---
title: "40 mL to gal = 0.010567 gal"
description: "40 milliliters is 0.010567 US gallons. The arithmetic, a table of nearby values, and a converter for any other number."
url: https://atoneplace.net/convert/40-ml-to-gallons/
site: "At One Place"
---

# 40 mL to gal

**40 milliliters in US gallons: 40 mL = 0.010567 gal**

gal = mL × 0.000264172052

40 milliliters is 0.010567 US gallons. To get there, multiply by 0.000264172052.

## Values either side

*Milliliters near 40, converted to US gallons.*

| Milliliters | US gallons |
| --- | --- |
| 32 mL | 0.0084535 |
| 35 mL | 0.009246 |
| 36 mL | 0.0095102 |
| 37 mL | 0.0097744 |
| 40 mL ← | 0.010567 |
| 45 mL | 0.011888 |
| 50 mL | 0.013209 |
| 55 mL | 0.014529 |
| 60 mL | 0.01585 |

## How the conversion works

The relationship is gal = mL × 0.000264172052. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

> US gallon: US liquid gallon. The imperial gallon is about 20% larger.

## Common questions

### What is 40 mL in US gallons?

40 mL is 0.010567 gal.

### How do you convert milliliters to US gallons?

Multiply by 0.000264172052.

## Related pages

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

## 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/)