Measure your rooms
Add each room with its shape and sizes in feet or metres (12, 12'6" and 3.8 m all work), or start from a 1, 2 or 3 BHK example and change the sizes. Doors and windows are taken off the walls.
HomeCalcFree Home and Property Calculators
Measure your rooms once in feet or metres, then work out the paint, tiles, cement, sand and bricks to buy, in the tins, boxes and bags shops sell. Turn a super built-up area into carpet area with the real price per square foot, convert guntha, cent and acres, plan a renovation budget and check the rent you can afford. Everything is worked out in your browser, and nothing you type is uploaded.
Your rooms
Measure each room once. Paint, wallpaper and tiles can then work out all of them together, and the floor area adds up to your carpet area.
Paint and wallpaper
How much paint, primer and putty a room or the whole home needs, and which tins to buy. Or the number of wallpaper rolls.
Tiles and flooring
Tiles laid out on your floor or wall, cuts included, with the boxes to buy, skirting, adhesive or mortar, and grout.
Cement, sand and bricks
Concrete for slabs, footings, columns, beams and stairs; brick and block walls; plaster. In bags, cubic feet, brass and tonnes, the way they are sold.
Property area and price
Carpet, built-up and super built-up area from any one of them, what you really pay for each square foot you can use, and land units.
Renovation budget
Every item with its quantity and rate, a buffer for surprises, what you have paid and what is still to pay. The other calculators can add their shopping lists here.
Rent you can afford
The most rent your income carries after loans, savings and living costs, and whether a flat you saw fits, with the cash you need to move in.
Shortcuts, outside a text box: 1 to 7 open the seven calculators, U switches feet and metres and ? opens the help.
How to Use HomeCalc: Step-by-Step
Work out the paint
Pick your rooms or type one, choose the paint and type the coverage printed on the tin. You get the litres, the tins to buy, and primer and putty if the walls need them. Or the wallpaper rolls.
Lay out the tiles
Choose a tile size and a pattern. HomeCalc draws the tiles on your floor with the cut pieces, and gives the boxes, skirting, adhesive or mortar, and grout.
Cement, sand and bricks
Type the slabs, footings, columns, beams or stairs you are casting, a brick wall or the plaster. You get the bags of cement and the sand and aggregate in cubic feet, brass and tonnes.
Check the area and price
Type the super built-up area and the price from the brochure to see the carpet area and what each square foot you can use really costs, with GST, stamp duty and registration. Convert guntha, cent and acres.
Plan the budget and the rent
Send each shopping list to the budget with Add to budget, record payments and save a spreadsheet. Check the rent your pay carries and the cash you need to move into a flat.
Why Use HomeCalc?
📏 Rooms measured once
Type your rooms in one place and the paint, wallpaper, tile and plaster calculators can use some or all of them at once. Change a size and every answer follows.
🛒 Lists in the units shops sell
Tins of paint, boxes of tiles, 50 kg bags of cement, and sand and aggregate in cubic feet, brass and tonnes, so the list can go straight to the shop or the supplier.
🔲 Tiles from the real layout
For a rectangular room laid straight, the tiles are counted the way a tiler lays them, with the cut pieces drawn. Centring the pattern can avoid thin strips at the walls.
✏️ Any unit you type
Feet and inches, metres, centimetres, millimetres or a sum such as 10' + 4'6". Areas in square feet, square metres, gaj, guntha or acres, and amounts as 45k, 1.5L or 1.2 cr.
🧪 Figures you can check
Each answer shows how it is worked out. Coverage, the tiles in a box and what a bag of adhesive covers come from the tin, the box or the bag you buy, and the concrete follows IS 456.
🔒 Nothing uploaded
Everything is worked out in your browser and kept in this browser on this device. Save a backup file to move it to another device; Delete everything removes it.
Home Measurements Explained
🏠 Carpet, built-up, super built-up
Carpet area is the floor inside your walls, the figure RERA makes builders state. Built-up adds the outer walls and balconies, and super built-up your share of the common areas. The same price per square foot buys less floor when the loading is high.
🎨 Why tins quote two coats
Indian paint makers print what one litre covers in two coats, because two coats is the usual job. One coat covers about twice that area, so a tin that says 130 sq ft for two coats paints a 130 sq ft wall twice.
🧱 Brass, bags and the 1.54 rule
Sand and aggregate are sold by the brass, 100 cubic feet. Mixed concrete shrinks as the cement and sand fill the gaps in the stones, so the dry materials take about 1.54 times the volume of the wet concrete.
Frequently Asked Questions
Is HomeCalc free, and is anything I type uploaded?
It is free, with no registration and no limit. Like every page on ZeroDataUpload, it is supported by advertising. The sizes, prices and amounts you type are worked out by your browser on your device and never sent to a server. They are kept in this browser's storage so they are there next time; Delete everything, under Settings, removes them.
How much paint do I need for a room?
The walls are the distance around the room times its height, less the doors and windows, plus the ceiling if you paint it. The litres are that area times the coats, divided by what one litre covers in one coat, plus a little extra for spills. Indian tins state the coverage for two coats; HomeCalc starts from 130 sq ft per litre for two coats of interior emulsion, the lower end of a large maker's product sheet, and you type the figure on your own tin. The tins to buy are the cheapest mix of the sizes you list.
How does HomeCalc count tiles?
For a rectangular floor or wall laid straight, it lays the tiles out the way a tiler does: the whole tiles, the cut pieces at the walls, and thin pieces cut several from one tile, and draws the layout. Other shapes and patterns are counted by area with an allowance for cuts: 10% laid straight or as bricks, 15% diagonally and 20% in herringbone. A spare for breakage is added, and the boxes come from the number of tiles printed on the box.
How much cement, sand and aggregate does concrete need?
The dry materials take about 1.54 times the volume of the wet concrete, split by the mix: M20 is 1 : 1.5 : 3. Cement weighs 1,440 kg a cubic metre, so a 50 kg bag is 0.0347 cubic metres. Sand and aggregate are given in cubic feet, brass (100 cubic feet) and tonnes. IS 456 allows concrete mixed by proportion only up to M20, and HomeCalc shows the most water the standard allows per bag.
What are carpet, built-up and super built-up area?
Carpet area is the floor inside the flat's walls, counting the inside walls; under RERA (2016) it is the area builders must state. Built-up adds the outer walls and your balconies. Super built-up adds your share of the lobbies, stairs, lifts and clubhouse, called loading; ANAROCK found it was 40% of the carpet area on average in India's seven largest cities in early 2025. Compare flats by the price per square foot of carpet area.
How much is a guntha, a cent or a ground?
A guntha is 33 by 33 feet: 1,089 sq ft, 121 sq yd or 101.17 sq m, and 40 gunthas make an acre. A cent is a hundredth of an acre, 435.6 sq ft. A ground, used in Tamil Nadu, is 2,400 sq ft. Bigha and marla mean different areas in different states, so HomeCalc leaves them out.
How much rent can I afford?
HomeCalc sets two limits and takes the lower: a share of your take-home pay (30% is a common rule of thumb), and what is left after your loan EMIs, other fixed costs, the savings you want, living costs and the flat's bills. Add the flats you are looking at to see the monthly cost with maintenance, the cash to move in and the rent over three years.