Best way to measure salt for new water?

[gregzz4]

I've found success with a measuring cup using IO. Maybe my measuring cup is off a bit but meh ...

When I add 9x375ml of salt to 26g of RO I get a perfect 1.026 the next evening

Any other volumes I just adjust the #s

[emerald crab]

I always weigh all the ingredients of my SW and the results are pretty consistent.
I weigh K, Mg and Ca chloride and the salt (I.O.), Lugols solution goes by the drop.