Determine approx. payload weight by motor output

I’m wondering what the best way to determine your current approximate payload weight based on motor output at hover is. Essentially this drone will be picking up various payloads and I’d like to be able to approximate the weight once hovering. Anyone have any tips for this? Thanks

probably best way is to make test fligts with different weights, and create sort of look-up table or approximate function. You can use current sensor too. I dont know how precision you need measurement, because it will be affected by speed of wind, air temperature and so on.

Yeah, I just need within 10 lb accurace. Thanks David, I’ll probably just do that