---
title: "40 mL to fl oz = 1.352561 fl oz"
description: "40 milliliters is 1.352561 US fluid ounces. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/40-ml-to-fl-oz/
site: "At One Place"
---

# 40 mL to fl oz

**40 milliliters in US fluid ounces: 40 mL = 1.352561 fl oz**

fl oz = mL × 0.0338140227

40 milliliters is 1.352561 US fluid ounces. To get there, multiply by 0.0338140227.

## Values either side

*Milliliters near 40, converted to US fluid ounces.*

| Milliliters | US fluid ounces |
| --- | --- |
| 32 mL | 1.082049 |
| 35 mL | 1.183491 |
| 36 mL | 1.217305 |
| 37 mL | 1.251119 |
| 40 mL ← | 1.352561 |
| 45 mL | 1.521631 |
| 50 mL | 1.690701 |
| 55 mL | 1.859771 |
| 60 mL | 2.028841 |

## How the conversion works

The relationship is fl oz = mL × 0.0338140227. Both units measure volume, so the conversion is a fixed factor that never changes.

## Common questions

### What is 40 mL in US fluid ounces?

40 mL is 1.352561 fl oz.

### How do you convert milliliters to US fluid ounces?

Multiply by 0.0338140227.

## Related pages

- [Milliliters to US fluid ounces](https://atoneplace.net/convert/ml-to-fl-oz/)
- [40 fl oz to mL](https://atoneplace.net/convert/40-fl-oz-to-ml/)
- [32 mL to fl oz](https://atoneplace.net/convert/32-ml-to-fl-oz/)
- [35 mL to fl oz](https://atoneplace.net/convert/35-ml-to-fl-oz/)
- [36 mL to fl oz](https://atoneplace.net/convert/36-ml-to-fl-oz/)
- [37 mL to fl oz](https://atoneplace.net/convert/37-ml-to-fl-oz/)
- [45 mL to fl oz](https://atoneplace.net/convert/45-ml-to-fl-oz/)
- [50 mL to fl oz](https://atoneplace.net/convert/50-ml-to-fl-oz/)
- [55 mL to fl oz](https://atoneplace.net/convert/55-ml-to-fl-oz/)
- [60 mL to fl oz](https://atoneplace.net/convert/60-ml-to-fl-oz/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)