GWP-ODP Calculator

The OzonAction GWP-ODP Calculator app will help you to convert between values in metric tonnes, ODP tonnes and CO2-equivalent tonnes (or kg) of substances controlled by the Montreal Protocol and their alternatives.

For single component substances simply select a substance from the dropdown list and enter the known value in the appropriate field (e.g. a quantity in Metric tonnes). The calculator will automatically perform the conversion between metric tonnes, ODP tonnes and/or CO2-equivalent tonnes (or kg) and display the corresponding converted values.

For Refrigerant Mixtures/Blends, simply select the name of the blend and enter the quantity. The calculator will display the corresponding total ODP tonnes and CO2-eq tonnes for that quantity of substance. The components of the mixture and their relative proportions (metric, ODP, CO2-eq) are also displayed.

The ODP, GWP and description of substance is also provided. The OzonAction GWP-ODP Calculator uses standard ODP values and GWP values to make the conversions.

This application is designed primarily for use by Montreal Protocol National Ozone Units and other related stakeholders. The application was produced by UN Environment OzonAction as a tool principally for developing countries to assist them in meeting their reporting and other commitments under the Protocol and is part of the OzonAction work programme under the Multilateral Fund for the Implementation of the Montreal Protocol.