How much does a concrete cinder block weigh underwater?

to figure it out you just need to take the weight of the cinderblock and minus the weight of the same amount of water. to find that get a tub of water filled to the brim and put it in some thing that can catch the water that spills out when you put the cinderblock in the tub. then all you have to do is weigh the water and deduct that from the weight of the cinderblock. then the weight remaining is the weight unerwater of the cinderblock