How many blocks for a two-storey villa? A worked estimate
Estimate villa blocks from wall lengths, heights and openings, with a two-storey example and a purchase checklist you can review with your contractor.
BEFORE THE FIRST MATERIAL ORDER
Building material
calculators.
Estimate concrete blocks, cement and sand for plaster, tile cartons, and paint litres for your home in Saudi Arabia. Measure your space and turn the quantities into a practical buying list.
Four free calculators. No account. Assumptions you can check.
FROM THE QUANTITY NOTEBOOK01 / TILES
A 4 × 5 metre room
15cartonsStraight lay. 7% waste. 1.44 m² per carton.
01 / THE CALCULATORS
From the first block to the final coat.
Enter the measurements. Check the assumptions. Get your quantities.
01
Wall constructionBlock calculator
Calculate concrete blocks for walls and boundary walls after deducting openings. Compare actual and nominal block sizes, mortar joints and waste before ordering.
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02
Surface preparationPlaster calculator
Estimate cement bags and sand for wall and ceiling plaster from area, thickness and mix ratio. Compare quantities per 100 m² and understand ready-mix plaster.
Open calculator
03
Floors and finishesTile calculator
Calculate ceramic and porcelain tiles for floors and walls, with actual carton coverage, cutting waste and skirting. Includes a 4 × 5 m room example.
Open calculator
04
The final finishPaint calculator
Estimate paint litres and cans for room walls and ceilings. Deduct doors and windows, set the number of coats, and enter your paint coverage and pack size.
Open calculator
Results estimate buying quantities, not construction specifications. Confirm with your contractor or engineer.How are quantities calculated?
START WITH THE RIGHT MEASUREMENTA good estimate starts
A good estimate starts
before the calculator.
A material order starts with a few measurements, but the details matter. Count a wall twice, use the wrong carton coverage or forget which ceiling is included, and a precise-looking total can describe the wrong job. KSA Home Calc helps you turn those measurements into a quantity you can explain.
Start with the material you are buying. Each calculator shows its working, lets you change the assumptions and gives you a result to review with your contractor or supplier. Arabic is the main version; the English pages use the same metric measurements and calculation methods.
Read our method and its limits02 / THE REFERENCE SHEET
What you measure. What you buy.
Measurements and purchase units are different. Keep this reference handy.
| MATERIAL | MEASURE | BUY IN | DEFAULT WASTE | CHECK BEFORE ORDERING |
|---|---|---|---|---|
| Blocks | Net wall area, counted once | Whole blocks | 5% starting allowance | Actual face size and whether the joint is already included |
| Plaster | Each finished face × thickness | Cement bags + sand in m³ | 5% starting allowance | Thickness, volume ratio and the material system |
| Tiles | Floors and walls using one product | Whole cartons | 7% straight / 10% diagonal or staggered | Actual m² per carton, cuts and separate skirting |
| Paint | Net surfaces × coats | Litres and whole cans | 10% starting allowance | Coverage per coat and actual pack capacity in litres |
Waste allowances are editable starting points, not fixed specifications for every product or project.
03 / READ BEFORE YOU BUY
All building guidesThe questions that come up on site.
10, 15 or 20 cm blocks: read the size before counting
Understand block thickness, face dimensions and mortar joints, and see why three different thicknesses can give the same piece count.
How many tile cartons for a 4 × 5 m room?
A 20 m² room can need 15 or 20 cartons of the same tile size. Follow the area, waste and carton coverage calculation before placing an order.
Tile waste allowance: straight, diagonal and staggered layouts
Compare tile waste assumptions using one 20 m² room, and understand how cuts, carton rounding and skirting affect the quantity to buy.
How much paint for a bedroom? Litres and cans explained
Work through a 4 × 4 m bedroom with doors, windows and an optional ceiling, then convert the paint requirement to actual litre-sized packs.
How many cement bags for 100 m² of plaster?
Calculate cement and sand for 100 m² of plaster and see how thickness, volume ratio and estimating assumptions change the material requirement.
How to calculate wall area for painting from room dimensions
Calculate wall square metres from room length, width and height, deduct doors and windows, and separate the ceiling before estimating paint litres.
Premixed plaster bags vs cement bags: quantity calculation
Calculate ready-mix plaster bags from kg/m²/mm consumption and compare a 50 m² example with site-mixed cement and sand without confusing the bag types.
Bathroom tile quantity: wall and floor area to cartons
Work out tiles for a 3 × 2 m bathroom, deduct its door, convert tile sizes to square metres and keep separate wall and floor products in the order.
Boundary wall block quantity with gate and column deductions
Estimate blocks for a boundary wall from masonry lengths and heights, deduct its gate without double-counting columns, and separate plaster and cost.
05 / FROM THE JOURNAL
Explore the journalIdeas to build on.
Thoughtful reads on materials, measurements and the decisions behind a better build.
The journal is temporarily unavailable.
Measure the work, not just the size of the home
A 200 m² floor plan is not 200 m² of every material. Blocks follow wall length and height, plaster follows each face being finished, tiles follow the selected floors and walls, and paint follows the surfaces receiving one product. Treat these as separate measurements even when they come from the same drawing.
Keep a simple schedule by room or wall and mark what each entry includes. A shared partition is counted once for blocks but may have two plastered faces. Door and window openings need to belong to a measured wall before they can be deducted. This small amount of organisation makes the final quantities much easier to check.
Match the result to the package you will buy
A tile size does not identify its carton coverage. Four tiles measuring 60 × 60 cm cover 1.44 m², while three cover 1.08 m². For a 20 m² floor with 7% waste, those packages produce orders of 15 and 20 cartons respectively. Both supply 21.6 m²; the difference is the number of pieces in the pack.
Paint needs the same attention. A supplier may call a 3.6 L pack a gallon, but that label is not a universal volume conversion. Read the litre capacity on the actual product. For cement, check the bag weight; for blocks, record the full product dimensions instead of relying only on a thickness label.
Give every allowance a clear purpose
Waste covers the estimated effect of cuts, breakage and handling. It is different from the surplus created by rounding up to a whole carton or can, and different again from a deliberate repair reserve. Keep those decisions visible so an allowance is not added twice when the order moves from homeowner to contractor to supplier.
The starting percentages are adjustable examples. A tile layout with many unusable cuts may need a different allowance from a simple room; a paint job may need a different coverage input rather than a larger waste percentage. Change the assumption that explains the work, then ask the installer to review it.
Use the worked example as a check
Each tool has a calculation you can follow from measurements to purchase units. Try it once to understand the fields, then replace its numbers with yours. The guides explain the practical differences that commonly change an order, including block joints, two-sided plastering, carton sizes, skirting and paint coats.
When someone gives you a different estimate, compare scope and assumptions before comparing totals. A missing ceiling or different plaster thickness can explain the gap. Save or print the reviewed calculation with the product details so later changes have a clear reference.
Before sending a quantity to the supplier
Make one purchase line for each actual product. Combine rooms using the same item before rounding when practical, and keep different colours, finishes and specifications separate. A surplus of one material does not resolve a shortage of another, even when both are measured in square metres.
- Confirm measured surfaces and opening deductions with the installer.
- Check product dimensions, coverage and package capacity.
- State the waste already included and any separate reserve.
- Review whole-unit quantities and the materials excluded from the calculation.
EDITORIAL NOTE
Prepared by the KSA Home Calc team. Content and defaults await professional review before launch. Updated: .
Can I use these calculators for a complete house?
Yes, by entering the relevant walls or rooms and grouping each material by product. The four tools cover defined quantities, not a complete construction bill; other materials and project details need a separate takeoff.
Are the default values verified specifications?
No. They are visible, editable estimating assumptions. Match them to the selected product and project, and confirm them with your contractor or engineer. Local specialist review of the site's draft content remains pending.
Do I need an account, and can I share a result?
No account is required. Calculations run in your browser. You can print a result or share a link containing the calculation values; review those values before sharing because anyone with the link can see them.