Construction & DIY Calculators
117 free estimators for contractors and DIYers—concrete, decks, roofs, fences, MEP, and yard projects.
Concrete & Masonry
Asphalt Driveway Calculator
Estimate asphalt tons for driveway resurfacing by area and depth.
Block Wall Calculator
Count concrete blocks for retaining and garden walls.
Brick Wall Calculator
Estimate brick count for veneer and structural walls.
Cinder Block Calculator
Calculate cinder blocks needed for foundation and basement walls.
Paver Patio Calculator
Estimate pavers and base gravel for patio projects.
Retaining Wall Estimator
Count blocks for segmental retaining wall projects.
Concrete Slab Calculator
Estimate concrete yards and bags for slab pours.
Concrete Footing Calculator
Calculate footing concrete volume for foundation strips.
Concrete Wall Calculator
Estimate concrete for poured walls by length, height, and thickness.
Concrete Column Calculator
Volume for round concrete columns and piers.
Concrete Tube Calculator
Concrete for cylindrical sonotube forms.
Concrete Hole Calculator
Concrete for multiple round post holes.
Concrete Curb Calculator
Estimate curb and gutter concrete volume.
Concrete Stairs Calculator
Approximate concrete for solid stair pours.
Atterberg Limits Calculator
Plasticity index from liquid and plastic limits.
Concrete Calculator
Calculate concrete bags and cubic yards for slabs and footings.
Decking & Framing
Deck Joist Spacing Calculator
Find joist count and spacing for deck framing plans.
Floor Joist Sizing Calculator
Count floor joists for a given span and spacing.
Ceiling Joist Sizing
Estimate ceiling joist count for attic framing layouts.
Board Foot Calculator
Convert lumber dimensions to board feet for pricing.
Lumber Weight Calculator
Estimate lumber weight for hauling and load planning.
OSB Sheathing Calculator
Count OSB sheets for wall and roof sheathing.
Deck Board Calculator
Count decking boards for length and width.
Deck Concrete Pier Calculator
Concrete volume for deck footing piers.
Deck Post Estimator
Estimate deck support posts for span and spacing.
Deck Railing Calculator
Linear feet of railing for deck perimeter.
Spiral Staircase Calculator
Steps and rotation for spiral stair diameter.
Stair Baluster Spacing Calculator
Baluster count with even spacing between posts.
Stair Rise and Run Calculator
Calculate rise, run, and stringer length for stairs.
Stair Stringer Calculator
Number of stair stringers for tread width.
Wall Framing Stud Calculator
Stud count for wall length and spacing.
Wood Shrinkage Calculator
Estimate lumber shrinkage across moisture change.
Stair Calculator
Calculate rise, run, and step count.
Deck Calculator
Estimate decking boards, joists, and piers.
Roofing & Gutters
Roof Pitch Calculator
Convert roof rise and run to pitch angle and ratio.
Roof Rafter Length Calculator
Calculate rafter length from span and pitch.
Metal Roofing Sheet Calculator
Estimate metal roof panels and screws for roof area.
Gutter Sizing Calculator
Size downspouts from roof catchment area.
Roof Area Estimator
True roof area from footprint and pitch.
Roof Shingle Calculator
Shingle bundles from roof area.
Roof Truss Sizing Calculator
Estimate roof truss count and spacing for span length.
Ridge Vent Calculator
Ridge vent linear feet for balanced attic ventilation.
Roofing Calculator
Estimate roof area and shingle bundles.
Fencing & Landscaping
French Drain Calculator
Estimate gravel volume for French drain trenches.
Chain Link Fence Calculator
Estimate chain link fabric and posts for fence runs.
Fence Post Calculator
Count fence posts for wood and vinyl fence layouts.
Fence Picket Calculator
Calculate pickets needed for spaced fence designs.
Fence Rail Calculator
Estimate horizontal rails between fence posts.
Gravel Volume Calculator
Cubic yards of gravel for driveways and paths.
Mulch Volume Calculator
Cubic yards of mulch for beds and landscaping.
Vinyl Fence Calculator
Estimate vinyl fence panels and posts for fence runs.
Mulch Calculator
Estimate mulch and gravel cubic yards.
Drywall & Interior
Baseboard Estimator
Calculate linear feet of baseboard trim per room.
Crown Molding Estimator
Estimate crown molding length with waste allowance.
Drywall Mud Estimator
Estimate joint compound gallons from drywall sheet count.
Drywall Tape Estimator
Calculate drywall tape feet from sheet layout.
Fiberglass Batt Insulation Calculator
Count insulation batts for wall and ceiling coverage.
Drywall Sheet Calculator
Count drywall sheets from wall area.
Wainscoting Layout Calculator
Wainscoting panels and linear feet per room.
Drywall Calculator
Estimate drywall sheets, tape, and compound.
Flooring & Tile
Grout Volume Calculator
Estimate grout volume for tile joints and backsplash.
Carpet Roll Calculator
Calculate carpet roll length from room dimensions.
Carpet Tile Calculator
Count carpet tiles for office and basement flooring.
Floor Tile Calculator
Tiles needed for floor area with waste allowance.
Hardwood Flooring Calculator
Estimate hardwood flooring boxes or planks.
Laminate Flooring Calculator
Laminate flooring boxes for room dimensions.
Wall Tile Calculator
Tiles needed for backsplash or shower wall area.
Tile Layout Calculator
Plan tile count with layout waste for floors.
Subway Tile Pattern Calculator
Subway tile count for herringbone or offset patterns.
Subfloor Plywood Calculator
Plywood sheets for subfloor over joists.
Vinyl Plank Flooring Calculator
Vinyl plank boxes for room area.
Tile Calculator
Calculate tiles and boxes for floors and walls.
Flooring Calculator
Estimate flooring boxes and cost.
Paint & Finish
Ceiling Painting Calculator
Paint gallons for ceiling area and coats.
House Exterior Painting Calculator
Exterior paint gallons from wall area.
Room Painting Calculator
Paint gallons for interior room walls and ceiling.
Trim Painting Calculator
Paint for baseboards, crown, and door trim linear feet.
Wallpaper Roll Calculator
Wallpaper rolls from wall area and pattern repeat.
Paint Calculator
Estimate paint gallons for rooms and walls.
Wallpaper Calculator
Estimate wallpaper rolls with pattern repeat.
HVAC & Energy
HVAC Sizing Calculator
Estimate HVAC BTU load from square footage and climate.
AC Tonnage Calculator
Convert room size to recommended AC tonnage.
Furnace BTU Sizing Calculator
Size furnace BTU output for home heating loads.
Mini Split Sizing Calculator
Size ductless mini split BTU for room or zone.
Radiator Sizing Calculator
Estimate radiator BTU for hydronic heating rooms.
Attic Ventilation Calculator
Calculate attic vent area for balanced ventilation.
Insulation R-Value Calculator
Plan insulation layers to reach target R-value.
Solar Inverter Sizing Calculator
Size solar inverter watts from panel array output.
Solar Panel Payback Calculator
Estimate years to pay back solar panel system cost.
Solar Battery Bank Sizing Calculator
Size off-grid battery bank kWh for daily usage.
Spray Foam Insulation Yield Calculator
Estimate spray foam kits needed for wall and ceiling area.
HVAC Heat Load Calculator
Estimate heating BTU load from square footage and climate.
Solar Panel Output Calculator
Daily kWh from panel wattage and sun hours.
Electrical & Plumbing
Generator Sizing Calculator
Size backup generator kW from appliance watt list.
Breaker Panel Load Calculator
Estimate main panel load in amps from circuit watts.
Conduit Fill Capacity Calculator
Check conduit fill percent against NEC guidelines.
Duct Sizing CFM Calculator
Calculate CFM from room volume and air changes.
Pipe Flow Rate Calculator
Estimate water flow GPM from pipe diameter and velocity.
Pipe Volume Calculator
Calculate water volume in pipes for flushing and treatment.
Leach Field Size Calculator
Estimate septic leach field area by bedroom count.
Sump Pump Sizing Calculator
Size sump pump GPM for basement pit drainage.
Water Heater Sizing Calculator
Recommend tank water heater gallons by fixture count.
Aquarium Heater Sizing Calculator
Size aquarium heater watts for tank volume.
Power Factor Capacitor Sizing
Calculate kVAR for power factor correction capacitors.
Accumulator Sizing Calculator
Hydraulic accumulator volume sizing estimate.
Septic Tank Sizing Calculator
Size septic tank gallons by bedrooms and daily flow.
Wire Size Ampacity Calculator
Estimate ampacity and max load for wire gauge.
Tankless Water Heater Flow Calculator
Required GPM for tankless heater sizing.
Water Pressure Loss Calculator
Estimate PSI loss in pipe runs.
Outdoor & Garden
Compost Bin Sizing Calculator
Calculate compost bin volume from dimensions.
Fertilizer Coverage Calculator
Estimate fertilizer bags for lawn area and application rate.
Lawn Seed Spreading Calculator
Calculate grass seed pounds for overseeding or new lawn.
Plant Spacing Calculator
Count plants per bed from spacing and area.
Cobblestone Calculator
Estimate cobblestone or gravel tons for paths.
DIY Compound Geometry Estimator
Sum multiple rectangular areas for custom shape projects.
Sand Volume Calculator
Cubic yards of sand for paver base or fill.
Topsoil Volume Calculator
Topsoil cubic yards for lawn leveling and beds.
Running out of drywall mid-project or under-ordering concrete costs time and delivery fees. These free estimators help homeowners and contractors quantity materials with transparent formulas and shareable results.
A practical estimating workflow
Measure on site with a laser or tape, sketch a simple plan, then run one calculator per material class: structure (concrete, lumber), enclosure (roof, siding), interior (drywall, paint), and MEP (HVAC, electrical).
Add waste for each line item rather than a single blanket percentage—tile and crown molding need more buffer than paint.
Structural vs finish materials
Structural calculators (footings, joists, load panels) inform safety and code discussions with your contractor. Finish calculators (paint, tile, carpet) focus on coverage rates and pattern repeat.
Use our dedicated concrete and deck calculators for multi-mode projects, then specialty tools for joist spacing, railing, and pier counts.
HVAC, electrical, and solar sizing
BTU and tonnage tools provide ballpark equipment sizes from square footage. Final HVAC design requires Manual J load calculations and duct layout.
Solar payback and battery bank tools help compare incentives and off-grid autonomy before talking to installers.
Last updated: August 6, 2026
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Related Calculators
AC Tonnage Calculator
Estimate ac tonnage quantities for DIY and contractor projects.
Aquarium Heater Sizing Calculator
Estimate aquarium heater quantities for DIY and contractor projects.
Asphalt Driveway Calculator
Estimate asphalt driveway quantities for DIY and contractor projects.
Attic Ventilation Calculator
Estimate attic ventilation quantities for DIY and contractor projects.
Baseboard Estimator
Estimate baseboard quantities for DIY and contractor projects.
Block Wall Calculator
Estimate block wall quantities for DIY and contractor projects.