Frequently asked questions - Calculation tools

No, calculation tools are online proprietary calculation software used to calculate the environmental performance of construction works based on environmental data in the NMD. Stichting NMD has formulated calculation rules to clarify and control how the Assessment Method should be converted into a digital instrument. The rules ensure that the calculation tools use a uniform calculation, which provides an unambiguous result for the energy performance of buildings.

Before receiving the ‘validated’ stamp, the calculation tools must be verified using a validation procedure; the NMD software validation guidelines. Stichting NMD uses this validation procedure to check whether the calculation rules have been used and whether the Assessment Method and the NMD have been implemented properly in the software.
A one-off registration fee of € 15,762 applies to the use of the entire database plus an annual licence fee of € 2,589 for NMD use and updates. The stated amounts exclude VAT and apply from 1 January 2021 to 1 January 2022.