---
title: "Oil barrels to US gallons — bbl to gal converter"
description: "1 oil barrel = 42 US gallons. Convert oil barrels to US gallons with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/barrels-to-gallons/
site: "At One Place"
---

# Oil barrels to US gallons

**1 oil barrel in US gallons: 1 bbl = 42 gal**

gal = bbl × 42

To convert oil barrels to US gallons, multiply by 42. The table below gives the values people look up most often, and the converter works for any number.

## Oil barrels to US gallons table

*Common oil barrel values converted to US gallons.*

| Oil barrels | US gallons |
| --- | --- |
| 1 bbl | 42 |
| 2 bbl | 84 |
| 3 bbl | 126 |
| 4 bbl | 168 |
| 5 bbl | 210 |
| 10 bbl | 420 |
| 15 bbl | 630 |
| 20 bbl | 840 |
| 25 bbl | 1,050 |
| 30 bbl | 1,260 |
| 40 bbl | 1,680 |
| 50 bbl | 2,100 |
| 75 bbl | 3,150 |
| 100 bbl | 4,200 |
| 250 bbl | 10,500 |
| 500 bbl | 21,000 |
| 1,000 bbl | 42,000 |

## How the conversion works

The relationship is gal = bbl × 42. 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.

> Oil barrel: Petroleum barrel = 42 US gallons.

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

## Common questions

### How many US gallons are in one oil barrel?

One oil barrel equals 42 US gallons. gal = bbl × 42.

### How do you convert oil barrels to US gallons?

Use gal = bbl × 42. So 10 bbl is 420 gal.

### How many oil barrels are in one US gallon?

One US gallon equals 0.02381 oil barrels, which is the reverse of the conversion above.

### Is there more than one kind of oil barrel?

Petroleum barrel = 42 US gallons. US liquid gallon. The imperial gallon is about 20% larger.

## Related pages

- [US gallons to Oil barrels](https://atoneplace.net/convert/gallons-to-barrels/)
- [Oil barrels to Liters](https://atoneplace.net/convert/barrels-to-liters/)
- [Oil barrels to Milliliters](https://atoneplace.net/convert/barrels-to-ml/)
- [Oil barrels to Cubic meters](https://atoneplace.net/convert/barrels-to-cubic-meters/)
- [Oil barrels to US quarts](https://atoneplace.net/convert/barrels-to-quarts/)
- [Oil barrels to US pints](https://atoneplace.net/convert/barrels-to-pints/)
- [Oil barrels to US cups](https://atoneplace.net/convert/barrels-to-cups/)
- [Oil barrels to US fluid ounces](https://atoneplace.net/convert/barrels-to-fl-oz/)
- [Oil barrels to Tablespoons](https://atoneplace.net/convert/barrels-to-tablespoons/)
- [Oil barrels to Teaspoons](https://atoneplace.net/convert/barrels-to-teaspoons/)

## 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/)