Hydrogen Tools

CMB.TECH offers a comprehensive tool for calculating the mass of hydrogen based on pressure, temperature, and volume, as well as for converting between mass and volume units. This calculator can help you obtain accurate and reliable results.

Hydrogen - System Mass Calculator

Calculate the hydrogen density and the overall system mass based on the volume, temperature and pressure:

Enter a value between 1 bar(a) and 1000 bar(a)
Enter a value between -255°C and 125°C
Add volume to calculate the Overall System Mass
Choose an amount of litres to calculate the Overall System Mass

H2 Density


Overall system mass


Hydrogen - Mass and Volume Equivalents

Convert between hydrogen mass and volume:

Convert kg to m3

Mass of Gas
Convert kg to m3

Volume of Gas (at 21 °C and 1 atm)


Convert m3 to kg

Volume of Gas (at 21 °C and 1 atm)
Convert m3 to kg

Mass of Gas


Discover CMB.TECH's frequently asked questions!


MARCH 30, 2023 in Industry
Antwerp Terminal Services (ATS) and CMB.TECH launch World’s First Hydrogen Dual Fuel Straddle Carrier

Antwerp Terminal Services (ATS), a joint venture between MSC PSA Europe Terminal (MPET) and PSA Antwerp (PSAA), today officially launched the world’s first H2 dual fuel straddle carrier in the Port of Antwerp during a brief ceremony. Using state-of-the-art H2 dual fuel combustion engine technology, developed by cleantech company CMB.TECH and integrated into a straddle carrier with the support of ATS, the machine runs on a mix of hydrogen and diesel. It can therefore play an important role in reducing terminal greenhouse gas emissions.

Hydrocat 01
FEBRUARY 27, 2023 in Marine
The Hydrocat 48 won in the Marine category at the Hydrogen Awards

CMB.TECH won at the Hydrogen Awards with the Hydrocat 48 in the Marine Category!

Bulk Carrier CM Bpowered By Ammonia
JANUARY 31, 2023 in Marine
WinGD and CMB.TECH co-develop large ammonia-fuelled engines

WinGD and CMB.TECH bring combined expertise to zero-carbon fuel technology in groundbreaking collaboration for fleet of ammonia fuelled bulk carriers.