This converter turns US fluid ounces into milliliters instantly, using the exact factor 1 US fluid ounce = 29.57352956 milliliters. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
One eighth of a US cup, roughly 29.57 millilitres. One thousandth of a litre, equal to one cubic centimetre.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
US fluid ounces- The amount you are converting, measured in US fluid ounces
29.57352956- The exact number of milliliters in one US fluid ounce
milliliters- The converted result
How it works, step by step
- Enter the number of US fluid ounces you want to convert.
- The value is multiplied by 29.57352956, the exact conversion factor.
- The result is displayed in milliliters, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 US fluid ounces
Multiply 5 by 29.57353. That gives 147.8676 milliliters. A quick sanity check: one US fluid ounce is larger than one milliliter, so the number should get bigger — and it does.
Converting 72 US fluid ounces
72 × 29.57353 = 2,129.29 milliliters. Working backwards, 2,129.29 ÷ 29.57353 returns 72 US fluid ounces, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many milliliters are in one US fluid ounce?
Exactly 29.57352956. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert US fluid ounces to milliliters?
Milliliters = US fluid ounces × 29.57352956. To reverse it, divide instead: US fluid ounces = milliliters ÷ 29.57352956, which is the same as multiplying by 0.0338140227.
Is the US fluid ounce bigger than the milliliter?
Yes. One US fluid ounce equals 29.5735 milliliters, so it is the larger unit.
Why does my answer differ slightly from other us-fluid-ounces to ml converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a US fluid ounce?
One eighth of a US cup, roughly 29.57 millilitres.
What is a milliliter?
One thousandth of a litre, equal to one cubic centimetre.
Us Fluid Ounces to milliliters reference table
| Us Fluid Ounces | Milliliters |
|---|---|
| 0.5 fl oz | 14.7868 mL |
| 1 fl oz | 29.5735 mL |
| 2 fl oz | 59.1471 mL |
| 3 fl oz | 88.7206 mL |
| 5 fl oz | 147.8676 mL |
| 10 fl oz | 295.7353 mL |
| 15 fl oz | 443.6029 mL |
| 20 fl oz | 591.4706 mL |
| 25 fl oz | 739.3382 mL |
| 50 fl oz | 1,478.68 mL |
| 75 fl oz | 2,218.01 mL |
| 100 fl oz | 2,957.35 mL |
| 250 fl oz | 7,393.38 mL |
| 500 fl oz | 14,786.76 mL |
| 1000 fl oz | 29,573.53 mL |
Exact factor: 1 US fluid ounce = 29.57352956 milliliters. Values rounded for display.