WGS84/NAD27 converter
Most on-line map services and GPS's use the WGS84 datum, but the USGS topo maps are published in the NAD27 datum. The 1 kilometer UTM grid on the 7.5' quads is useful for off-trail adventures. Use a yardstick to draw in the grid lines (see example), then set your GPS readouts to NAD27 and UTM.

WGS84 NAD27
35.7972-85.6215 35.797102-85.621547
35° 47.8320'85° 37.2900' 35° 47.8261'85° 37.2928'
35° 47' 49.92"85° 37' 17.40" 35° 47' 49.57"85° 37' 17.57"
624562E 3962332N 16 624561E 3962121N 16

    show maps for this location (WGS84) Google topo

 

With the form below you can convert between lat/lon and UTM and between the WGS84 and NAD27 datums. Latitude/longitude can be represented as 36.12345, or 36 44.333, or 36 22 14.5 and degree, minute, seconds symbols will be ignored.

Latitude: Longitude:
     

 

  UTM Easting: Northing: Zone:
     

 

  NABSQNO: WGS84 UTM (Z-E-N), e.g. 16S-598278-3890594
     

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