Concrete Landing / Pad Calculator
Use this concrete landing calculator to estimate cubic yards and bag counts for rectangular porch and stair landings. A typical 4×4 landing at 4 inches thick requires about 0.20 cubic yards before waste. Add 5–10% extra to ensure full coverage.
Enter landing length, width, and thickness below to calculate volume instantly. For stair runs, use the concrete steps calculator and review the concrete cost per yard guide for pricing.
Inputs
Tip: For small landings and pads, waste of 5–10% is common. Add a little more if you are working around forms or steps.
Results
Assumptions
- Rectangular landing or pad with uniform thickness.
- Waste factor adds extra volume for spillage and form variation.
- Bag yield is an approximation; check your product label.
Example
A 6 ft × 4 ft landing at 4 inches thick with 10% waste is 0.33 yd³ of concrete. Adjust thickness and waste based on your landing design.
Common Landing Sizes & Concrete Needed
| Landing Size | Thickness | Cubic Yards | 80-lb Bags |
|---|---|---|---|
| 3×4 ft | 4 in | 0.15 yd³ | 7 bags |
| 4×4 ft | 4 in | 0.20 yd³ | 9 bags |
| 4×6 ft | 4 in | 0.30 yd³ | 13 bags |
| 5×6 ft | 6 in | 0.56 yd³ | 24 bags |
Estimates include 10% waste. Does not include steps.
Landing Calculator FAQs
How thick should a concrete landing be?
Most landings are 4 inches thick. Increase thickness if supporting heavy loads.
Do landings require footings?
In frost climates, footings must extend below frost depth. Check local building codes.
Should I reinforce a concrete landing?
Rebar or wire mesh helps reduce cracking, especially for larger platforms.