80+ Free Concrete
Calculators. Every Type.
Every concrete tool you need — organized by project type. Slabs, footings, mix design, rebar, cost estimation, materials, and more. Built against ACI, ASTM, and ASCE standards. Free, forever, no sign-up required.
Flatwork & Slabs
Calculate concrete volume for any horizontal pour — driveways, patios, garage floors, walkways, pool decks, and specialty stamped or resurfaced surfaces.
Concrete Slab Calculator
Calculate cubic yards, cubic feet, and bag count for any rectangular or square slab. Includes 5–10% overage option.
Concrete Driveway Calculator
Estimate concrete for single or double driveways. Accounts for standard 4″ and 6″ thickness and curved apron areas.
Concrete Patio Calculator
Volume and bag estimation for rectangular, L-shaped, and irregular patio footprints with optional edge thickness.
Walkway & Sidewalk Calculator
Calculate concrete volume for straight or multi-section walkways and sidewalks, including ADA-compliant 4″ thickness guidance.
Garage Floor Calculator
1-car, 2-car, or custom garage floor volume with standard 4″ and 6″ slab options and waste percentage toggle.
Shed & Equipment Pad Calculator
Quick volume estimation for shed bases, HVAC pads, generator pads, and small equipment foundations.
Pool Deck Calculator
Calculate concrete for rectangular or free-form pool decks. Subtracts pool footprint to isolate deck area only.
Stamped Concrete Calculator
Estimate volume and cost for stamped decorative concrete, including pattern sealers and base slab depth recommendations.
Concrete Resurfacing Calculator
Calculate resurfacing compound coverage for overlay thickness from ⅛″ to 2″ on existing slabs and driveways.
Floor Leveling Calculator
Estimate self-leveling compound or topping mix volume needed to correct uneven or sloped interior concrete floors.
Foundations & Footings
Size and calculate concrete for any below-grade structural element — strip footings, column piers, post holes, sonotubes, retaining walls, basement slabs, and piles.
Concrete Footing Calculator
Calculate cubic yards for continuous strip footings. Input width, depth, and total linear footage — results include bag count.
Column & Pier Calculator
Volume for round or square concrete columns and piers. Handles single or multiple piers with depth and diameter inputs.
Tube / Sonotube Calculator
Concrete volume for cylindrical tube form footings. Accounts for diameter, depth, and bell-bottom flare if applicable.
Post Hole Concrete Calculator
Bags needed for deck posts, fence posts, and mailbox footings. Supports multiple holes at once with post diameter subtraction.
Foundation Wall Calculator
Concrete volume for poured-in-place foundation walls. Input total linear footage, wall height, and thickness to get cubic yards.
Basement Slab Calculator
Volume for below-grade basement floor slabs, including standard 4″ thickness and optional vapor barrier notes.
Retaining Wall Calculator
Poured concrete retaining wall volume, including base footing and stem wall dimensions. Supports battered and vertical wall profiles.
Stem Wall Calculator
Volume for perimeter stem walls on raised floor systems. Includes separate footing and stem wall section inputs.
Frost Depth & Footing Depth Calculator
Estimate minimum footing depth based on geographic frost depth data. Cross-referenced with IRC and ASCE 7 climate zone tables.
Concrete Pile Calculator
Volume and mix quantity for cast-in-place concrete piles. Supports cylindrical, square, and H-pile configurations.
Site Work & Specialty Structures
Concrete estimation for infrastructure and specialty applications — steps, curbs, gutters, ADA ramps, drainage channels, cisterns, and septic tanks.
Step & Staircase Calculator
Concrete volume for exterior stairs. Input number of steps, rise, run, and width. Accounts for solid versus hollow-core step designs.
Curb & Gutter Calculator
Volume for standard barrier curb, rolled curb, and combined curb-and-gutter profiles. Input linear footage and curb profile dimensions.
Driveway Apron Calculator
Estimate concrete for the transition section between street and driveway, including tapered apron shapes and standard city dimensions.
Median & Traffic Island Calculator
Concrete volume for raised medians and traffic islands. Supports rectangular, tapered, and custom profile shapes.
ADA Ramp Calculator
Volume and dimensional compliance check for ADA-compliant concrete ramps. Flags slope violations against ADA 2010 Standards.
Drainage Channel Calculator
Concrete volume for U-shaped and V-shaped drainage channels and swales. Includes wall and base thickness inputs.
Cistern & Tank Wall Calculator
Wall volume for cast-in-place concrete cisterns and tanks. Handles rectangular and cylindrical tank geometries.
Septic Tank Calculator
Concrete volume for residential and commercial cast-in-place septic tanks, including walls, base slab, and top slab sections.
Volume, Conversion & Logistics
Unit conversions, bag-to-yard equivalents, truck load planning, short-load fees, and weight calculations — everything you need to order the right amount.
Concrete Bags Calculator
Convert cubic yards to bag count for 40 lb, 60 lb, and 80 lb bags. Supports Quikrete, Sakrete, and generic mix densities.
Cubic Yards to Bags Converter
Instantly convert any volume in cubic yards to the number of premixed bags needed, with side-by-side comparison across bag sizes.
Bags to Cubic Yards Converter
Enter your bag count and bag size to see the total cubic yards of concrete you'll produce — useful when working from existing inventory.
Cubic Feet to Cubic Yards Converter
Clean, fast conversion between cubic feet and cubic yards. No rounding errors — precise to three decimal places.
Concrete Truck Load Calculator
Determine how many full and partial ready-mix truck loads your project requires, based on standard 8–10 cy drum capacity.
Short Load Fee Estimator
Estimate short-load surcharge cost when ordering less than a full ready-mix truck. Helps weigh bagged vs. ready-mix tradeoffs.
Concrete Weight Calculator
Convert concrete volume to weight (lbs or kg). Uses standard wet and cured density values with lightweight aggregate option.
Concrete Coverage Calculator
Calculate how many square feet a given volume will cover at a specified thickness. Works for slabs, overlays, and topping mixes.
Concrete Mix Design
Design and proportion concrete mixes — water-cement ratio, cement quantity, admixture dosage, pigments, fiber reinforcement, and air entrainment. Referenced to ACI 211.
Concrete Mix Ratio Calculator
Calculate cement, sand, and aggregate proportions for common mix ratios (1:2:3, 1:1.5:3, custom). Outputs quantities by weight and volume.
Water-Cement Ratio Calculator
Determine the correct W/C ratio for target compressive strength. Referenced to ACI 211.1 — includes durability exposure class guidance.
Cement Quantity Calculator
Calculate bags of Portland cement needed for a given volume and mix design. Supports Type I, II, III, and blended cements.
Concrete Batch Calculator
Scale a mix design up or down for any batch size. Enter target volume and mix proportions — outputs absolute quantities per batch.
Admixture Dosage Calculator
Calculate admixture quantities (accelerators, retarders, plasticizers, WRAs) by oz/cwt dosage rate for any batch size.
Pigment & Color Calculator
Dosage calculator for integral concrete pigments (iron oxide). Input target color depth (1%–10% by cement weight) for precise batch amounts.
Fiber Reinforcement Calculator
Calculate polypropylene or steel fiber dosage by weight per cubic yard for crack control and secondary reinforcement applications.
Air Entrainment Calculator
Determine target air content percentage by exposure class and maximum aggregate size, per ACI 318 Table 26.4.3.1.
Structural, Reinforcement & Engineering
Rebar sizing and spacing, wire mesh quantities, slab thickness selection, load capacity, beam design, deflection, strength conversion, and curing time — all referenced to ACI 318.
Rebar Calculator
Estimate rebar quantity and weight for slabs, walls, and footings. Input slab dimensions, bar size, and spacing — outputs linear feet and lbs.
Rebar Spacing Calculator
Calculate rebar spacing and bar count for a given slab or wall dimension. Supports on-center spacing and ACI 318 maximum spacing checks.
Wire Mesh / WWF Calculator
Calculate sheets or rolls of welded wire fabric needed for slabs and walls. Includes 10% lap waste factor and common WWF designations.
Slab Thickness Selector
Get recommended slab thickness based on use (foot traffic, vehicles, heavy equipment) and subbase conditions. Referenced to ACI 360.
Load Capacity Calculator
Estimate allowable uniform and point loads for concrete slabs on grade based on slab thickness, subgrade k-value, and compressive strength.
Concrete Beam Calculator
Moment capacity and volume estimation for rectangular reinforced concrete beams. References ACI 318 strength reduction factors.
Compressive Strength Converter
Convert between PSI, MPa, kPa, and kgf/cm² for concrete compressive strength values. Instant, precise, no rounding.
PSI to MPa Converter
Dedicated PSI ↔ MPa converter for concrete strength. Includes a quick-reference table of common design strengths in both units.
Slab Deflection Calculator
Estimate midspan deflection for simply-supported and continuous slabs under uniform load. Checks against ACI L/360 and L/240 limits.
Anchor Bolt & Embed Plate Calculator
Embedment depth and edge distance check for cast-in-place anchor bolts and embed plates per ACI 318 Chapter 17.
Curing Time Estimator
Estimate concrete cure timeline (set, foot traffic, light load, full strength) based on temperature and mix design. Flags cold-weather risk.
Cost, Pricing & Estimating
Material cost, labor cost, delivery fees, ready-mix vs. bagged comparison, waste factor, price per yard by state, and full project estimation — everything needed to build a solid bid.
Concrete Cost Calculator
Estimate total material cost based on cubic yards needed and local price per yard. Supports both ready-mix and bagged concrete inputs.
Cost Per Square Foot Calculator
Break down concrete project cost by square foot for bids, comparisons, and homeowner quotes. Adjustable by slab thickness and mix type.
Concrete Delivery Cost Calculator
Estimate ready-mix delivery costs including base price per yard, short-load fees, and Saturday/overtime surcharges.
Ready-Mix vs. Bagged Cost Comparison
Side-by-side cost comparison for ready-mix vs. bagged concrete based on project volume. Includes labor and delivery variables.
Concrete Labor Cost Calculator
Estimate labor costs for flatwork and foundations based on crew size, hourly rate, and production rate per square foot.
Full Project Estimator
Complete project cost estimate covering concrete material, delivery, rebar, forming, labor, and overhead. Outputs a printable summary.
Waste Factor Calculator
Calculate recommended over-order quantity based on project complexity. Outputs adjusted total with 5%, 8%, and 10% waste scenarios.
Price Per Yard by State
Regional ready-mix concrete price reference by U.S. state. Updated benchmark ranges to use as starting points when local quotes aren't available.
Bid & Proposal Generator
Generate a formatted concrete bid proposal from project inputs. Outputs a client-ready document with scope, quantities, and pricing breakdown.
Adjacent Construction Materials
Calculators for materials that accompany concrete work — gravel, sand, topsoil, fill dirt, CMU blocks, brick, pavers, mortar, asphalt, mulch, polymeric sand, and recycled aggregate.
Gravel & Crushed Stone Calculator
Cubic yards and tons of gravel or crushed stone for subbase, drainage, and decorative applications. Supports multiple stone types.
Sand Calculator
Volume and weight estimation for bedding sand, mason sand, and concrete sand. Includes coverage at standard 1″ and 2″ depths.
Topsoil Calculator
Cubic yards of topsoil needed for lawn areas, raised beds, and grading. Includes conversion to bulk bags and loose truck loads.
Fill Dirt Calculator
Volume of fill dirt for site grading, trench backfill, and excavation fills. Accounts for compaction factor and swell percentage.
Mortar Calculator
Bags of mortar mix needed for brick, block, and stone masonry. Supports Type S, Type N, and Type M mortar with joint size inputs.
Concrete Block (CMU) Calculator
Block count and mortar quantity for CMU walls. Supports 8×8×16 and custom block sizes with standard 3/8″ joint thickness.
CMU Core Fill Calculator
Cubic yards of grout or concrete needed to fill CMU block cores for reinforced masonry walls. Supports full-fill and partial-fill patterns.
Brick Calculator
Number of bricks and mortar volume for walls, patios, and paving. Supports standard, modular, and queen-sized bricks with waste factor.
Paver Calculator
Paver count and base material quantities for concrete paver patios and driveways. Includes 10% pattern-cut waste allowance.
Retaining Wall Block Calculator
Number of segmental retaining wall blocks for a given wall height and length. Supports standard, large-format, and interlocking profiles.
Asphalt & Tarmac Calculator
Tons and cubic yards of asphalt for driveways, parking lots, and road patches. Supports standard 2″ and 3″ compacted depth.
Mulch Calculator
Cubic yards and bags of mulch for planting beds and landscape borders. Supports depths from 1″ to 4″ with coverage guidance.
Polymeric Sand Calculator
Bags of polymeric jointing sand needed for paver installations. Input area and joint width to get accurate coverage quantities.
Recycled Concrete Aggregate Calculator
Volume and weight of recycled crushed concrete (RCA) for subbase, fill, and drainage applications with compaction factor notes.
Advanced, Environmental & Utility Tools
Multi-shape volume calculation, project planning, concrete vs. asphalt comparison, sealer coverage, crack repair, demolition cost, carbon footprint, recycling savings, and unit conversion.
Multi-Shape Volume Calculator
Add multiple shapes (rectangles, cylinders, trapezoids) to calculate total project volume in a single estimate. Great for irregular layouts.
Concrete Project Planner
Step-by-step planning tool covering volume, mix selection, reinforcement, curing conditions, and cost — outputs a complete project summary.
Concrete vs. Asphalt Comparison
Side-by-side cost and lifecycle comparison for concrete vs. asphalt driveways, including installation, maintenance, and 20-year total cost.
Sealer Coverage Calculator
Gallons of concrete sealer needed for slabs, driveways, and decorative surfaces. Adjust for surface porosity and number of coats.
Crack Repair Calculator
Volume of crack filler or polyurethane foam needed based on crack length, width, and depth. Outputs fluid oz and cartridge count.
Demolition & Removal Cost Estimator
Estimate concrete demolition and haul-away cost based on slab area, thickness, rebar presence, and local disposal rates.
Carbon Footprint Calculator
Estimate CO₂ equivalent emissions for a concrete pour based on volume, mix design, and cement type. Useful for green building reporting.
Recycling Savings Calculator
Estimate cost savings and carbon reduction from using recycled concrete aggregate (RCA) vs. virgin crushed stone on a specific project.
Imperial to Metric Converter
Convert all common concrete units between imperial and metric — yards to meters, PSI to MPa, lbs to kg, and more in one place.
Expansion Joint Spacing Calculator
Recommended control joint and expansion joint spacing for slabs based on thickness, aggregate size, and temperature range per ACI 360.
Not sure which calculator fits your project?
With 80+ tools across 9 categories, the right starting point depends on your project type. Here's a quick guide based on the most common questions we receive.
For volume and quantity estimates, start with the category that matches your pour type — Flatwork for horizontal slabs, Foundations for below-grade work. If your project spans multiple shapes, use the Multi-Shape Volume Calculator.
For mix design and materials, use the Mix Design category if you're batching your own concrete. If you're ordering ready-mix, use the Conversion tools to confirm your order quantity and the Cost tools to build your budget.
For structural applications, the Structural category covers rebar sizing, slab thickness selection, load capacity, and beam design. These tools are reviewed by a licensed P.E. and referenced to ACI 318 — but always have structural outputs verified by an engineer for permitted work.
Pouring a driveway or patio?
Start with Flatwork & Slabs. Then use the Cost Calculator to build your budget.
Building a deck, fence, or shed base?
Use the Post Hole Calculator or Sonotube Calculator under Foundations.
Estimating a job for a client?
Use the Full Project Estimator and Bid Generator in the Cost category.
Checking structural design numbers?
Use Structural & Engineering tools for rebar, load capacity, and strength conversions — then verify with a licensed engineer.
Frequently Asked Questions
Quick answers to the questions we hear most often about our calculator library.
All 80+ tools. No account. No cost.
Open any calculator above and get an accurate estimate in under a minute. Built against ACI, ASTM, and ASCE standards — reviewed by a licensed P.E.