Meraki access points equipped with omnidirectional antennas typically achieve a range of 100 meters.
But this is in theory, in practice it will depend a lot on the type of implementation.
In high-density environments, for example, we should consider one AP per square meter.
I particularly take into account the number of clients per floor x3 (considering that each user will have at least 3 devices) and considering up to 50 clients per AP (30 is recommended).
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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