
| 1000 | 33.814 |
| 2000 | 67.628 |
Why this conversion matters in chemistry
Take uS-site chemical-inventory reconciliation. A 100 mL EU-sourced anhydrous DMF bottle lands at 3.38 fl oz on a legacy US inventory record — the value when bridging an EU-sourced purchase order into a CAS-keyed inventory database for hazard-communication compliance. The ratio of 0.033814 fl oz per mL is just 1 US fl oz = 29.5735 mL, fixed through the 1 US gallon = 128 fl oz definition. It's the unit step at the boundary of SI reagent specs and US-customary inventory documentation.
Formula
fl oz = mL × 0.033814
Worked Examples
1000 mL = 33.814 fl oz
One liter in US fluid ounces — about 32 fl oz.
250 mL = 8.454 fl oz
A common Erlenmeyer flask volume in fl oz.
500 mL = 16.907 fl oz
Standard reagent-bottle size — about a US pint.
29.5735 mL = 1 fl oz
Exactly one US fluid ounce — the conversion anchor in reverse.
Frequently Asked Questions
How do I convert mL to fl oz?
Multiply by 0.033814. So 500 mL becomes 16.907 fl oz. The factor is exact through 1 US fl oz = 29.5735 mL.
How many mL is 1 fl oz?
Exactly 29.5735 mL for the US fluid ounce. The figure drops out of 1 US gallon = 128 fl oz = 3785.41 mL.
Why would a chemist convert mL to fl oz?
Reading US-side household chemical product formulations, working with educational protocols using imperial volumes, or reconciling US-side legacy chemical inventory records that were never moved to metric.
Is US fl oz different from UK fl oz?
Yes. 1 US fl oz = 29.5735 mL; 1 UK (imperial) fl oz = 28.4131 mL — about 4% smaller. Always note which system the source uses; chemistry usually stays metric and skips the question.