Gas cooktop 1/2 inch gas line

I'd like to replace my electric glass cooktop with a 4-5 burner gas cook top. There is fairly easy access to a 1/2 inch gas line on the patio outside the kitchen wall. If we can connect to this 1/2 gas line will it be big enough to run the cook top? I have separate double ovens (also electric) so the gas line will only be supplying the 4 or 5 burner gas cook top.