Free · No sign-up · Metric and imperial
Construction calculators
Work out the materials for a job: concrete for a slab, bricks and mortar for a wall, plaster, paint, tiles, steel and stair dimensions. Every calculator shows its working, cites its constants and works in metric or imperial units.
10 calculators shown
Concrete and cement
Volumes, premix bags and site-mix materials.
Bricks, mortar and plaster
Bricks for a wall, mortar, render and gypsum plaster.
Paint and tiles
Paint, primer, tiles, grout and adhesive.
Steel and stairs
Rebar weight and mesh quantities, stair geometry.
Cost and estimating
Whole-building budgets and a bill of quantities.
Calculators that work together
Each calculator passes its result to the next one, so a wall or a slab can be measured once and carried through to every material it needs.
- Building a wallBrick calculatorPlaster calculatorPaint calculatorBricks and mortar for the wall, then plaster on the wall area, then paint on the plastered area.
- Pouring a slabConcrete calculatorCement, sand and aggregate calculatorRebar calculatorThe volume to order, the cement, sand and aggregate to mix it, then the steel mesh for the same slab.
How these calculators work
They turn dimensions into quantities with published formulas and constants, and show every step, so you can check the answer by hand.
- Shown working. Each result lists the formula with your numbers in it, step by step.
- Sourced constants. Brick sizes, bag yields, densities, coverage rates and stair limits come from standards, trade bodies and manufacturers’ data sheets, listed on each page. Where practice varies, the value is an editable setting.
- Your units and your region. Switch between metric and imperial at any time; region presets set local brick and bag sizes without hiding the numbers.
- No guessed prices. Costs appear only for prices you enter.
- Share and print. Copy a link that reopens the same calculation, or print the inputs and results.
The calculators estimate quantities for ordering. They don’t replace a structural design, a mix design or approval of your plans.
Guides for estimating and buying materials
- Construction material tracking: how to stop losing cement, steel and bricks on siteA practical construction material tracking method for any site: seven checkpoints from demand to payment that stop cement, steel and brick losses.
- Construction material procurement process: every step from site request to paid billThe construction material procurement process step by step: plan order dates, approve requests, compare quotes, issue the PO, receive, match the bill and pay.
- How to estimate construction costs: a step-by-step guide with 10 practical tipsHow to estimate construction costs step by step: quantity takeoff, unit costs, contingency and markup, plus 10 estimating tips that protect your margin.
- House construction checklist for Pakistan: grey structure to finishingA phase-by-phase house construction checklist for Pakistan: approvals, excavation, foundation, grey structure, finishing and handover, with timelines.
Frequently asked questions
Are these construction calculators free?
Yes. There's no sign-up and no limit. The calculations run in your browser and we don't store what you enter. If you copy a share link, your inputs are written into that link's address.
How accurate are construction material calculators?
The geometry is exact for the dimensions you enter. Material quantities depend on assumptions such as the dry-volume factor, joint thickness and wastage, so each calculator shows those values, lets you change them and explains where the defaults come from. Treat results as an estimate for ordering, not as a structural design.
Can I use metric and imperial units?
Yes. Every calculator switches between metres and millimetres and feet and inches, and shows volumes in m³, cubic feet and cubic yards. Region presets for the US, UK, Australia, India, Pakistan and the Gulf set the usual brick size, cement bag, paint coverage and, where a national code applies, stair limits.
Do the calculators include prices?
Only the prices you enter. Material prices change by city and by week, so the calculators never guess them; type in your local prices and each result adds up the cost.
How do I estimate the cost of building a whole house?
Use the construction cost estimator. It budgets a building from its covered area and a cost per square foot or square metre for your country, or prices a full bill of quantities item by item.
Construction cost estimator →Can I share or print a calculation?
Yes. Copy link saves every input in the address, so whoever opens it sees the same result. Print gives a one-page sheet of the inputs and results, which you can also save as a PDF from the print dialog.
From quantities to a project you can track
Aaghaz360 connects estimates, purchase orders, site stores and wages for each project.