Free from Nexus Broadcast
NAD27 to NAD83 coordinate converter
Old tower records, deeds and FAA studies often give coordinates in NAD27; today's FCC filings use NAD83. Convert either way with NOAA's official NADCON 5 grids, in decimal degrees or degrees, minutes and seconds.
32° 26′ 18.39″ N 82° 40′ 57.51″ W
NAD27, converted from NAD83(1986) with NADCON 5.0.
| NAD83(1986) (entered) | 32° 26′ 19.00″ N 82° 40′ 57.00″ W32.438611, -82.682500 |
|---|---|
| NAD27 | 32° 26′ 18.39″ N 82° 40′ 57.51″ W32.438443, -82.682641 |
| Rounded to the second | 32° 26′ 18″ N 82° 40′ 58″ W |
| Shift | 18.6 m south, 13.3 m west22.9 m (75 ft) in all |
| NOAA's stated uncertainty | ±0.11 m latitude, ±0.07 m longitudeOne standard deviation of the NADCON 5 transformation here |
| UTM (NAD27) | UTM Zone 17: 3,590,092.415 m N, 341,813.359 m EUSNG 17SLR4181390092 |
Studying a site?
RF Navigator takes NAD83 coordinates straight into FM, LPFM, translator, AM and TV studies, and Nexus Broadcast can handle the engineering and the FCC filing for you.
About the conversion
- Every conversion is NOAA's: the National Geodetic Survey's NCAT service with the NADCON 5.0 transformation grids, the official way to move coordinates between NAD27 and NAD83.
- NAD83 here is NOAA's NAD83 (1986), the original NAD83; FCC applications give coordinates in NAD83. The shift from NAD27 is typically tens of meters in the lower 48 and more in Alaska.
- NAD27 was used in the contiguous U.S. and Alaska only, so points in Hawaii, Puerto Rico and the territories can't be converted from it.
- The two coordinates entered are taken as being in the datum you convert from. A bare positive longitude is read as west.
NOAA's own tool: NCAT (and about NADCON 5).
For planning. Not a product of NOAA or the FCC.