Converting to Latitude-Longitude from Degrees-Minutes-Seconds to Decimal The formula is: Degrees+(minutes/60)+(seconds/3600) Example - 30° 55' 32.5" = 30.92593° 5 decimal places is equal to approximately 3.6 US Feet. You can truncate for less accuracy or expand for more.   A B C 30° 55' 32.5" (divide by 60) (divide by 3600) = 0.91666 = 0.00927 Add B + C .92593 Add A and Sum of B+C 30.92593

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