Conversion Calculator for Units of SPREAD RATE (by mass)  or  AREA DENSITY Type in size . . . select units . . . kg/sq.metre oz/sq.inch oz/sq.foot pounds/sq.inch pounds/sq.foot pounds/sq.yard pounds/acre tons(UK)/acre tons(UK)/sq.mile tons(US)/acre tons(US)/sq.mile inches of rain mg/sq.mm mg/sq.cm grams/sq.mm grams/sq.cm grams/sq.metre kg/sq.metre kg/hectare tonnes/hectare tonnes/sq.km mm of rain then press Else Values are shown to . . . 3 4 5 6 7 8 9 significant figures. oz / sq.inch mg / sq.mm oz / sq.foot mg / sq.cm pounds / sq.inch grams / sq.mm pounds / sq.foot grams / sq.cm pounds / sq.yard grams / sq.metre pounds / acre kg / sq.metre tons(UK) / acre kg / hectare tons(UK) / sq.mile tonnes / hectare tons(US) / acre tonnes / sq.km tons(US) / sq.mile inches of rain mm of rain Unit shown in red is the SI 'preferred' unit. oz is the abbreviation for ounce(s). mg is the abbreviation for milligram(s). Very large and very small numbers appear in e-Format and have not been spaced. Unvalued zeros on all numbers have been suppressed. Caution NO guarantee as to the accuracy of these values is given. And they should be checked against some other source.