MoreThanACalculators
Construction & DIY Calculators
Plan framing, drywall, roofing, insulation, concrete, and basic structural checks with fast, practical tools. Use the categories below to find the right calculator in seconds.
Tip: Try “stud”, “screw pattern”, “rafter”, “R-value”, “U-value”, or “paint coverage”.
Framing & Drywall
Stud spacing and screw patterns for clean, reliable builds.
Roofing & Stairs
Rafter length, roof slope, and stair angle helpers.
Concrete & Materials
Concrete weight and mix ratio, plus material planning helpers.
Concrete Weight Calculator
Estimate concrete weight from volume/dimensions.
Concrete Mix Ratio Converter
Convert ratios for mixing and batching.
Lumber Size Converter
Convert nominal vs actual lumber sizes.
Tile Size to Area Converter
Convert tile size to coverage area.
Paint Coverage Converter
Estimate coverage based on area and yield.
Insulation & Energy
Insulation thickness planning and energy-performance basics.
DIY Converters
Quick conversions that help with materials and planning.
Popular Construction & DIY Calculators
Most-used tools people typically start with.
Construction & DIY Calculators FAQ
Quick answers to common project questions.
Which tool should I use first for framing?
Start with the Stud Spacing calculator to plan layout, then use the Drywall Screw Pattern tool for finishing.
What’s the difference between R-value and U-value?
R-value measures resistance to heat flow (higher is better). U-value measures heat transfer (lower is better).
Are these calculators “code compliant”?
They’re great for planning and estimation. For permitting or structural decisions, verify inputs and local code requirements.
More construction and home calculators
Further tools in this category that were not listed above.
Volume Calculator
Volume of boxes, cylinders, spheres and other shapes.
Cubic Yards to Tons Calculator
Tons of gravel, sand or soil from cubic yards.
Inches to Fraction Calculator
Decimal inches to the nearest tape-measure fraction.
Home Energy Savings ROI Calculator
Payback of insulation, windows and other energy upgrades.
Acreage Calculator
Acres from length and width or from a map area.
Cubic Meter Calculator
Volume in cubic metres from dimensions.
Cubic Feet Calculator
Volume in cubic feet from dimensions.
Siding Material Calculator
Siding needed for a wall area minus openings.
Roofing Underlayment Calculator
Underlayment rolls needed for a roof area.
Ceiling Tile Coverage Calculator
Ceiling tiles needed for a room.
Plywood Weight Calculator
Weight of plywood sheets by thickness and type.
Drywall Weight Calculator
Weight of drywall sheets by size and thickness.
Concrete Slump Conversion Calculator
Convert concrete slump between inches and millimetres.
Floor Load Capacity Calculator
Load a floor can carry from joist size and spacing.
Column Buckling Calculator
Euler critical buckling load of a column.
Beam Load Capacity Calculator
Safe load for a beam from span, section and material.
Cantilever Beam Calculator
Deflection and moment of a cantilever under load.
Beam Deflection Calculator
Midspan deflection of a simply supported beam.
Boiler Size Calculator
Boiler output needed for a home's heat loss.
Gas Furnace Efficiency Calculator
Fuel cost and savings from furnace AFUE.
Heat Pump Savings Calculator
Yearly savings from switching to a heat pump.
EER Rating Calculator
Cooling efficiency and cost from an EER rating.
Mulch Calculator
Cubic yards of mulch for a bed at a chosen depth.
Soil Volume Calculator
Soil needed for beds, pots and lawns.
Deck Board Calculator
Boards and fasteners needed for a deck.
Fence Length Calculator
Posts, rails and pickets for a fence run.
Drywall Sheets Calculator
Sheets, mud and tape for walls and ceilings.
Roofing Shingles Calculator
Bundles and squares of shingles for a roof.
Flooring Cost Calculator
Material and labour cost for a flooring job.
Tile Calculator
Tiles and boxes needed for a floor or wall.
Paint Calculator
Gallons of paint for walls, ceilings and coats.
Pipe Volume Calculator
Water volume inside a pipe from diameter and length.
HVAC Tonnage Calculator
Air conditioner size in tons for a floor area.
Home Energy Calculator
Household energy use and cost by appliance.
What the construction and DIY calculators cover
These tools answer the questions that come up before a trip to the builders’ merchant: how much material to buy, whether a member is strong enough, and what a job will cost. Every calculator runs in your browser and shows the formula and the waste allowance it applies, so you can adjust the figures for your own site. They fall into five groups.
Material quantities
The paint calculator, tile calculator, drywall sheets calculator, roofing shingles calculator and siding calculator turn an area into boxes, sheets, bundles and gallons. Outdoors, the deck board calculator, fence calculator, mulch calculator and soil volume calculator do the same for timber, posts and bulk materials, and the cubic yards to tons calculator converts volume into the weight a supplier quotes.
Concrete and volume
The concrete volume calculator gives cubic yards and bag counts for slabs, footings and columns, the concrete weight calculator tells you what that pour weighs, and the mix ratio converter and slump converter handle batching and consistency. For odd shapes, the volume calculator, cubic feet calculator, cubic metre calculator and pipe volume calculator fill in.
Framing, roofing and structure
The stud spacing calculator and screw pattern calculator lay out walls, the rafter length calculator, slope converter and stair angle calculator handle pitch and rise, and the lumber size converter translates nominal sizes into actual dimensions. For structural checks, the joist span calculator, beam load capacity calculator, beam deflection calculator, floor load calculator, column buckling calculator and wind load calculator give preliminary figures that a code table or an engineer must confirm.
Insulation, heating and cooling
The insulation thickness calculator and U-value calculator size a wall or roof build-up for a target performance. The HVAC tonnage calculator and boiler size calculator pick equipment capacity, and the SEER, EER, furnace efficiency and heat pump savings calculators compare running costs. The energy savings ROI calculator tells you how long an upgrade takes to pay back.
Costs and conversions
The flooring cost calculator combines material and labour, and the tile size to area and paint coverage converters turn product data into coverage. The inches to fraction calculator, height converter, angle converter and acreage calculator handle the measurements around a job.
Getting the quantities right
- Measure twice, in one unit. Mixing feet and metres on the same job is the most common source of a wrong order.
- Subtract openings, then add waste. Doors and windows come off the area; 10% waste for straight tile or flooring, 15% for diagonal layouts, and one extra bundle of shingles per hip or valley go back on.
- Check what a package covers. Coverage on a paint can assumes a smooth, primed surface; rough block can halve it.
- Treat structural results as a first pass. Span and load calculators use simplified formulas without every code factor. Permits require the adopted tables or a stamped calculation.
A typical job
Planning a 12 by 16 ft deck: the deck board calculator gives the boards and screws, the joist span calculator confirms 2×8 joists at 16 inches will span the width, the fence calculator handles the railing posts, and the concrete volume calculator sizes the footings. The flooring cost calculator, run with decking prices, gives a budget for the whole thing before any timber is ordered.