Deck Footing Size Calculator by Load
Deck footing size by load converts a post or pier load into required bearing area using allowable soil bearing, then checks a selected round or square footing.
deck footing size calculator by load footing size for load calculator post footing size by load
Required bearing area
A_required = load * factor / allowable_soil_bearing
Round footing diameter
D = sqrt(4 * A_required / pi)
Scope caution
Bearing area is only a preliminary screen. Frost depth, reinforcement, uplift, lateral loads, settlement, code and permit details remain separate.
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