Changing Pixel quanty to hectares on a 1:10000 map

Hey,

I just had a question regarding changing a pixel quantity to a unit of measurement.

Previously, on 1:50000 maps, to change the number of pixels to hectares I multiplied the value of pixels by 0.25, because one pixel was 0.25 hectares. The data I was using was a 50m Digital terrain model, 50*50=2500 which = 0.25 hectares

Now on a 1:10000 map, Im unsure of what to times the pixel value by to get a value in hectares. The model is a 10m, so 10*10=100, so i should times my answer by 0.01 right? but that doesnt give the value I want, is that correct though?

Thanks