How much concrete do I need for a curb? Calculate cubic yards, bags, weight, and cost for curbs, borders, and mow strips. Enter your curb length and profile for instant estimates.
Curb Details
10% recommended for curves, joints, and spillage
Ready to calculate
Enter your curb dimensions for material estimates
Last updated March 2026 by our expert review team
Installed prices including materials and labor. DIY material cost is roughly 30% to 40% of installed price.
Ehsan Ghazanfari
Licensed Structural Engineer
FISE-certified structural engineer with 11+ years designing bridges, retaining walls, and foundations. MSc from Aalto University.
See full profileHawkin
Certified Cost & Estimating Professional
AACE-certified estimator working with 20+ insulation companies including the two largest franchises in America.
See full profileUpdated March 2026
How we verify our calculatorsAlways compact the base with 4 inches of gravel before pouring curb concrete. A loose base leads to settling and cracking within the first year.
For large curb projects over 2 cubic yards, ready-mix is more cost-effective than bags. Use our concrete slab calculator for flat pour estimates.
Place expansion joints every 10 feet and at any junction where the curb meets a driveway, sidewalk, or structure. Skipping joints guarantees cracking.
Use a string line or laser level to keep the curb straight and at consistent height. Even small wobbles look obvious once the concrete cures.
For DIY mow strips, a 4-inch wide by 4-inch tall curb is enough to separate lawn from beds. Barrier curbs for parking lots need 6 to 8 inches tall.
Need to estimate the full driveway alongside your curb? Our concrete cost calculator breaks down material, labor, and finishing costs.
Curb extrusion machines can be rented for $200 to $400 per day. They form and pour in one pass, which saves labor on runs over 100 linear feet.
Wet-cure curbs for at least 5 to 7 days. Curbs have a high surface-to-volume ratio, so they dry out and crack faster than slabs if left uncovered.
Enter the total curb length, cross-section height and width, curb type, and waste factor.
The calculator multiplies the cross-section area (height x width) by the curb length to get total volume, then applies the waste factor.
Get cubic yards, 80lb bag count, total weight, and installed cost range based on curb type.
Formulas
Cross-Section = Height x Width (in square inches)
Volume = Length x (Cross-Section / 144) (in cubic feet)
Cubic Yards = Cubic Feet / 27
Bags (80lb) = Cubic Feet / 0.6
How much does a concrete curb cost per foot?
Concrete curbs cost $6 to $22 per linear foot depending on the style. Rolled/extruded curbs run $6 to $12. Straight vertical curbs run $8 to $15. Barrier curbs for commercial parking cost $12 to $22 per foot.
How deep should a concrete curb be?
Residential curbs are typically 6 inches tall and 6 inches wide. The footing below grade should extend at least 4 inches into compacted gravel. Barrier curbs for commercial use are 8 to 12 inches tall.
Do concrete curbs need reinforcement?
Short residential curbs under 50 feet usually do not need rebar. For longer runs, place a single #4 rebar horizontally through the center. Barrier curbs and commercial curbs should have rebar on 24-inch centers.
Do I need a permit to pour a curb?
Most cities require a permit for curbs along public streets or that affect drainage. Curbs entirely on your property (garden borders, mow strips) typically do not require permits. Check with your local building department.
How much does it cost to rent a curb machine?
Curb extrusion machines rent for $200 to $400 per day. They work best for rolled and extruded profiles on runs over 100 feet. For short runs or straight curbs, manual forms are cheaper.
What is the difference between a curb and edging?
Curbs are structural concrete borders typically 6 inches or taller that define roadways, driveways, and parking areas. Edging is thinner (2 to 4 inches), often decorative, and used to separate landscaping beds from lawn.
Are concrete mow strips the same as curbs?
Mow strips are a type of low-profile curb, usually 4 inches wide and flush with the ground or slightly raised. They create a clean edge for mowing between lawn and garden beds without trimming.
How long does a concrete curb take to cure?
Concrete curbs can handle foot traffic after 24 to 48 hours. Wait 7 days before driving over mountable curbs. Full cure takes 28 days. Keep the surface moist with a curing compound or plastic sheeting for at least 5 days.
Standard driveway edging. Budget $400 to $750 installed. DIY with forms saves about 60%.
Long property border. Rent a curb machine for this length. Budget $1,200 to $2,400 installed.
Commercial barrier curb. Requires rebar and professional installation. Budget $6,000 to $11,000.
Low-profile landscape border. Easy weekend DIY project. Budget $480 to $960 installed or under $100 in materials.
Making the curb too thin
A curb under 4 inches wide will crack from lateral pressure within months. Standard residential curbs should be at least 6 inches wide for durability.
Skipping expansion joints
Concrete expands and contracts with temperature. Without joints every 10 feet, long curb runs will develop random cracks that look sloppy and let water infiltrate.
Pouring on bare soil
Curbs poured directly on dirt settle unevenly as the soil compacts. Always prepare a 4-inch compacted gravel base for proper drainage and stability.
Removing forms too early
Wait at least 24 hours before pulling forms. Removing them while the concrete is still green causes edges to crumble and corners to chip.
Not compacting the base
Loose gravel under a curb will shift and settle. Use a plate compactor or hand tamper to compact the base in 2-inch lifts before setting forms.
Important Disclaimer
These estimates are for planning purposes only. Actual costs vary by location, material availability, and project complexity. Always get at least 3 local quotes. This calculator does not replace professional advice.