Metric km per hour during running/walking training

hi all, I'd like to check my speed while using training app on apple watch 4, but the only one that I can see from multiple metrics setting for running and walking is km per minute, while I'd like to see km per hour. Do you know How I can change it?

I have the same issue while using runtastic from apple watch (while using it on iphone I can choose speed km per hour)

can someone tell where I can change this preference?

Thanks