The conversion table has been a popular page since 1995
or just saying Hi, or reading about relativity or going mountaineering... then send me some mail
Also see "The loan arranger" for a useful loan calculating tool. It uses logarithms kids, they are useful.
For all the above use this for precision adjustment(sort of rounding, 6 is good) avoids .999999 type answers
Degrees Minutes Seconds =><= Decimal Degrees (values in degrees minutes seconds will be automatically adjusted modulo 360, 60 and 60 respectively)
Convert to and from Decimal Latitude and Longitude AND GRS-80 zone and Grid coordinates using Redfearn formula
Note: entering silly values in these cells may give you coordinates in an alternate universe.
Decimal Latitude Decimal Longitude
GRS-80 Zone Easting Northing
See an implementation of this with google maps API which I am experimenting with here. Hint go there on your mobile phone to use geolocation
Calculate Bearing between two grid references (can be any even number of digits usually 6 or 8)