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Technical resources

Tools for the hydrogen engineer

Free calculators and utilities to speed up day-to-day engineering work on green hydrogen and renewable gas projects. No sign-up, no cost.

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Calculators and classifiers

Free Interactive

PED Classifier · Directive 2014/68/EU

Answer a few questions to get an indicative PED category (I–IV) and the applicable conformity assessment module for your pressure equipment. Includes a downloadable PDF report.

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Free Interactive

Safety Distance Calculator · NFPA 2

Minimum safety distances for GH2 and LH2 storage and dispensing stations, per NFPA 2 (2020, 2023 and 2026 editions) — by actual pipe diameter, with firewall reduction and a downloadable PDF report.

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Free Interactive

Hydrogen Periodic Table

Explore Molaris's interactive, visual periodic table of hydrogen.

Open tool

Note: the PED classifier and NFPA 2 calculator are fully available in English. The interactive periodic table is hosted on a third-party platform and is currently Spanish-only.

Why we use them ourselves

Tools built from real engineering projects

Internal use first
These are the same calculators we use on our own hydrogen engineering projects.
Real regulatory basis
Based on current regulation (PED Directive 2014/68/EU, NFPA 2), not generic approximations.
No sign-up
Instant indicative results, with a downloadable PDF report where applicable.

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