Free Barrels to Metric Tons Calculator - Oil & Water Barrels
Convert oil barrels or water barrels into metric tons, US short tons, kilograms, and pounds using accurate liquid density.
Formula & Methodology
Barrels are converted to litres using the correct barrel size, multiplied by density for mass, then expressed in tons and pounds.
- Litres = Barrels × Barrel Size (159 L oil / 119.24 L water)
- Kilograms = Litres × Density (kg/L)
- Metric Tons = Kilograms ÷ 1,000
Worked Example
Using the Barrels to Metric Tons Calculator: apply the formula above to your input values. For instance, Litres = Barrels × Barrel Size (159 L oil / 119.24 L water), then Kilograms = Litres × Density (kg/L). The tool performs each step instantly and shows the result.
Frequently Asked Questions
How many metric tons are in a barrel of oil?
Roughly 0.13–0.14 metric tons for crude oil, depending on grade. One oil barrel is 42 US gallons (about 159 litres), and crude density is around 0.87 kg/L.
What is an oil barrel volume?
A standard oil barrel is 42 US gallons, or about 158.99 litres. A US water/liquid barrel is 31.5 gallons, about 119.24 litres.
How do I convert barrels to metric tons?
Convert barrels to litres, multiply by the liquid density in kg/L to get kilograms, then divide by 1,000 for metric tons.
Why does petroleum trade in both barrels and tons?
Barrels measure volume for trading, but shipping, tariffs, and refining capacity are often expressed by weight, so conversion is routine in the industry.
Can I convert for refined fuels?
Yes. Choose gasoline, diesel, jet fuel, or another product, or enter a custom density for a specific blend.
How accurate is the barrel-to-ton conversion?
It is exact once density is known. Because crude and product densities vary by source and temperature, use the actual measured density for contracts.