Concrete Linear Foot Calculator
By the Linear Feet Calculator Team | Reviewed by concrete and foundation contractors | Updated June 2026
Concrete footings, stem walls, curbs, and sidewalks are all estimated by the linear foot. Enter the dimensions of your project to calculate total linear footage and convert between linear feet and cubic yards.
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Linear Feet for Concrete
Calculate linear feet for concrete
Calculate by:
Footing = 12-24", sidewalk = 48", curb = 6"
Concrete Linear Foot Formulas
Perimeter LF (footings, stem walls):
LF = (2 × Length) + (2 × Width) + Interior Walls
LF = (2 × Length) + (2 × Width) + Interior Walls
Straight Run LF (sidewalk, curb, driveway edge):
LF = Run Length
LF = Run Length
Cubic Yards from LF:
CY = (LF × Cross-Section Width in ft × Thickness in ft) / 27
CY = (LF × Cross-Section Width in ft × Thickness in ft) / 27
Common Concrete Elements by Linear Foot
| Element | Typical Thickness | Typical Width | CY per 100 LF |
|---|---|---|---|
| Residential Footing | 8-12" | 12-16" | 3.7-5.6 |
| Stem Wall | 8" | 6-8" | 1.5-2.0 |
| Sidewalk (4 ft wide) | 4" | 48" | 4.9 |
| Curb | 6-8" | 6" | 0.9-1.2 |
| Retaining Wall (4 ft) | 8-10" | 48" | 9.9-12.3 |
Always order 10% extra concrete. Short loads cost more in delivery fees than the extra yard of concrete.