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
36.38964-83.56867 36.389554-83.568781
36° 23.3784'83° 34.1202' 36° 23.3733'83° 34.1269'
36° 23' 22.70"83° 34' 7.21" 36° 23' 22.40"83° 34' 7.61"
269613E 4030232N 17 269597E 4030021N 17

    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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