Home & construction calculators
Concrete, gravel, paint, tiles, roofing and the running costs of your home.
- 44 calculators
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Areas & materials
Square footage, concrete, gravel, paint and tiles.
Square footage calculatorArea of rooms and plots in sq ft, m², sq yd, acres and more: any shape, feet and inches, cut-outs, waste and cost.Open calculator Concrete calculatorSlabs, footings, columns, stairs and curbs: cubic yards or m³, bags, trucks, cost and mix.Open calculator Concrete footing calculatorStrip, pad, round and bell-bottom pier footings: cubic yards or m³, bags, trucks, wall on footing, steps, digging, gravel, rebar, cost and width from soil bearing.Open calculator Gravel calculatorGravel, stone, sand, or topsoil for any shape: cubic yards or m³, tons or tonnes, bags, truck loads and cost.Open calculator Cubic yard calculatorCubic yards, cubic feet and m³ for any shape: several areas, sloped depth, extra %, weight of soil, sand, gravel, mulch or concrete, bags, truck loads and cost.Open calculator Mulch calculatorMulch for beds of any shape and tree rings: depth by mulch type, settling, top-ups, cubic yards, m³ or litres, bags, weight and whether bags or bulk is cheaper.Open calculator Paint calculatorHow much paint for rooms, walls and ceilings: doors and windows taken away, coats, primer, woodwork and the best mix of tins in litres or gallons, with cost.Open calculator Tile & flooring calculatorTiles, laminate, vinyl or wood planks for one or more rooms: grout gap, waste for the laying pattern, boxes, cost, grout, adhesive, underlay and skirting.Open calculator Grout calculatorGrout in kg, lb and bags from tile size, thickness and joint width: floor and wall areas, cement or epoxy, mosaic sheets, waste, tile count and cost.Open calculator Flooring calculatorLaminate, vinyl plank, engineered wood or carpet for one or more rooms: boxes by coverage or plank count, waste by pattern, carpet roll length and seams, underlay rolls, skirting less doorways and cost.Open calculator Wallpaper calculatorRolls of wallpaper by the drop method: pattern repeat, straight or half-drop match, doors and windows, UK/EU or US rolls, paste and cost.Open calculator Brick & block calculatorBricks or blocks for one or more walls, less doors and windows: half brick, one brick or cavity wall, mortar, cement and sand bags by mix, waste and cost.Open calculator Mortar calculatorMortar for brick and block walls from the joint size: wet volume, cement, lime and sand bags by mix ratio or ready-mixed bags, single or double leaf, waste and cost.Open calculator Concrete block calculatorCMU, cement or hollow blocks for one or more walls, less doors and windows: 8 in CMU or 400 × 200 mm blocks, mortar bags or cement and sand, core fill, rebar and cost.Open calculator Board foot & lumber calculatorBoard feet, cubic feet and m³ for a list of boards: inches, quarters (4/4, 8/4) or mm, nominal or actual sizes, linear feet, waste, cost per board foot, foot or m³, weight and a cut list.Open calculator Rebar calculatorRebar for slabs, footings, columns and beams: bars each way, ties, laps, stock bars of 12 m or 20 ft to buy, weight in kg or lb, cost, chairs, tie wire and a bar bending schedule.Open calculator
Roofs, walls & floors
Roofing and building jobs.
Roofing calculatorRoof area, squares and pitch for gable, hip, shed, gambrel or mansard roofs: shingle bundles, metal sheets or tiles, underlay, ridge caps, drip edge, nails and cost.Open calculator Drywall & plasterboard calculatorSheets of drywall or plasterboard for rooms, walls, gables and ceilings, less doors and windows: tape from the real joints, compound, screws, corner bead, layout drawing and cost.Open calculator Fence calculatorPosts, rails, boards, panels, chain link or wire for any fence: gates, corner and end posts, concrete bags per post hole, screws, a top-view plan and cost.Open calculator Stair calculatorSteps, riser height, tread depth, run, stringer length and angle, headroom and floor opening, with a scaled drawing, stringer cut layout and US, UK, Australia and Canada code checks.Open calculator Deck calculatorDeck boards, joists, beams, posts, footings, screws or hidden clips and railing for a rectangle, L-shape or three-part deck, with a top-view plan and cost.Open calculator Roof Pitch CalculatorRoof pitch from rise and run, span or angle as x/12, degrees, percent and 1:x, with rafter length, cut angles, hip rafter, roof area and minimum pitch by material.Open calculator Stair stringer calculatorCut a stair stringer: risers and treads, framing-square settings, throat, bottom drop, plumb and seat cuts, board length to buy, stringers for the width, a scaled cut drawing and US IRC and UK Part K checks.Open calculator Water tank size calculatorLitres in a round, horizontal, rectangular, cone-bottom, ball or capsule tank, water in it now from the level, the tank size your home needs for your people and days, time to fill and how long it lasts.Open calculator Pool volume calculatorLitres, m³ and US or UK gallons in a rectangle, round, oval, kidney, L-shaped or freeform pool with a shallow and deep end or sloped floor: water weight, fill time, pump turnover, water cost (Gulf tariffs built in) and chemical amounts from the label.Open calculator Pipe volume calculatorLitres, m³ and US or UK gallons in a pipe from its inner diameter or outer diameter and wall: several runs added, water weight, a partly full pipe from the water depth, time to fill, flow speed and the weight of the pipe wall.Open calculator
Heating, cooling & energy
Running costs, sizing and utility bills for your home.
Electricity cost calculatorWhat an appliance costs to run per hour, day, month and year: watts or amps, standby, thermostat on-time, several appliances, peak and off-peak prices, CO₂ and payback on a new one.Open calculator Solar panel calculatorSolar system size in kW, number of panels, roof area, yearly kWh, savings and payback from your use or bill and your peak sun hours, with slab-aware Gulf tariffs, net metering or export, 25-year savings, NPV, CO₂ and a backup battery.Open calculator Solar battery size calculatorHome, solar or inverter battery size in kWh and Ah at 12, 24 or 48 V for hours or days of backup, from daily kWh, your bill or a list of appliances, with LiFePO4 or lead-acid depth of discharge, inverter losses, batteries in series and parallel, inverter size with motor surge and solar panels to recharge it.Open calculator Water heater size calculatorWhat size geyser, hot water cylinder or tank heater you need from your busiest hour (showers, baths, sinks, dishwasher, washer), or the kW and BTU/h a tankless heater needs for the taps running at once: first-hour rating, gas input, amps, heat-up time, energy and cost a day at your price, standby loss, solar collector area and mixing.Open calculator AC size (BTU) calculatorWhat size AC a room needs in BTU, tons and kW: room size and ceiling height, climate, sun, insulation, top floor, windows, people and kitchen, the standard size to buy and its running cost.Open calculator R-value calculatorR-value and U-value of a wall, roof or floor from its layers: insulation, boards, brick, concrete and air films in inches, mm or cm, US and SI units, heat loss in W and BTU/h, yearly heating cost from degree-days and the thickness needed for a target R.Open calculator Lumens calculatorHow much light a room needs: lumens from the room size and a lux or foot-candle target for each room type, how many bulbs, ceiling height and wall colour, LED watts, old-bulb watts, running cost a year and a lux, foot-candle and lumens converter.Open calculator Fuel oil mix calculatorHow much 2-stroke oil to add to your petrol (gas) at 16:1 to 100:1 or any ratio, in mL and fl oz: petrol for the oil you have, total mix, oil %, fixing a wrong mix and a quick table for common cans.Open calculator Rainwater harvesting calculatorLitres or gallons a roof collects from your rainfall per year, month or storm: roof type runoff, first flush, month-by-month balance against your household use, tank size, days of supply and mains water saved.Open calculator Qatar electricity and water bill calculatorYour monthly Kahramaa bill from kWh and m³ for flats, villas, shops, hotels, industry, government and farms, slab by slab, with AC usage estimates, cost per day and two months compared.Open calculator Dubai electricity and water bill calculatorYour monthly DEWA bill from kWh and m³ or gallons for homes, shops and industry: slab by slab, fuel surcharge, meter charges and 5% VAT, with AC usage estimates, cost per day and two months compared.Open calculator Sharjah SEWA bill calculatorYour monthly SEWA electricity and water bill in AED from kWh and gallons (or m³): slab by slab, fuel surcharge and 5% VAT, units left before the next slab, meter readings, AC usage estimates, your own rate, cost per day and two months compared.Open calculator Saudi electricity bill calculatorYour monthly SEC electricity bill in SAR for homes, shops, farms, industry, government and more: the 6,000 kWh bands, 15% VAT, meter readings, AC usage estimates, the heavy consumption tariff, cost per day and two months compared.Open calculator Bahrain electricity and water bill calculatorYour monthly EWA bill in BHD from kWh and m³ or gallons for subsidised Bahraini homes, expats and businesses: slab by slab, kWh left in your slab, AC usage estimates, optional VAT, cost per day and two months compared.Open calculator Oman (Dhofar) electricity & water bill calculatorYour monthly electricity and water bill in OMR with Nama Dhofar Services' published tariffs: primary, additional and Oman citizen (NSS) accounts tier by tier, water in m³ or gallons, meter readings, AC usage estimates, cost per day and two months compared.Open calculator
Renting
Rent rules and costs.
Dubai rent increase calculatorThe most your Dubai landlord can raise the rent on renewal under Decree 43 of 2013: your gap below the DLD rental index average, the band, the new rent cap, a check on the landlord's figure, the 90-day notice date and the cheques.Open calculator Dubai property transfer fee calculatorWhat buying a Dubai home really costs: the DLD transfer fee, admin and title deed fee, trustee office fee, mortgage registration, agent commission with VAT, bank fees and off-plan Oqood fees, with the cash you need upfront and the cost as a % of the price.Open calculator Rent split calculatorSplit rent fairly between flatmates: shared space per person, bedrooms by size, extras like a private bathroom or parking, bills, the deposit and an equal-split check.Open calculator
About the Home & construction calculators
Material calculators for building and DIY jobs: how much concrete, gravel, mulch, paint, tiles, bricks, drywall or rebar to buy, plus roof pitch, stairs, decks and fences. Enter sizes in feet or metres and get the amount in the units you buy in.
Energy tools size an air conditioner in BTU, or a solar system, and estimate electricity costs, lighting and rainwater you can collect. Utility bill calculators follow the official tariffs for Qatar (Kahramaa), Dubai (DEWA), Sharjah (SEWA), Saudi Arabia, Bahrain (EWA) and Dhofar in Oman.
For anything structural or electrical, have the final quantities and sizes checked by a qualified builder, engineer or electrician.