;surface areas ;Written by: Ralph W. Reid ;base value: SQUARE MILES 1.9430129664E042 SQUARE ATTOMETERS 1.9430129664E036 SQUARE FEMTOMETERS 1.9430129664E030 SQUARE PICOMETERS 1.9430129664E024 SQUARE NANOMETERS 4.0144896E021 SQUARE MICRONS 1.9430129664E018 SQUARE MICROMETERS 4.0144896E015 SQUARE THOUSANDTHS 1.9430129664E012 SQUARE MILLIMETERS 1.9430129664E010 SQUARE CENTIMETERS 4.0144896E009 SQUARE INCHES 2.78784E007 SQUARE FEET 3.0976E006 SQUARE YARDS 1.9430129664E006 SQUARE METERS 6400 SQUARE CHAINS 640.0 ACRES 1.9430129664 SQUARE KILOMETERS 1.0 SQUARE MILES