FootingCalc

Free calculator

Concrete Pad Calculator

Interior support pads for posts and columns: volume per pad, total concrete, bags, and cost — for one pad or the whole beam line.

Pad dimensions

Common residential pads: 38″×38″×12″ · 42″×42″×19″ · 46″×46″×16″. Pour to your approved plan's pad schedule.

Concrete needed

0 YD³ total
Per pad0 ft³
Total cubic feet0
Bags (80 lb)0
Est. concrete cost$0.00

Bag count is total for all pads, rounded up. Multi-pad jobs are normally poured from the footing truck.

Doing whole plans, not single runs?

FootingTakeoff reads a footing plan and returns total linear feet, pad count, and an invoice at your rates — automatically.

See FootingTakeoff

Pad math

ft³ per pad = (L÷12) × (W÷12) × (D÷12)   ·   total = ft³ × count × (1 + waste%)

Pads are counted, not measured in linear feet — they're isolated footings under point loads, sized by the load and soil. On a takeoff, count them off the beam line and keep them as their own line item. For the footing runs themselves, use the linear feet calculator or the footing volume calculator.

FAQ

Pad questions, answered.

What is a concrete pad footing?
An isolated square or rectangular footing poured inside the foundation to carry a point load — usually the steel or wood posts supporting the main beam of the house. Residential pads commonly run 38x38 up to 46x46 inches, 12 to 19 inches deep, dug and formed by the footing crew.
How much concrete does a support pad take?
Length x width x depth, converted to feet. A 42 x 42 x 19 inch pad is (3.5 x 3.5 x 1.583) = about 19.4 cubic feet, or roughly 0.72 cubic yards — call it 33 x 80 lb bags, which is why multi-pad jobs are usually poured with the footing truck, not mixed by hand.
How are pads billed?
Footing subs typically bill pads at a flat rate per pad regardless of exact size, separate from the per-linear-foot footing price, because the work per pad (hand digging, forming, pouring) is roughly constant.
How many pads does a house have?
Most houses have 0 to 5 interior support pads along the main beam line; long houses and open floor plans need more posts and therefore more pads. The count comes off the foundation plan.