Convert the mass to kgs thanks
Mass (g) Mass (kg)
1000g
500g
100g
50g
20g
10g

Memorize this and you'll be able to do ALL of these:  1  kg = 1,000 gSo if you have some grams, divide the number by 1,000 to get kilograms.1,000 g = 1.000 kg 500 g = 0.500 kg 100 g = 0.100 kg 50 g = 0.050 kg 20 g = 0.020 kg 10 g = 0.010 kg