Milliliters (metric) and US fluid ounces come from two different measurement systems, but the exact conversion factor between them makes this a precise calculation.
How it works
Dividing milliliters by 29.5735295625 gives fluid ounces; multiplying fluid ounces by that same constant gives milliliters back. Type into either field and the other updates instantly.
What this does not include
This does not include the UK/imperial fluid ounce, which is a different size (about 28.41 mL) from the US fluid ounce used here.
How to use this calculator
- Enter a value in either milliliters or fluid ounces — the other field fills in automatically.
Frequently asked questions
Why does most of the world use milliliters instead of fluid ounces?
Milliliters are part of the metric system, used as the standard measurement system in most countries outside the United States — fluid ounces are specific to the US customary system.
Is this the same conversion as the site’s oz-to-ml calculator?
Yes, functionally identical — this version just leads with milliliters first, for anyone specifically searching “ml to oz” rather than “oz to ml.”
What’s a typical use case?
Reading a European or Asian product’s metric volume label and converting it to the US fluid ounces most American measuring cups and bottles use, or vice versa.
