The Rhode Island Concrete Calculator helps homeowners, contractors, and builders estimate cubic yards, bag count, and ready-mix costs for any concrete project across the Ocean State. RI pricing runs $148–$185/yd — well above the national average — reflecting New England's high labor rates, limited batch plant competition, and coastal material delivery costs. Rhode Island's harsh winters, 40–60 annual freeze-thaw cycles, up to 48 in. frost depth, and extensive Atlantic coastline create unique demands: air-entrained 4,000 PSI mixes statewide, plus chloride-resistant specifications for coastal projects in Newport, Narragansett, and South County. Enter your dimensions and get instant, RI-accurate results.
⚓ Rhode Island Concrete Calculator
⚓ RI-Accurate Pricing · RISBC Compliant · Rhode Island State
Enter project dimensions to calculate volume, bags, and estimated Rhode Island material cost.
RI State Building Code requires permits for structural concrete. Contact your local RI city or town building department before starting any structural pour.
Patio 4 in · Driveway 6 in · Garage 4–6 in · Foundation 8–12 in · Coastal slab 6–8 in
Cubic Yards Required
—
Including waste factor
📋 Project Summary
💵 RI Cost Estimate
📐 Rhode Island Slab Cross-Section — RISBC Cold-Climate / Coastal Standard
Broom / Brushed Finish — Rhode Island Standard
Concrete — 4–6 in. (RISBC Residential) 4,000 PSI · Air-Entrained 5–7% · W/C Ratio ≤ 0.45 · Low-Chloride Coastal
⬛ Rebar / Wire Mesh — Driveways, Foundations, All Structural Work
🪨 4–6 in. Compacted Gravel / Crushed Stone Base (RI Drainage Standard)
Compacted Subgrade — Below 36–48 in. Frost Line (RI Code)
27
Cu ft per cubic yard
45
80 lb bags per cu yd
$162
Avg RI ready-mix / yd
Concrete SlabRebar LayerGravel BaseSubgrade
Rhode Island Concrete Calculator — What You Need to Know
Rhode Island is New England's smallest state but has some of its most demanding concrete conditions. The state experiences 40–60 freeze-thaw cycles per year with frost depths ranging from 36 in. in southern coastal communities (Newport, Narragansett) up to 48 inches in northern RI (Woonsocket, Cumberland). The Rhode Island State Building Code (RISBC) adopts the International Building Code (IBC) and International Residential Code (IRC) with state amendments, requiring 4,000 PSI air-entrained concrete for all outdoor flatwork statewide. Rhode Island's 400-mile coastline creates an additional challenge: salt air and marine spray demand chloride-resistant mix designs and epoxy-coated rebar for any slab within a mile of Narragansett Bay or the Atlantic Coast.
🔵 RI State Building Code Minimum Concrete Requirements
All outdoor flatwork: 4,000 PSI + 5–7% air entrainment · Coastal / marine exposure: 4,500 PSI, W/C ≤ 0.40, low-chloride mix, epoxy-coated rebar · Foundations: footings below frost line (36–48 in.) · W/C ratio: max 0.45 for weather-exposed concrete. Verify with the RI Division of Building, Design & Fire Professionals.
🚗 Rhode Island Driveway
A standard 10×20 ft driveway at 6 in. needs ~4.1 cubic yards. At RI pricing ($155–$175/yd for 4,000 PSI), material costs $636–$718. Rhode Island driveways near the coast need 4,500 PSI with low-chloride mix to resist salt air and road salt spray. Apply a penetrating sealer every 2–3 years statewide.
⚓ Coastal Slab / Seawall Base
Rhode Island's Narragansett Bay and Atlantic coastal properties demand 4,500–5,000 PSI low-chloride concrete with epoxy-coated rebar and W/C ≤ 0.40. A standard 12×16 ft coastal patio at 6 in. needs ~3.6 cubic yards. Coastal permits in RI require CRMC (Coastal Resources Management Council) approval in addition to local building permits.
🏗️ RI Foundation / Full Basement
Rhode Island's deep frost depths (36–48 in.) mean nearly all homes use full basements. A 1,200 sq ft house foundation needs 20–32 cubic yards for footings, walls, and floor. The RISBC requires footings below the local frost depth, licensed contractor, and building permit for all structural foundation work in every RI city and town.
How to Calculate Concrete Volume — Rhode Island
Multiply length × width × (depth in inches ÷ 12) to get cubic feet, then divide by 27 for cubic yards. For Rhode Island basement foundations, calculate footings and walls separately, then add the slab floor volume. Always include at least a 10% waste factor — Rhode Island short-load fees of $150–$250 are among the highest in New England at most Providence and coastal RI suppliers, making over-ordering consistently the smarter and cheaper choice.
Example: 20 ft × 10 ft RI driveway × 6 in = 100 cu ft = 3.70 cu yd → Order 4.1 cu yd
⚠️ Rhode Island Coastal Salt Air & Freeze-Thaw Warning
Rhode Island's Atlantic coastline from Watch Hill to Newport subjects concrete to salt air, marine spray, and wave splash year-round. Standard 4,000 PSI air-entrained mix is insufficient within approximately 1 mile of the coast — specify 4,500–5,000 PSI, W/C ≤ 0.40, low-chloride mix with a maximum 0.15 lb/yd³ chloride content, and epoxy-coated or stainless rebar for all coastal flatwork and structural concrete. Coastal CRMC permits are required in addition to local RI building permits for any project near the shoreline, Narragansett Bay, or tidal wetlands.
Rhode Island Concrete Calculator — Pricing Reference
Rhode Island ready-mix pricing is among the highest in New England due to the state's small size limiting batch plant competition, high union labor rates, New England aggregate costs, and tight delivery windows from the few Providence-area and South County plants. Compare with the Connecticut Concrete Calculator and Massachusetts Concrete Calculator for neighboring New England state pricing.
Mix Type / PSI
RI Price / Cu Yd
National Avg
Best For
Air Entrained?
RI Code
3,000 PSI — Interior Only
$148–$165
$130–$150
Interior slabs, basement floors
Not Outdoor
Interior Only
3,500 PSI — Protected
$154–$170
$138–$158
Covered patio, fully protected garage
Recommended
Limited Use
4,000 PSI — RI Standard
$162–$182
$145–$165
Driveways, sidewalks, patios, garage
Required
Compliant
4,500 PSI — Coastal / Structural
$172–$196
$155–$175
Coastal slabs, foundations, heavy exposure
Required
Compliant
5,000 PSI — Marine / High Strength
$185–$218
$163–$185
Marine, seawall base, commercial structural
Required
Compliant
Fiber / Stamped Decorative
$192–$248
$155–$210
Newport / Providence patios, decorative RI
Required
Compliant
3,000 PSI — Interior Only
RI Price / Cu Yd$148–$165
National Avg$130–$150
Best ForInterior / basement slabs only
3,500 PSI — Protected
RI Price / Cu Yd$154–$170
National Avg$138–$158
Best ForCovered patio, fully protected garage
4,000 PSI — RI Standard
RI Price / Cu Yd$162–$182
National Avg$145–$165
Best ForDriveways, sidewalks, patios
4,500 PSI — Coastal / Structural
RI Price / Cu Yd$172–$196
National Avg$155–$175
Best ForCoastal slabs, foundations, heavy exposure
5,000 PSI — Marine / High Strength
RI Price / Cu Yd$185–$218
National Avg$163–$185
Best ForMarine, seawall, commercial structural
Rhode Island Concrete Project Tips
Always use 4,000 PSI air-entrained mix outdoors — Rhode Island's 40–60 annual freeze-thaw cycles make this mandatory for every driveway, sidewalk, patio, and exposed slab statewide, from Woonsocket to Westerly. No exceptions for outdoor work.
Coastal projects need 4,500 PSI low-chloride mix — Any concrete within approximately 1 mile of Narragansett Bay, the Atlantic Coast, or tidal water in RI requires 4,500 PSI with W/C ≤ 0.40, low-chloride admixtures, and epoxy-coated rebar to resist marine salt corrosion.
Footings must go 36–48 in. below grade — Rhode Island frost depth is among New England's most demanding. Northern RI (Woonsocket, Cumberland, North Providence) requires footings 48 in. deep. Southern coastal RI requires 36 in. Confirm your exact town or city requirement with your local RI building department.
Seal all flatwork every 2–3 years — Road salt from October through April combined with coastal salt air makes sealing critical across all of Rhode Island. Apply a penetrating silane/siloxane sealer after the 28-day cure and reseal every 2–3 years to prevent surface scaling and delamination.
CRMC permit required for coastal projects — Any concrete project near the shoreline, coastal wetlands, or Narragansett Bay in RI requires a Rhode Island Coastal Resources Management Council (CRMC) assent or permit in addition to local building permits. Allow 4–12 weeks for CRMC review on new construction.
Add control joints every 8–10 ft statewide — Rhode Island's temperature range (-10°F in Providence to 95°F in summer) causes significant slab expansion and contraction. Cut or tool control joints every 8–10 ft in all flatwork to control cracking from thermal cycling.
Order 10–15% extra in RI — Rhode Island's limited batch plants mean short-load fees of $150–$250 are common for orders under 3–5 cubic yards. On cold New England days, waiting for a second truck risks cold joints. Always over-order slightly.
✅ Providence vs. Newport vs. Woonsocket — Pricing Snapshot
Providence metro is Rhode Island's best-priced market at $155–$178/yd, with the most batch plant options and competitive same-day scheduling. Newport and Aquidneck Island run $162–$190/yd due to bridge access logistics and coastal area demand. Woonsocket and northern RI average $158–$185/yd. South County and Westerly (coastal communities) command $168–$210/yd for coastal-spec 4,500 PSI mixes with low-chloride admixtures.
Rhode Island Concrete Calculator — Frequently Asked Questions
How much does concrete cost per yard in Rhode Island?+
$148–$185 per cubic yard for standard ready-mix in Rhode Island. Providence metro is most affordable at $155–$178/yd. Newport and coastal RI run $162–$196/yd for 4,500 PSI coastal-spec mixes. Short-load fees of $150–$250 apply for orders under 3–5 cubic yards at most RI plants.
What PSI concrete is required in Rhode Island?+
4,000 PSI with 5–7% air entrainment for all outdoor flatwork statewide — driveways, sidewalks, patios, and garage floors. 4,500 PSI with W/C ≤ 0.40 for coastal projects near Narragansett Bay or the Atlantic Coast. Interior basement slabs may use 3,000–3,500 PSI.
How deep must footings be in Rhode Island?+
36 inches minimum in southern and coastal RI (Newport, Narragansett, Westerly) and up to 48 inches in northern RI (Woonsocket, Cumberland, North Smithfield). Always confirm your exact local frost depth requirement with your RI city or town building department before digging.
Do I need a CRMC permit for coastal concrete in Rhode Island?+
Yes for most coastal projects. The Rhode Island Coastal Resources Management Council (CRMC) requires assent or permit approval for concrete work near the shoreline, coastal wetlands, beaches, and Narragansett Bay. Allow 4–12 weeks for CRMC review. Local building permits are also required separately through your city or town.
How many cubic yards for a Rhode Island driveway?+
A standard 10×20 ft RI driveway at 6 in. needs ~4.1 cubic yards with 10% waste. At RI pricing of $162–$182/yd, material costs $664–$746. Total installed cost including labor typically runs $2,200–$4,000 in the Providence and Newport metro areas.
Who supplies ready-mix concrete in Rhode Island?+
Major Rhode Island suppliers include Oldcastle Materials (CRH), Valley Resources, Tilcon Rhode Island, and several independent Providence-area and South County batch plants. Rhode Island has fewer competing plants than neighboring Massachusetts — schedule at least 24–48 hrs in advance and always confirm your batch ticket for PSI, air content, W/C ratio, and slump before accepting delivery.
How long does concrete cure in Rhode Island?+
24 hrs foot traffic · 7 days light vehicles · 28 days full design strength. In Rhode Island winters (below 40°F), use insulated curing blankets for the first 72 hours. In RI summers, moist-cure with burlap or curing compound for 7 days. Coastal projects benefit from extended 14-day moist curing to maximize chloride resistance.
RISBC, CRMC, RIDOT, and industry references for compliant concrete work across the Ocean State.
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RI Div. of Building, Design & Fire Professionals
RI State Building Code
Access Rhode Island State Building Code (RISBC) requirements, find licensed RI contractors, verify permit requirements for structural concrete, foundations, and outdoor flatwork, and access IBC/IRC provisions adopted by Rhode Island statewide.
Apply for CRMC assent for coastal concrete projects near Narragansett Bay, the Atlantic Coast, beaches, and tidal wetlands. Required for any structural concrete work in Rhode Island's coastal zone, including seawall bases, coastal slabs, and shoreline foundations.
Find NRMCA-certified ready-mix producers in Rhode Island, access ACI 318 cold-weather and marine exposure concrete guides, and get expert mix design recommendations for RI's freeze-thaw climate and demanding coastal environment.