Free Construction Calculators

Concrete

Slabs, columns & stairs

Calculate the cubic yards of concrete and number of 60 or 80 lb bags for a slab, patio, driveway, round column, Sonotube footing or concrete stairs.

Rebar

Slab reinforcement

Calculate how much rebar a concrete slab needs — bar count, total linear feet, number of 20 ft sticks to buy and the steel weight — from the slab size, grid spacing and bar size.

Concrete Block

Blocks, mortar & fill

Calculate how many concrete blocks (CMU / cinder blocks) a wall needs, plus the bags of mortar and optional core-fill grout — from the wall's length, height, block size and openings.

Brick

Bricks, mortar & cost

Calculate how many bricks a wall needs, plus the bags of mortar and the cost — from the wall's size, brick size, mortar joint, bond pattern and openings.

Concrete Bags

Small pours

Find out how many bags of pre-mixed concrete you need for a given volume, by bag size (40, 60 or 80 lb).

Cubic Yards

Any bulk material

Convert length, width and depth into cubic yards for concrete, soil, gravel, mulch or any bulk material.

Cubic Feet

Volume of anything

Calculate cubic feet from length, width and height, and convert to cubic yards, cubic meters and gallons.

Square Footage

Rooms & floors

Calculate the square footage of a room or area from its length and width, with optional quantity for multiple rooms.

Square Yards

Carpet & flooring

Convert a length and width in feet to square yards — for carpet, flooring and landscaping orders.

Linear Feet

Flooring & trim

Convert square footage to linear feet for flooring, decking, lumber or trim — just enter the area and the width of each piece.

Pool Volume

Gallons of water

Calculate how many gallons of water your pool holds — for rectangular, round and oval pools — from the size and depth, with litres, cubic feet and fill time.

Gravel

Driveways & paths

Estimate how many cubic yards and tons of gravel you need for a driveway, path or drainage bed.

Sand

Paver base & fill

Estimate how many cubic yards and tons of sand you need for a paver base, sandbox, pool base or backfill — from the area and depth.

Aggregate

Base & backfill

Estimate the cubic yards and tons of aggregate — gravel, crushed stone or base rock — for a driveway, base or backfill.

Stone

Patios & drainage

Work out how many cubic yards and tons of stone you need for a driveway, walkway, patio base or drainage bed.

#57 Stone

Driveways & drains

Estimate the cubic yards and tons of #57 stone for a driveway base, drainage, or concrete aggregate.

Pea Gravel

Patios & play areas

Estimate the cubic yards and tons of pea gravel for a patio, path, dog run or play area.

Board Feet

Hardwood lumber

Calculate board feet of lumber from thickness, width and length, and price out a hardwood order.

Doyle Log Scale

Board feet in a log

Estimate the board feet of lumber in a log with the Doyle log rule from its small-end diameter and length, and price the timber.

Timber Value

Standing timber worth

Estimate the value of standing timber from its board-foot volume and a stumpage price, with an optional value-per-acre breakdown.

Angle Cut

Miter & saw angles

Find the miter angle for each piece and the miter-saw setting to join two boards at any corner — square or odd-angled.

Paint

Walls & rooms

Work out how many gallons of paint you need for a room based on wall area and number of coats.

Drywall

Walls & ceilings

Estimate the number of drywall sheets, plus joint compound and screws, for a room's walls and ceiling.

Fence

Posts & pickets

Estimate wood fence posts, rails, pickets and concrete from total length, height and post spacing — pick a privacy, picket or shadowbox style, with gates and waste.

Chain Link

Pet & security fence

Estimate chain-link fence materials — terminal and line posts, top rail, mesh fabric, tension bands, caps, ties and concrete — from total length, height, corners and gates.

Roof Pitch

Pitch, angle & slope

Convert roof rise and run into pitch (x-in-12), the roof angle in degrees, grade percentage and the slope multiplier, plus rafter length.

Rafter Length

Common rafter & cuts

Calculate common rafter length from your roof span and pitch — line length, overhang, total board length, the plumb and seat cut angles, the birdsmouth depth, and how many rafters to buy.

Roofing

Shingles & squares

Calculate roofing materials from your roof's footprint and pitch — shingle bundles, squares, underlayment, drip edge, starter, ridge cap and nails.

Siding

Squares, boxes & cost

Calculate how much siding you need in squares, plus the boxes, planks or panels to order — from your wall perimeter, height, gables and openings. Works for vinyl, fiber cement, wood lap and board & batten.

Cost Calculator

Project budgets

Free construction cost calculator: estimate the cost to build by square foot — new homes, additions, garages, decks and remodels — with a materials-vs-labor split and a budget range.