Browse 220 construction calculators

Cement Bags Calculator

Estimates how many bags of Quikrete, Sakrete, or other premix concrete needed for a project

Concrete Column Calculator

Calculates concrete for round columns, sonotubes and piers by height and diameter

Concrete Footing Calculator

Estimates concrete for strip, spread, and trench footings

Concrete Mix Ratio Calculator

Calculates cement, sand, gravel ratios for custom mix concrete

Concrete Pump Line Calculator

Checks a concrete pump line against the pump: equivalent length, line pressure and share of the pump rating

Concrete Slab Calculator

Calculates concrete volume for slabs, patios, sidewalks, and driveways

Concrete Slump Calculator

Classifies a target concrete slump and shows the ASTM C94 test tolerance

Concrete Steps Calculator

Estimates concrete volume for outdoor steps and porch stairs

Concrete Wall Calculator

Calculates concrete volume for poured walls, foundation walls, and stem walls

Floor Screed Calculator

Counts the bags of screed mix for a floor, and checks the depth for the screed type

Mortar Calculator

Estimates mortar bags needed for brick, block, or stone laying

Post Hole Concrete Calculator

Calculates concrete needed for setting fence posts, deck posts, or mailbox posts

Ready-Mix Truck Volume Calculator

Calculates how many ready-mix concrete trucks needed for a pour

Rebar / Reinforcement Calculator

Calculates rebar quantity, length, and weight for slabs and footings

Self-Leveling Underlayment Calculator

Calculates self-leveling underlayment for concrete floor prep before tile or vinyl install

Flat Roof Material Calculator

Calculates EPDM or TPO membrane rolls or GRP kits for a flat roof

Roof Furring Strip Calculator

Calculates furring strips for metal roof or board-and-batten installation

Gutter Calculator

Estimates linear feet of gutter needed for a roof based on eaves length

Hip Roof Area Calculator

Hip roof area from the plan and pitch, with rise, rafter, hip and ridge lengths

Lead Flashing Calculator

Estimates lead flashing length and weight for chimneys and abutments

Metal Roofing Calculator

Counts metal roof sheets in whole runs, eaves to ridge

Ridge Cap Calculator

Counts ridge cap shingles or ridge tiles, and packs, for ridges and hips

Roof Area Calculator

Calculates total roof area from footprint and pitch

Roof Flashing Calculator

Counts flashing pieces for drip edge, step flashing or valleys from the length and the coverage per piece

Roof Pitch Calculator

Calculates roof pitch in rise/run format and converts to angle

Roof Vent / Ventilation Calculator

Calculates required roof ventilation NFA per IRC 1:300 rule

Roofing Underlayment Calculator

Estimates synthetic underlayment, felt, or ice and water shield rolls needed

Asphalt Shingle Calculator

Calculates asphalt shingles by squares (100 sq ft)

Skylight Opening Calculator

Works out the rough opening to frame for a skylight or roof window from its outside frame size

Soffit & Fascia Calculator

Calculates linear metres of soffit and fascia around the eaves

Baseboard Calculator

Estimates linear feet of baseboard for a room perimeter

Deck Framing Calculator

Calculates deck joists, beams, and posts

Decking Board Calculator

Calculates deck boards by area

Floor Joist Calculator

Estimates floor joist count by room dimensions and spacing

I-Joist Calculator

Counts engineered I-joists across a floor from its width and the joist spacing

Lumber Calculator

Calculates board feet and linear feet of lumber for any project

Nail / Screw Quantity Calculator

Counts nails or screws and boxes from the area and fixing rate

Rafter Set-Out Calculator

Common rafter length, ridge deduction, plumb and seat cuts

Shed Lumber Calculator

Estimates wall studs and sheet material for a backyard shed from its size

Staircase Set-Out Calculator

Risers, going, stringer length and pitch from a floor-to-floor rise

Brick Arch Calculator

Calculates bricks needed for arched openings by span and rise

Brick Calculator

Calculates bricks needed for walls or veneer

Brick Tie Spacing Calculator

Counts brick wall ties for a wall from its area and jamb length, using US code or UK spacing

Concrete Block / CMU Calculator

Calculates concrete masonry units (CMU) for walls and foundations

Lintel Bearing Length Calculator

Works out the minimum lintel length for an opening, and the stock or modular length to order

Moisture Barrier Calculator

Counts the rolls of damp-proof course or base-of-wall moisture barrier a wall needs

Net Wall Area Calculator

Calculates net wall area by subtracting windows and doors

Quoin / Corner Brick Calculator

Estimates corner bricks for quoin detailing on brick veneer

Repointing Mortar Calculator

Estimates mortar quantity for repointing brick joints by wall area

Retaining Wall Calculator

Calculates blocks, base material, and backfill for segmental retaining walls

Stone Wall Calculator

Estimates stone tonnage for retaining walls or veneer by area and stone type

Stucco Calculator

Bags of stucco or render from wall area, total coat thickness and what one bag covers

Asphalt Calculator

Estimates short tons of hot-mix asphalt for a driveway or parking lot

Block Paver Calculator

Calculates concrete or brick driveway pavers by area

Concrete Driveway Calculator

Calculates concrete cubic yards and cost for a poured driveway

Driveway Cost Calculator

Estimates total driveway cost by surface type

Driveway Sealcoat Calculator

Calculates litres and pails of asphalt driveway sealer by area and coats

Permeable Paver Calculator

Counts permeable pavers and the stone layers beneath them

Resin-Bound Stone Calculator

Calculates resin and aggregate for a resin-bound surface from area, depth and supplier coverage rates

Stepping Stone Calculator

Counts the stepping stones for a garden path from its length and your stride

Bamboo Floor Calculator

Calculates bamboo flooring planks needed by area and plank size

Carpet Calculator

Calculates carpet square yards and square footage with seam planning

Epoxy Floor Coating Calculator

Estimates epoxy gallons for garage floor or basement coating

Flooring Calculator

General flooring square footage calculator with waste factor for any flooring type

Grout Calculator

Estimates grout bags needed by tile size and joint width

Hardwood Floor Calculator

Calculates hardwood flooring square footage and bundles by board size

Herringbone Floor Calculator

Counts herringbone or chevron blocks for a floor, with wastage, A and B split and cost

Laminate Flooring Calculator

Estimates laminate planks and boxes needed by room dimensions

Self-Leveling Compound Calculator

Bags of self-levelling compound from floor area, average depth and the coverage on the bag

Tile Calculator

Calculates floor and wall tiles by square footage with waste and pattern adjustments

Tile & Paving Layout Planner

Plan the tile layout, see where the cuts land, and count what to order

Tile Spacer Calculator

Counts the tile spacers a floor or wall needs from the tile count and how the tiles meet

Underlayment Calculator

Estimates underlayment rolls or sheets for laminate, vinyl, hardwood, or tile floors

Vinyl / LVT Flooring Calculator

Estimates LVP, LVT, and sheet vinyl flooring quantities

Air Sealing / Weatherstripping Calculator

Estimates annual energy savings from air sealing based on ACH reduction

Attic Baffle / Rafter Vent Calculator

Calculates the number of rafter-vent baffles needed along the eaves

Attic / Loft Insulation Calculator

Calculates rolls of mineral-wool loft insulation

Spray Foam Calculator

Estimates spray foam board feet by area and depth

Triple-Pane Window Savings Calculator

Estimates energy savings from triple-pane window upgrade

Vapour Barrier Calculator

Calculates rolls of 6-mil poly vapour barrier for walls and ceilings

Wall Insulation Cost Calculator

Estimates wall insulation cost

Deck Stain Calculator

Estimates deck stain or sealer gallons

Exterior Paint Calculator

Estimates exterior house paint gallons by siding area and coat count

Paint Thinning Calculator

How much thinner to add to paint for spraying, from the paint volume and the thinning percentage

Paint Weight Calculator

Calculates paint weight by gallon for shipping or load planning

Painting Cost Calculator

Estimates painting project cost by room area, paint cost, and labor

Primer Calculator

Calculates primer gallons for walls, ceilings, or exterior

Spray Paint Calculator: How Many Cans?

How many spray paint cans a job needs, from area, coats and coverage per can

Wallpaper Paste Calculator

Estimates wallpaper paste needed by wallpaper roll count

In-Floor Heating Tubing Calculator

Calculates the length of PEX tubing for an in-floor heating loop from area and spacing

Pipe Insulation Calculator

Counts the pipe insulation sleeves a pipe run needs, with the bore to buy

Crushed Stone Base Calculator

Calculates crushed stone or gravel base material for paver, driveway, or shed pads

Cut and Fill Calculator

Calculates cut and fill volumes for site grading

Dry Well / Soakaway Calculator

Sizes a dry well or soakaway pit to hold 15 minutes of roof runoff, allowing for the fill's void ratio

Dumpster Size Calculator

Calculates dumpster size needed by debris volume

Excavation Volume Calculator

Calculates excavation cubic yards for foundations, pools, or basements

French Drain Calculator

Calculates French drain materials

Pipe Slope Calculator

Calculates pipe fall by length and slope

Soil Compaction Calculator

Converts loose soil volume to bank and compacted volume by soil type

Weeping Tile Calculator

Calculates perforated weeping-tile pipe and gravel for a foundation perimeter drain

Yard Drainage Calculator

Estimates total drain pipe length for a yard French drain system

Acres to Hectares Calculator

Convert any acreage to hectares, square meters, and square feet instantly

Acres to Square Feet Calculator

Convert any acreage to square feet, square yards, and square meters instantly

Cubic Yards to Cubic Meters

Converts cubic yards to cubic meters, cubic feet, US gallons, and liters

Cubic Yards to Tons: Gravel, Soil & Sand

Convert cubic yards of gravel, soil or sand to tons and tonnes by density

Feet and Inches to Meters

Converts feet and inches to meters, centimeters, and millimeters

Gallons to Liters Calculator

Converts US gallons to liters, imperial gallons, US quarts, and cubic feet

kW to BTU Calculator

Converts kilowatts to BTU/hr and horsepower — exact factor, instant result

Linear Metres to Square Metres

Turns a length of roll material into the area it covers

Pounds to Bags Calculator

Converts pounds of material to bag count

Architect Fee Calculator

Estimates an architect's fee from construction value, fee percentage and scope

Build Project Budget Calculator

Estimates total construction project budget

Build Project Timeline Calculator

Estimates how long a build takes from a chain of overlapping tasks, with weather time and labour

Ceiling Height Calculator

Checks a ceiling height against published minimum room heights, in feet and metres

General Contractor Markup Calculator

Estimates general contractor overhead and profit markup

Floor Area Ratio / Plot Ratio Calculator

Calculates FAR and site coverage percentage for planning

Contractor Labor Cost Calculator

Estimates contractor and trade labor costs by hours, rates, and trade type

Material Cost Calculator

Calculates total material cost from quantities and unit prices

Project Contingency Calculator

Adds a contingency and your sales tax or VAT to a project budget

Structural Engineer Cost Calculator

Estimates structural engineer fees for residential or commercial projects

Bricklaying Time Calculator

Estimates bricklaying labour hours and days from wall area, a production rate and crew size

Concrete Cure Time Calculator

Reference for concrete cure time by mix and conditions

Drywall / Hanging Time Calculator

Estimates drywall hanging and finishing labour hours, days and cost from board area

Excavation Time Calculator

Estimates excavation hours, working days and cost from volume and machine rate

Groundwork Time Calculator

Hand digging and site clearing time from ILO productivity norms

Paint Drying Time Calculator

Recoat times from paint makers' data sheets, with checks for cold and condensation

Painting Time Calculator

Estimates painting labour hours and days from wall area, a production rate and crew size

Roofing Time Calculator

Estimates roof install or replacement hours by squares and crew size

Tiling Time Calculator

Estimates tile setting hours, days and labor cost from area and tile type

Appliance Cut-Out Size Calculator

Aperture size for a built-in appliance

Kitchen Cabinet Run Planner

How many cabinets fit a wall run, and the filler

Kitchen Backsplash Calculator

Calculates kitchen backsplash tile area between counter and upper cabinets

Kitchen Cabinet Calculator

Counts base and wall cabinets and fills the gap at the end of the run

Kitchen Countertop Calculator

Works out countertop length and area from your cabinet runs, deducting the overlap at each corner

Kitchen Renovation Cost Calculator

Estimates kitchen renovation cost by tier and scope

Range Hood / Vent Hood Sizing Calculator

Calculates range hood CFM by stove BTU output and kitchen size

Bathroom Tile Calculator

Calculates bathroom floor and wall tile by area

Bathtub Volume Calculator: How Many Gallons?

How much water a bathtub holds, in gallons or litres, from its inside size and water depth

Shower Pan Size Calculator

Calculates shower pan dimensions for typical shower stalls

Shower Slope / Pre-Slope Calculator

Works out the fall a shower floor needs to its drain, and checks the slopes against the code limits

Toilet Clearance Checker (IRC & ADA)

Check toilet side and front clearances against IRC minimums

Waterproof Membrane Calculator

Rolls or pails of shower waterproofing, sheet or liquid

Ceiling Joist Calculator

Ceiling joist count, cut length and total from spacing and span

Chair Rail Calculator: Feet, Pieces & Cost

Chair rail length, pieces to buy and material cost for a room

Crown Molding Calculator

Calculates crown molding linear feet with miter waste allowance

Acoustic Ceiling Tile Calculator

Calculates drop ceiling tiles, grid, and runners for suspended ceilings

Drywall Calculator

Calculates drywall sheets needed by room area

Joint Compound / Mud Calculator

Estimates joint compound (mud) buckets needed for drywall finishing

Paint Calculator

Calculates gallons of paint needed by wall area and coat count

Wall Cladding / Siding Calculator

Calculates exterior siding by wall area

Stud Wall Calculator

Calculates studs, plates, and headers for framing a wall

Wall Insulation Calculator

Estimates wall insulation batts or rolls

Wallpaper Calculator

Calculates wallpaper rolls needed including pattern repeat allowance

Door Rough Opening Calculator

Calculates rough opening dimensions for pre-hung doors

Flyscreen Calculator

Calculates the flyscreen mesh area needed from your window and door opening sizes

Rooflight & Skylight Daylight Area Calculator

Recommended rooflight area for good daylight

Window Area Calculator

Calculates window glass area for energy or replacement planning

Window Energy Rating Calculator

Estimates window energy rating (A to G) from U-value and solar gain

Window Replacement Cost Calculator

Estimates window replacement cost

Window Sill Calculator

Calculates window sill or stool material by linear feet of windows

Artificial Turf Calculator

Calculates artificial turf rolls and infill needed by area

Drip Irrigation Calculator

Estimates drip line, emitters, and fittings for garden irrigation

Fence Calculator

Estimates fence posts, panels, rails, and bottom boards by length

Grass Seed Calculator

Estimates grass seed pounds for new lawn or overseeding by area

Gravel / Aggregate Calculator

Calculates gravel cubic yards or tons by area and depth

Greenhouse Size Calculator

Recommends a greenhouse size from household size and growing focus

Landscape Timber Calculator

Counts landscape timbers or sleepers for raised beds and edging from the run, timber length and courses

Mulch Calculator

Calculates mulch cubic yards or bags needed by garden bed area and depth

Paver Calculator

Calculates patio pavers or stones needed by area

Pond Liner Calculator

Calculates EPDM pond liner size needed including overlap

Pond Volume Calculator

Calculates pond water volume in gallons by dimensions

Rain Barrel Size Calculator

Calculates rain barrel size by roof catchment area and rainfall

Raised Bed Soil Calculator

Calculates soil cubic feet or yards needed to fill a raised garden bed

Sand Calculator

Calculates sand by tons or cubic yards

Sod Calculator

Calculates sod rolls needed by lawn area, including a wastage allowance and estimated cost

Topsoil Calculator

Calculates cubic yards of topsoil needed for lawn or garden coverage

Angle Iron Weight Calculator

Weight and cost of steel angle, equal or unequal, from leg sizes, thickness and length

Attic Conversion Cost Calculator

Estimates cost to convert attic to living space

Bathroom Remodel Cost Calculator

Estimates bathroom remodel cost

Deck / Patio Cost Calculator

Estimates deck or patio construction cost

Flooring Installation Cost Calculator

Estimates flooring install cost by material

Garage Conversion Cost Calculator

Estimates garage to living space conversion cost

Home Addition Cost Calculator

Estimates home addition cost per square foot

HVAC Replacement Cost Calculator

Estimates HVAC system replacement cost

Kitchen Remodel Cost Calculator

Estimates kitchen remodel cost

New Home Build Cost Calculator

Estimates new home build cost per square foot

Pool Build Cost Calculator

Estimates inground pool construction cost

Roof Replacement Cost Calculator

Estimates roof replacement cost by material type

Stucco / Siding Cost Calculator

Estimates exterior stucco or siding cost

Area from Coordinates Calculator

Calculates land area from survey coordinate points

Bearing and Distance Calculator

Calculates bearing and distance between two GPS points

Contour Interval Calculator

Reference for contour intervals on topographic maps by scale

Solar Panel Savings Calculator

Estimates annual savings from solar panels by system size

Window Energy Savings Calculator

Estimates energy savings from window replacement by U-factor improvement

Pool Concrete Calculator

Concrete for a pool shell, including the corners and the slab under the walls, with gunite rebound

Pool Liner Size Calculator

Sizes a flat liner sheet for a rectangular pool or pond from its length, width, depth and overlap

Pool Tile Calculator

Estimates the number of tiles needed to cover a given pool tile area, including waterline bands, plus estimated cost

Pool Volume Calculator

Calculates pool water volume in gallons

Crystalline Waterproofing Calculator

Calculates crystalline waterproofing coverage for concrete

Damp Proof Injection Calculator

Calculates injection cream quantity for remedial DPC installations

Foundation Waterproofing Calculator

Calculates waterproofing membrane for foundation walls

Liquid Rubber / Roof Coating Calculator

Works out liquid rubber or roof coating gallons from area, coverage and coats

Battery Bank Capacity Calculator

Size a battery bank in kWh, Ah and unit count

Generator Sizing & Runtime Calculator

Size a backup generator and work out fuel runtime and cost

Inverter Sizing Calculator

Pick an inverter kW rating from your running and surge loads

Solar Array Sizing Calculator

Size the array and panel count for a target daily energy need

Battery Cost per Usable kWh Calculator

Compare batteries on cost per usable kWh and per cycle

Solar Cost per kWh Generated Calculator

Work out the lifetime cost of each kWh a system generates

Solar System Cost Estimator

Build a costed bill of materials for a solar system

EV Charging Cost & Time Calculator

Work out charge time and cost from empty to target

Heat Pump Sizing Calculator

Indicative heat pump kW from floor area and fabric

Cinema Seating Rows & Sightlines Calculator

How many seating rows fit, and how high each row must sit to see over the heads in front

Surround Speaker Layout Calculator

Turns Dolby speaker angles into measured positions for your room

TV Size vs Viewing Distance Calculator

Recommended screen size for a seat distance

AC Ducting Length Calculator

Duct run length and fittings for ducted AC

Air Conditioning Running Cost Calculator

Daily and annual AC running cost

Air Conditioning Sizing Calculator (BTU/kW)

Cooling load in BTU and kW for a room

Multi-Room AC Sizing Calculator

Total cooling load across several rooms

Camera Count for Area Calculator

How many cameras to cover a site perimeter

Security System Cost Estimator

Costed bill of materials for a camera system