How much sea level rise will we experience if the entire of Greenland's ice shelf melts?

The best estimate that can be quoted right now is actually what the previous answer states: the sea level will rise about 3% if the entirety of Greenland’s ice shelves melt. This means it could potentially add three meters of water to the sea if the entire ice shelf melted. However, as the previous answer also states, much of the ice that melts comes from areas inland and stops on snow, which allows it to refreeze on the ice shelf.

This is the best answer that can be given right now. However, it could also be worse than that if there were to be dumped into the sea all at once. Rising sea levels means coasts will disappear and move inward.

In the worst scenario, where the whole of Greenland's ice melts, the seas could experience a rise of as much as 3% in their level. Although last year the melting of Greenland ice was the least since 1996, the rate of melting overall is said by scientists to be the greatest for 400 years. It is a scary prospect, but bear in mind that although melted ice does flow into the sea a substantial proportion flows onto snow and refreezes. This does affect the accuracy of estimates of potential sea level rise.