The newton. (The kilogram is not a unit of weight or force.)
gram
You best bet would probably be to use kilograms.
The SI unit for measuring weight (the force due to gravity) is the newton.The SI unit for measuring mass is the kilogram.
Ounces
cm
It is a metre.
The metric unit for measuring human weight is actually the Newton (N). Newton's are a measure of force and weight is the product of the acceleration of gravity and an objects mass. The metric unit for measuring human mass is the kilogram (kg).
In liters
barman curls -2
A unit, for measuring mass (or in imprecise language) weight.
The appropriate unit for weight is a Newton.
Mililiter