If you have checked-in baggage, travelling on economy class, you may take up to 20 kg (44 lbs) . One item of cabin baggage weighing up to 8 kg (18 lbs). On business class checked-in baggage can weigh up to 30 kg (66 lbs).Two items of cabin baggage can weigh a total of 8 kg (18 lbs). If you are travelling without any checked-in baggage, you can bring up to 15 kg (33 lbs) of cabin baggage.
For more details visit : http://www.airgreenland.com/Baggage/Baggage-Information