1 lb = 0.453592 kg (to 6 dp)
so 20 lb = 9.071847 kg = 9071847 mg
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1 pound = 0.000446428571 gross ton gross ton , 1 gross ton = 2240 pounds.
2500 mg = 0.0055 pounds, approx.
Answer: 300 mg = 0.000661 lbs.
30 mg
1 gram = 1,000 mg 2 grams = 2,000 mg 20 grams = 20,000 mg