Typical hair dryer is in the ~1800 watt range (15 amps). 1875 seems to be the typical number I see, I suspect thats about as much as you can push on the typical older 15 amp circuit without nuisance trips.
Common microwave is 1000watts, but thats output power. 1500 watts input is typical for that output power. plus if its over the range, there's the range lights and blower, also. Checked out 1000 watt GE, its plate states 1.5kW.