you guys know you can check your spring scales with water right??
Water, Tap water is consistent enough to get you with in 1 ounce on the scale
1 ounce of water is quite a bit to be off on a measuring cup. so the chances of you being off are slim.
Just measure one pound (pint at a time) in a measuring cup, come up to the same point and dump water into larger vessel. works every time.
How do you deal with the weight of the container?
Also, according to what I just read, 2 cups of water weigh 1.0425 pounds so it's going to be hard to come to exactly 1 pound using volume measures.
IOW, do all my thinking for me!
