Calculator

Try cet_units directly in this page. Enter a quantity or a calculation (anything pint can parse) and, optionally, a target unit and a GWP assessment context.

Quantity or calculation

Target unit (optional)

GWP context (optional) (none)

Evaluate Copy Link

Loading Python runtime…

Examples: USD_2020 → EUR_2024 Mt CH₄ → Mt CO₂eq kg H₂ → kWh H₂ (LHV) advanced calculation

How it works

The calculator above works locally in your browser via Pyodide — a WebAssembly build of CPython.

When the field for a target unit is left empty, the expression is evaluated and reduced to its default units, equivalent to:

from cet_units import ureg

ureg("2 MWh/t * 3 Mt").to_reduced_units()

When a target unit is given, .to(target) is used instead. When a GWP context is also given (e.g. AR6GWP100), it is passed along as .to(target, context), as required for converting between different greenhouse-gas species.

The page address bar always reflects the current inputs, so it can be copied and shared directly; the "Copy Link" button does the same via the clipboard. Opening a shared link pre-fills the form and evaluates it automatically.