Concrete cost, quantity & repair calculators
Free, no-signup concrete calculators for homeowners, DIYers and small contractors planning concrete flatwork — volume & material, driveways, patios & slabs, stamped & decorative, sidewalks & steps, and repair & leveling. Every tool works on the quantities you measure and the prices you enter from your own quotes, and shows its formula, a worked example and a reference table so you can sanity-check a concrete contractor’s quote.
Volume & Material
The deterministic anchor: a concrete calculator (slab volume → cubic yards + bags), a concrete slab calculator, a bags-of-concrete calculator (40/60/80 lb), a ready-mix vs bags compare, a concrete cost-per-yard estimator, a rebar calculator (linear ft by grid spacing), a gravel / sub-base calculator (yd³ + tons), a sonotube / column / footing volume calculator, and a concrete block / wall count calculator.
All Volume & Material tools →Driveways
Budget the pour: concrete driveway cost, cement driveway cost, driveway cost per sq ft, a gravel base for driveway calculator, driveway removal & replacement cost, and a driveway thickness & rebar reference. Enter the prices from your own quotes.
All Driveways tools →Patios & Slabs
Price the flatwork: concrete patio cost, concrete slab cost, garage / shed slab cost, a slab-on-grade thickness reference, and patio cost per sq ft — area × your $/sq ft + sub-base + rebar, with contingency.
All Patios & Slabs tools →Stamped & Decorative
The finished look: stamped concrete cost, decorative / colored concrete cost, exposed-aggregate concrete cost, a concrete sealer coverage calculator (gallons by area × coats), and a stamped vs plain compare.
All Stamped & Decorative tools →Sidewalks, Steps & Walkways
Flatwork and access: concrete sidewalk cost, walkway cost, concrete steps cost & volume (riser/tread prisms → yd³ + bags), curb & gutter cost, and a sidewalk / flatwork repair cost with a mud-jack vs replace compare.
All Sidewalks, Steps & Walkways tools →Repair & Leveling
Fix and lift: mudjacking / slabjacking cost, concrete leveling cost (foam vs mud), concrete crack repair cost (cosmetic surface flatwork), concrete resurfacing cost, concrete removal / demolition cost, and a foam vs mud jacking compare.
All Repair & Leveling tools →Volume & Material
Driveways
Patios & Slabs
Stamped & Decorative
Sidewalks, Steps & Walkways
Repair & Leveling
Built for the whole concrete project — and to stay correct forever
CementCalcs gathers the calculations homeowners, DIYers and small contractors reach for when concrete is going in — how much concrete to order, what a driveway, patio, slab or sidewalk costs, how many bags or how much rebar and gravel base, and what leveling or repair runs — volume/material → driveway → patio/slab → stamped/decorative → sidewalk/steps → repair/leveling, in one focused hub, in US units, without signup, with transparent formulas. Every tool shows not just the answer but the underlying formula, a worked example and a reference table, so you can sanity-check a concrete contractor’s quote.
Because the tools rest on timeless concrete math (volume cu ft = area × (thickness ÷ 12); cubic yards = cu ft ÷ 27; bags = ceil(cu ft ÷ bag yield); ready-mix cost = yd³ × your $/yd³ + delivery; slab/driveway cost = area × your $/sq ft + sub-base + rebar + add-ons − discount, ×(1 + contingency); rebar linear ft from grid spacing; gravel = area × depth ÷ 27 ×(1 + compaction), tons = yd³ × 1.4; tube = π·r²·h; steps = Σ riser/tread prisms) and stable conventions (1 yd³ = 27 ft³; a 40 lb bag ≈ 0.30, a 60 lb ≈ 0.45, an 80 lb ≈ 0.60 ft³; slab thickness bands; rebar spacing 12–18" o.c.; waste ~5–10%), they stay correct with no maintenance — no ready-mix or labor price list, no regional cost index, no product catalog, no contractor directory. Cost tools use the prices you enter from your own quotes and bills; labeled cost bands are only a sanity guide. More at Sources & formulas, Methodology and About.
Estimates, not bids. Every result is a planning estimate from your own prices, or a material-quantity guide, not a bid, a pour procedure, or structural, geotechnical or safety advice — get itemized written quotes from licensed, insured concrete contractors, and defer load-bearing footing, slab and rebar design to a licensed engineer. Confirm yield against your product’s bag/spec sheet and order a little extra (5–10%) for spillage and uneven subgrade; bag yields, coverage, thickness, rebar spacing, sub-base depth and cost bands are labeled industry planning typicals.