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Measure before ordering

Free construction calculators

Estimate bricks, cement, sand, concrete, paint, tiles and other quantities from your measurements. These are planning estimates, not structural designs.

14free calculators100%formulas shown
Recommended starting point

Room Area Calculator

Start by checking the measured area, perimeter and volume.

Start here
A simple decision path

From site measurements to an order quantity

  1. Choose the question that matches your decision.
  2. Replace every example with a label, bill, drawing, product sheet or record value.
  3. Open the formula and check all hidden assumptions.
  4. Save or print the result, then verify the final decision.
Which tool should I use?

Match your question to a calculator

Count bricks for a wallBrick wall Estimate plaster materialsPlaster Estimate concrete quantityConcrete Estimate paintPaint Estimate tiles and boxesTiles
Know before you calculate

Three things to check first

Learn the terms, follow the method, then avoid the most common mistakes.

01
Common terminology

Words you will see

Area
a flat measured surface.
Volume
area with thickness or depth included.
Wastage
an editable allowance for cuts, breakage or handling.
02
Worked example

How the logic flows

For a wall, calculate gross volume, subtract opening volume, divide by the brick module, then apply the visible wastage percentage.

03
Beginner mistakes

Check these first

  • Mixing feet, metres and millimetres.

  • Using gross wall area without subtracting openings.

  • Treating a material estimate as structural design.

Detailed guides

Learn the method

Read the material estimate guide Plan a 1,000 sq ft house budget Plan bricks for a wall Work through a room paint estimate Understand wet and dry volume Browse every guide
Official verification links

Construction standards and building science

These independent government and standards resources help you verify the inputs or decision. Inclusion is not an endorsement.

BIS standard-review searchBureau of Indian StandardsFind the current record for an Indian Standard, including concrete, masonry and reinforcement standards.Open official resource Know Your Standard searchBureau of Indian StandardsLook up an Indian Standard by number or material keyword and check its current record.Open official resource CPWD civil specifications, Volume IICentral Public Works Department, Government of IndiaBrowse public specifications for brickwork, concrete, mortar and reinforced concrete work.Open official resource CPWD civil specification updatesCentral Public Works Department, Government of IndiaCheck current correction slips and technical updates before relying on an older specification.Open official resource Model Building Bye-LawsMinistry of Housing and Urban Affairs, Government of IndiaReview the national model, then verify the building rules adopted by the local authority.Open official resource CPWD technical circularsCentral Public Works Department, Government of IndiaCheck current public-works circulars, specifications and quality-assurance updates.Open official resource
Browse all 72 verified links
All tools

Choose a calculator

Working shownConstructionBrick Wall Calculator

brick count and mortar volume after subtracting openings

Open calculator Working shownConstructionBrick, Cement and Sand Calculator

bricks and mortar materials for a measured wall

Open calculator Working shownConstructionCement and Sand Mortar Calculator

cement bags and sand for a wet mortar volume

Open calculator Working shownConstructionPlaster Calculator

wet volume, cement bags and sand for wall or ceiling plaster

Open calculator Working shownConstructionConcrete Calculator

nominal concrete material quantities for a rectangular element

Open calculator Working shownConstructionRCC Slab Material Estimator

slab concrete and a user-entered engineer-approved steel allowance

Open calculator Working shownConstructionSteel Bar Weight Calculator

steel weight from bar diameter, length and quantity

Open calculator Working shownConstructionTile Calculator

tile count, box count and spares after wastage

Open calculator Working shownConstructionFlooring Calculator

laminate, vinyl or plank flooring units and boxes

Open calculator Working shownConstructionPaint Calculator

room wall and optional ceiling paint volume

Open calculator Working shownConstructionRoom Area Calculator

floor, ceiling, wall area, perimeter and volume

Open calculator Working shownConstructionWater Tank Volume Calculator

rectangular or cylindrical tank capacity in litres

Open calculator Working shownConstructionStaircase Dimension Calculator

stair risers, treads, run and slope geometry

Open calculator Working shownConstructionHouse Construction Cost Calculator

a cost scenario from user-entered area and a locally verified rate

Open calculator
Two-minute explanation

Area, volume and wastage do different jobs

Measure the net area or volume first. Then apply the mix, product coverage and wastage settings. Round up only when you turn the estimate into a purchase quantity.

Common questions

Before you calculate

Why are purchase quantities rounded up?

Pieces, bags and boxes must be bought as whole packages. The calculation keeps precision first, applies the visible wastage setting, and rounds only at the purchase stage.

Can these results replace an engineer?

No. These are early quantity estimates. A qualified architect or engineer must approve structural dimensions, reinforcement, materials, safety and applicable rules.

Which dimensions should I measure?

Use dimensions from the drawing and confirm them on site. Measure openings, thickness, product size, coverage and pack size wherever the selected calculator asks for them.