We have a project at school about making more energy efficient buildings. We are using this software called Energy3D concord. In the window where you can edit the volumetric heat capacity, the units are $\frac{kWh}{m^3 C}$ as shown in the image. I can't find these units anywhere online in any converter.
Someone please help me because all my units need to be in SI form $\frac{J}{m^3 K}$. If someone could give me a formula that I can use, it would be of great help.
Thanks in advance,
Regards, Akhil