Construction and renovation
Wallpaper Calculator — Rolls, Pattern Repeat & Cost
Estimate wallpaper rolls for rooms or separate walls. Account for strip rounding, trim, straight or half-drop repeat, reserve, reusable offcuts, leftover length, and cost.
Brick & Block Calculator — Units, Pallets & Mortar
Estimate new brick, breeze-block and glass-block walls. Calculate courses, edge cuts, whole units, pallets, installation mortar and material cost.
Tile Layout Calculator — Square Feet, Edge Cuts & Boxes
Compare centered tile layouts and both orientations, then calculate square footage, edge cuts, tiles, boxes, waste, grout and cost.
Paint Calculator — Gallons, Liters, Cans & Cost
Estimate paint for rooms, walls, and ceilings. Subtract doors and windows, set coats and coverage, and see gallons or liters, cans, leftover paint, and cost.
Tubing Capacity Calculator
Calculate tubing capacity from a common size and weight, actual ID, or OD and wall thickness; total stepped strings and plan pump volume, time and strokes.
Annular Space & Capacity Calculator
Calculate annular space capacity and volume, solve target fill length, total stepped intervals, and estimate bottoms-up strokes and circulation time.
Attic Ventilation Calculator & NFA Plan
Compare retained vent openings with rounded additions and the actual extra vent length or slots available.
Baluster Spacing Calculator — Verified Layout & Marks
Plan baluster counts and exact centre marks across one or more railing bays. Check every clear gap after rounding marks to your tape increment.
Baseboard Calculator — Boards & Cut List
Turn measured wall runs into boards to buy and a labelled cutting plan. Allow for saw cuts, fitting, stock ends and spare boards.
Beam Deflection Calculator — Loads & Diagrams
Combine point and distributed loads on a simply supported or cantilever beam. Explore deflection, shear, bending moment and reactions in metric or US units.
Birdsmouth Cut Calculator
Lay out a common-rafter birdsmouth from seat length, target HAP or notch depth. See true perpendicular removal, plate bearing, angles and a printable measurement sheet.
Board Foot Calculator — Lumber List & Cost
Add stock boards, compare supplier quote units and estimate your lumber order. See board feet, whole spare boards and a clear cost breakdown.
Board and Batten Calculator — Spacing & Layout
Plan even batten spacing in inches or millimetres. Compare layouts, see a scaled wall and print precise installation marks.
Carpet Calculator — Roll Length, Layout & Cost
Compare two carpet layouts, allow for edge trimming, and estimate roll length and costs from your supplier’s quotes.
Carport Calculator — Layout, Materials & Cost
Plan a freestanding steel carport with an editable post grid, roof, sheets, framing lengths, footings, fasteners and a transparent preliminary material budget.
Concrete Calculator — Cubic Yards, Bags & Cost
Enter a slab, footing, column, stair, or mixed pour and see concrete cubic yards immediately, then refine waste, truck loads, bags, and cost.
Deck Board Calculator — Cut List, Stock Lengths & Cost
Compare board directions and stock lengths for a rectangular deck. Count cut pieces, gaps, saw kerf, spare boards and quoted material cost.
Dry Well Calculator — Storage, Pit Size & Drain Time
Size or check a residential dry well from roof runoff, rainfall, storage media, pit dimensions and a measured infiltration rate. Compare storage, drain-down, excavation, fabric, modules and editable cost.
Drywall & Plasterboard Calculator — Sheets & Cost
Plan drywall or plasterboard for one or several rooms. Choose US or metric board sizes, separate walls and ceilings, subtract openings and price your order in USD or GBP.
Drywall Mud Calculator — Compound & Tape Purchase Plan
Estimate joint compound and paper tape from installed drywall area, then round to whole containers and subtract full packages already on hand.
Duct Size Calculator — Compare Available Sizes
Compare your round and rectangular duct sizes against airflow, velocity, straight friction and available space. Work in US or SI units and save your comparison.
Fence Calculator — Panels, Posts, Gates & Cost
Plan fence panels, shared posts and gate openings for connected or separate runs. Compare material, delivery and installation quotes.
Fence Picket Calculator — Boards, Gaps & Layout
Plan individual fence pickets across unequal bays. See even gaps, inspect board positions, add whole spare boards and print your layout.
Firewood Cord Calculator — Stack & Delivery Check
Measure one or more compact firewood stacks, compare them with a full cord and check the quantity on a receipt.
French Drain Calculator — Gravel, Pipe & Fabric
Plan a French drain with changing ground levels. Estimate gravel, pipe pieces, fabric rolls and your material costs with a live trench profile.
Grass Seed Calculator — Lawn Areas, Bags & Cost
Plan seed for multiple lawn areas using your product label. Combine new lawns and overseeding, subtract existing seed and buy whole bags.
Gravel Calculator — Volume, Tons, Bags & Delivery
Estimate gravel for rectangular, circular or measured areas. Compare cubic yards, tons, bags, supplier order increments and delivery costs.
Grout Calculator — Coverage & Package Purchase Plan
Plan grout for floors, walls and backsplashes. Combine product-specific coverage, keep colours separate, and get whole packages, remainder and an optional cost.
Heat Loss Calculator — Walls, Windows & Air Leakage
Estimate design heat loss through walls, windows, ceiling, floor and air leakage, with an editable BTU/h and kW breakdown.
Insulation Calculator — Packages, Layers & Cost
Plan batts, rolls or loose-fill bags from product-label coverage. Combine surfaces, keep products separate and build a purchase list with your own quotes.
Laminate Flooring Calculator — Layout, Cartons & Cost
Plan laminate for multiple rooms. Compare row direction, reuse compatible offcuts and calculate separate carton orders with existing stock and your prices.
Mulch Calculator — Beds, Bags, Bulk & Cost
Plan mulch for multiple garden beds, subtract existing layers and stock, then compare whole bags with bulk delivery using your quotes.
Paver Calculator — Patio Layout, Base & Packs
Plan a patio or path: compare straight paver layouts, count cuts and estimate base, bedding, packs and supplier costs.
Picture Frame Calculator — Dimensions & Cut List
Plan a rabbeted picture frame from its package, outside or visible opening. Get finished rail dimensions, a feasible stock cutting plan and a printable shop sheet.
Pipe Displacement Calculator
Compare closed-end, open-end and steel-body pipe displacement from actual OD, ID and length; solve target displacement length and cross-check internal capacity.
Plant Spacing Calculator — Bed Layout & Plant Count
Plan actual planting places in a rectangular bed, compare row directions and turn the layout into a whole-pack plant order.
Rafter Length Calculator — Pitch, Overhang & Ridge
Calculate common rafter line length with roof pitch, horizontal overhang and ridge-board deduction. View the section and print your measurements.
Rainwater Harvesting Calculator — Tank Size & Daily Balance
Compare rainwater tanks using a storm and dry spell or your daily rainfall data. See water supplied, shortages, overflow and the reserve left each day.
Rectangular Tube Load Calculator — RHS & SHS Beam
Check RHS or SHS bending stress, deflection and estimated load capacity for steel, stainless steel or aluminum with simple, fixed or cantilever supports.
Retaining Wall Calculator — Blocks, Gravel, Drainage & Cost
Estimate a segmental retaining wall from editable block geometry. Calculate courses, blocks, pallets, caps, base and drainage aggregate, pipe, fabric, excavation and cost.
Roof Shingle Calculator — Roof Planes, Bundles & Cost
Plan shingle bundles for multiple roof planes, with pitch, product coverage, starter strips, ridge caps and your material quotes.
Segmented Bowl Calculator & Ring Cut Planner
Shape a finished bowl profile and plan each horizontal ring, turning allowances and separate-segment wood strips.
Sheet Cut List Optimizer
Plan a cuttable plywood or MDF sheet layout with blade kerf, edge trim and grain-aware rectangular parts.
Shiplap Calculator & Cut Planner
Place wall openings and chosen joints, inspect each shiplap row and get a feasible board cutting schedule.
Sod Calculator — Rolls, Pallets & Installation Cost
Plan lawn areas, whole pallets or loose rolls, and compare your quoted costs with refundable pallet deposits shown separately.
Soil Calculator — Topsoil, Raised Beds, Bags & Cost
Plan new soil for beds and measured areas. Subtract existing fill and compare whole bags with bulk orders and delivery quotes.
Solar & Battery Calculator: Output, Backup and Payback
Estimate rooftop solar panels, output, self-use, exports, battery size, backup hours, shifted energy, payback and 20-year cash flow.
Stair Runner Calculator & Cut Planner
Choose the actual stair surfaces covered, enter measured paths, and plan separate runner cuts and supplier lengths.
Stair Stringer Calculator — Rise, Run & Layout
Plan a straight staircase, fit the available space and compare riser counts. See a proportional drawing and print your dimensions in inches or millimetres.
Steel Tube Roof Truss Calculator — Loads & Deflection
Build a gable, mono-pitch or arched rectangular-tube truss and calculate roof loads, reactions, member forces, deflection, tube mass and a cut schedule.
Stud Wall Calculator — Layout & Lumber List
Lay out regular wall studs and rough door or window openings, then see a transparent preliminary lumber list.
Tuckpointing Calculator — Mortar, Bags, Labor & Cost
Estimate tuckpointing and repointing from wall area or measured mortar-joint length. Calculate joint footage, mortar volume, whole bags, labor hours and cost.
