Trapezoid field calculator Trapezoid field calculator Data for calculations Trapezoid field – calculator The length of the longer base (a) cal (in)centimeter (cm)decymetr (dm)jard (yd)electric wirekilometers (km)meters (m)English mile (me)dear sea (nmi)millimeter (mm)english foot (ft)Inch sunShaku shaku Length of the shorter base (b) cal (in)centimeter (cm)decymetr (dm)jard (yd)electric wirekilometers (km)meters (m)English mile (me)dear sea (nmi)millimeter (mm)english foot (ft)Inch sunShaku shaku Height (h) cal (in)centimeter (cm)decymetr (dm)jard (yd)electric wirekilometers (km)meters (m)English mile (me)dear sea (nmi)millimeter (mm)english foot (ft)Inch sunShaku shaku Surface (A) akr (acre)Withsquare inch (sq in)square centimeter (cm²)hectare (ha)square yard (yd²)square kilometer (km²)square meter (m²)square milesquare millimeter (mm²)square foot (ft²)Tsubo tsuboAyumu buTatami jō