MT-BBL·Calculator

Metric tonnes ⇄ US barrels, weighted by API gravity — the same reference density used across crude and refined product cargoes.

Conversion direction

Metric tonnes

API gravity

34.0 °API

5 (heavy) 70 (light)

Quick select — typical grade

6,289.81

US barrels

Specific gravity (60°F)0.8550

Density854.34 kg/m³

Barrels per tonne6.28981

Tonnes per barrel0.158987

Density derived from API gravity via SG = 141.5 / (131.5 + API) at 60°F, referenced against 999.016 kg/m³ water. Volume conversion uses 1 US barrel = 0.158987294928 m³. Actual cargo factors can vary slightly with observed temperature and lab-measured density — treat this as a planning estimate, not a custody-transfer figure.