How many cubic meters are in one US oil barrel?

One US oil barrel equals exactly 0.158987294928 cubic meters (m³). For everyday use, 0.158987 m³ is precise enough.

How do I convert barrels to cubic meters manually?

Multiply the number of US oil barrels by 0.158987294928. For example, 10 bbl × 0.158987 = 1.58987 m³.

What is the difference between a US oil barrel and a US fluid barrel?

A US oil barrel (bbl) equals 42 US gallons (158.987 L or 0.158987 m³). A US fluid barrel equals 31.5 US gallons (119.240 L or 0.119240 m³). The oil barrel is standard in crude oil trading; the fluid barrel is used in some industrial and brewing contexts.

How many barrels fit in one cubic meter?

One cubic meter holds approximately 6.2898 US oil barrels (divide 1 by 0.158987). For US fluid barrels, 1 m³ ≈ 8.3864 barrels.

Why do petroleum engineers use cubic meters instead of barrels?

The metric system (SI) is the international standard for engineering and science. Many countries and contracts specify volumes in m³. Converting accurately between bbl and m³ is required for cross-border oil trade, pipeline engineering, and regulatory filings.

Barrels to Cubic Meters Converter

Enter US oil barrels or US fluid barrels and get the cubic meter equivalent instantly, with reverse conversion included.

Converter

Barrel type

Barrels (bbl)

= — cubic meters (m³)

Cubic meters (m³) — reverse

= — barrels (bbl)

1 bbl (oil) = 0.158987294928 m³ | 1 m³ = 6.28981 bbl

Common conversions

Barrels (bbl)	Cubic meters (m³)

Summary

Enter US oil barrels or US fluid barrels and get the cubic meter equivalent instantly, with reverse conversion included.

How it works

Select barrel type: US oil barrel (42 US gal) or US fluid barrel (31.5 US gal).
Enter a value in barrels in the top input field.
The cubic meter result appears instantly — no button needed.
Use the reverse field to convert cubic meters back to barrels.
Click "Copy" next to any result to copy it to your clipboard.

Use cases

Convert crude oil production volumes from barrels to cubic meters for metric reports.
Translate pipeline throughput figures between bbl/day and m³/day.
Verify barrel volumes on international commodity invoices that use SI units.
Cross-check tank and vessel capacities between US and metric specs.
Calculate storage requirements when switching between barrel and cubic meter units.
Convert fluid barrel volumes for brewing or chemical industry reporting.

Frequently Asked Questions

Last updated: 2026-09-19 · Reviewed by Nham Vu