1,800 pounds is 816,470 grams.
453.592 grams weigh 1 pound on earth 1800 grams weigh (1,800 / 453.592) = 3.968 pounds (on earth, rounded)
1,800 g = about 3.97 pounds.
20 grams = about 0.04409 pounds.
10 pounds = about 4,536 grams.
1500 grams = 3.307 pounds.
6.4 grams is about 0.01411 pounds.
865 grams is about 1.907 pounds.
1,144 grams = about 2.522 pounds.
1600 grams = 3.53 pounds
493 grams = about 1.087 pounds.
768 grams = about 1.6932 pounds.
1.5 grams is about 0.00331 pounds.