North CarolinaConcrete Calculator — Yards, Bags & Cost
Calculate cubic yards, bags needed, and NC-accurate ready-mix costs for any North Carolina concrete project — driveways, patios, foundations, pool decks & more.
$148
Avg NC Ready-Mix (per Cu Yd)
3,000
Min PSI — NC Residential Flatwork
18 in
Max Frost Depth (Western NC)
NCBC
NC Building Code Compliant
🚗 Driveway🏡 Patio / Deck🏗️ Foundation🪨 Footings🏊 Pool Deck🛤️ Sidewalk
The North Carolina Concrete Calculator helps homeowners, contractors, and builders estimate cubic yards, bag count, and ready-mix costs for any concrete project in North Carolina. NC pricing runs $130–$175/yd — close to the national average — with notable differences between the mountains (Asheville), Piedmont (Charlotte, Raleigh, Durham), and coastal plain (Wilmington). Enter your dimensions and get instant, NC-accurate results.
🌲 North Carolina Concrete Calculator
🌲 NC-Accurate Pricing · NCBC Compliant · North Carolina State
🪨 4 in. Compacted Gravel / Crushed Stone Base (NC Standard)
Compacted Subgrade / Native NC Soil
27
Cu ft per cubic yard
45
80 lb bags per cu yd
$148
Avg NC ready-mix / yd
Concrete SlabRebar LayerGravel BaseSubgrade
North Carolina Concrete Calculator — What You Need to Know
North Carolina spans three distinct regions that each affect concrete work differently. The mountain region (Asheville, Boone, Brevard) experiences freeze-thaw cycles requiring air-entrained mixes. The Piedmont Triad (Charlotte, Raleigh, Greensboro, Durham) is the most active construction zone with the most competitive ready-mix pricing. The coastal plain and Outer Banks (Wilmington, New Bern) require corrosion-resistant mixes due to high humidity and salt air exposure.
🔵 NCBC Minimum Concrete Requirements
Residential flatwork: 3,000 PSI min · Driveways & exposed slabs: 3,500 PSI · Western NC freeze-thaw: 4,000 PSI + air entrainment 3.5–6% · Coastal / salt exposure: 4,500 PSI, low W/C ratio. Verify requirements with the NC Office of State Fire Marshal & Engineering.
🚗 NC Residential Driveway
A standard 10×20 ft driveway at 6 in. needs ~3.7 cubic yards. At NC pricing ($143–$165/yd for 3,500 PSI), material costs run $529–$611. Western NC mountain driveways should specify 4,000 PSI air-entrained mix for winter durability.
🏊 NC Pool Deck
Pool decks are hugely popular in NC's warm climate. A 500 sq ft surround at 4 in. needs ~6.2 cubic yards. Use a brushed or exposed aggregate finish. Coastal NC pools need 4,500 PSI mix with corrosion inhibitor to resist salt air.
🏗️ NC Foundation / Crawl Space
NC homes commonly use crawl space foundations with concrete footings and stem walls. A typical 1,500 sq ft home needs 8–14 cubic yards for footings. NCBC requires licensed contractor and permit for all foundation concrete work.
How to Calculate Concrete Volume — North Carolina
Break your NC project into simple rectangular, circular, or L-shaped sections. Calculate cubic feet first, then divide by 27 to get cubic yards. North Carolina's clay-heavy Piedmont soils can cause settling — always compact your sub-base thoroughly and add at least 4 in. of compacted gravel before pouring.
Example: 20 ft × 10 ft NC driveway × 6 in = 100 cu ft = 3.70 cu yd → Order 4.1 cu yd
⚠️ NC Clay Soil Warning — Sub-Base Is Critical
Much of the NC Piedmont has expansive red clay soil (Carolina red clay) that swells when wet and shrinks when dry. Without a proper compacted gravel base of at least 4 in., concrete slabs will crack or heave. Request a soil compaction test before pouring any slab larger than 100 sq ft in Charlotte, Raleigh, or Greensboro.
North Carolina Concrete Calculator — Pricing Reference
North Carolina ready-mix concrete is priced near the national average. Charlotte and Raleigh metro areas have the most suppliers and best pricing. Asheville runs 8–12% higher due to mountain access. Coastal NC (Wilmington, OBX) adds $10–$20/yd for delivery distance. Compare with the Alabama Concrete Calculator for Southeast regional pricing.
Mix Type / PSI
NC Price / Cu Yd
National Avg
Best For
Air Entrained?
NC Region
3,000 PSI — Standard
$130–$155
$130–$150
Interior slabs, protected patios
Optional
Coastal / Piedmont
3,500 PSI — Residential
$138–$162
$138–$158
Driveways, garage floors
Recommended
Piedmont Standard
4,000 PSI — NC Mountain
$148–$172
$145–$165
Asheville, Boone, mountain work
Required W. NC
Recommended
4,500 PSI — Coastal / Structural
$158–$185
$155–$175
Foundations, coastal exposure
Required W. NC
Compliant
5,000 PSI — High Strength
$168–$198
$163–$185
Commercial / heavy structural
Required
Compliant
Fiber / Stamped Decorative
$178–$230
$155–$210
Patios, pool decks, decorative NC
Required W. NC
Compliant
3,000 PSI — Standard
NC Price / Cu Yd$130–$155
National Avg$130–$150
Best ForInterior / protected slabs
3,500 PSI — Residential
NC Price / Cu Yd$138–$162
National Avg$138–$158
Best ForDriveways, garage floors
4,000 PSI — NC Mountain
NC Price / Cu Yd$148–$172
National Avg$145–$165
Best ForAsheville, Boone, mountain work
4,500 PSI — Coastal / Structural
NC Price / Cu Yd$158–$185
National Avg$155–$175
Best ForFoundations, coastal exposure
5,000 PSI — High Strength
NC Price / Cu Yd$168–$198
National Avg$163–$185
Best ForCommercial / heavy structural
North Carolina Concrete Project Tips
Piedmont red clay requires extra base prep — Always install a minimum 4 in. compacted gravel base over NC clay. Skipping this step is the #1 cause of cracked driveways and patios in Charlotte and Raleigh.
Western NC: specify air-entrained mix — Asheville, Boone, and Brevard see 50–80 freeze-thaw cycles per year. Use 4,000 PSI with 3.5–6% air entrainment for all outdoor flatwork.
Coastal NC: use corrosion-resistant mix — Salt air from the Atlantic accelerates rebar corrosion. Specify 4,500 PSI with low W/C ratio (≤ 0.45) and epoxy-coated rebar for Wilmington and Outer Banks projects.
Order 10% overage minimum — NC short-load fees of $100–$200 apply for orders under 3–5 cubic yards. It's always cheaper to have a little extra than to order a second truck.
Permit required for structural work — All foundations, footings, retaining walls, and structural slabs require a building permit from your local NC county. Check with the NC Office of State Fire Marshal.
Pour in mild weather — NC summer temps above 90°F (common in Charlotte and Raleigh July–August) accelerate set time. Pour early morning and wet-cure for at least 7 days to prevent surface cracking.
✅ Charlotte vs. Asheville vs. Wilmington — Pricing Snapshot
Charlotte metro is the most competitive in NC at $130–$158/yd with multiple Cemex, Vulcan, and Martin Marietta plants. Asheville runs $148–$175/yd due to mountain terrain. Wilmington and coastal NC average $140–$170/yd with potential delivery surcharges for beach or barrier island sites.
North Carolina Concrete Calculator — Frequently Asked Questions
How much does concrete cost per yard in North Carolina?+
$130–$175 per cubic yard for standard 3,000–4,000 PSI ready-mix in NC. Charlotte and Raleigh are the most affordable at $130–$158/yd. Asheville runs $148–$175/yd and coastal NC adds $10–$20/yd for delivery to remote sites.
Do I need a permit for concrete work in North Carolina?+
Yes for structural work. NC building permits are required for foundations, footings, and retaining walls. Simple patios and walkways on private property typically do not require a permit — confirm with your local county building department.
What PSI concrete should I use in North Carolina?+
3,000–3,500 PSI for most Piedmont and coastal NC residential work. 4,000 PSI with air entrainment for western NC mountains (Asheville, Boone). 4,500 PSI for coastal salt-air exposure and structural foundations.
How many cubic yards for a NC driveway?+
A standard 10×20 ft driveway at 6 in. needs ~4.1 cubic yards including 10% waste. At NC pricing of $138–$162/yd, material alone costs $566–$664. Total installed cost including labor runs $1,800–$3,500 in most NC cities.
Does red clay soil in NC affect concrete?+
Yes — significantly. NC's Piedmont red clay expands when wet and contracts when dry, causing slab movement and cracking. Always install a 4 in. compacted gravel base over clay soil and consider fiber-reinforced concrete for driveways and patios in Charlotte or Raleigh.
Who supplies ready-mix concrete in North Carolina?+
Major NC suppliers include Cemex, Martin Marietta, Vulcan Materials, and Barnhill Contracting. Charlotte and Raleigh have the most plants. Schedule 24–48 hrs in advance and request a batch ticket confirming PSI, slump, and air content for every structural pour.
How long does concrete cure in North Carolina?+
24 hrs foot traffic · 7 days light vehicles · 28 days full strength. In NC summer heat (above 90°F), keep concrete moist for 7 days using wet burlap or a curing compound to prevent surface cracking and dusting.
NCBC, NCDOT, and industry references for compliant concrete work in North Carolina.
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NC Office of State Fire Marshal
Code & Permits
Access the North Carolina Building Code, apply for structural permits, and find licensed contractors for compliant concrete work across all NC counties.
Access NCDOT standard specifications for concrete construction, driveway access permits, and road-adjacent concrete work standards across North Carolina.