Brick & Block Calculator

Block & Brick Calculator helps you estimate construction materials in seconds — right on the job site, fully offline. It bundles 21 focused calculators for masonry, concrete, aggregate, finishing and geometry, and shows you exactly how every number is worked out.

Most material calculators just hand you a figure. Block & Brick Calculator also shows the formula and the assumptions behind it — the mortar joint, the waste percentage, the unit size — so you can trust the result and explain it to a client or supplier.

WHAT YOU CAN CALCULATE

Masonry
• Concrete blocks (CMU) — with mortar-joint-aware and simple modes
• Bricks — modular, standard, queen, king sizes
• Mortar — by unit count or by volume
• Block fill — concrete to fill hollow cores
• Retaining wall — blocks, base gravel and backfill

Concrete
• Slab — volume and 80 lb bags
• Footing
• Column / tube
• Stairs
• Rebar mesh — sheets and bars for slabs

Aggregate
• Gravel & sand — volume and weight by density
• Soil / topsoil

Finishing
• Plaster / render
• Tile — tiles, boxes and adhesive
• Paint — litres and cans
• Drywall — sheets and screws
• Wallpaper — rolls and strips
• Flooring — area and packs
• Roof — area, pitch and covering

Geometry
• Area — rectangle, triangle, circle, trapezoid
• Volume — box and cylinder

WHY BLOCK & BRICK CALCULATOR

• Transparent results — tap "How is this calculated?" to see the formula and every assumption applied.
• Two modes for blocks and bricks — see both the precise count and the naive area estimate, with an explanation of why they differ.
• Live calculation — results update as you type, no calculate button.
• Waste factor — adjust the over-order percentage from 0 to 20%.
• Openings — subtract doors and windows from wall area.
• Metric and imperial — millimetres, centimetres, metres, inches, feet and yards.
• Save projects and history — keep your estimates and reopen them anytime.
• PDF export and share — produce a clean estimate to send to a client or supplier.
• Cost estimate — add a unit price to get a total.
• Light and dark themes.
• Works fully offline — no account, no internet required to calculate.
• Multiple languages, with more added over time.

BUILT FOR THE JOB SITE

Large, legible numbers and big tap targets make Block & Brick Calculator easy to use outdoors and with gloves on. Dark mode keeps it readable in low light.

A NOTE ON ACCURACY

Block & Brick Calculator provides estimates for planning purposes. Always order a little extra (typically 5–10%) and consult a qualified professional for structural or load-bearing work. Formulas are based on widely used industry references.