Home & Construction Calculators
Estimate paint, tiles, concrete, drywall and household running costs.
Plan a repair or understand a household bill before you buy materials. These calculators turn room dimensions and appliance data into quantities, costs and waste allowances — with clear assumptions you can adjust.
All Calculators82
Electricity Cost Calculator
Estimate the running cost of an appliance from watts, hours and your tariff.
Paint Coverage Calculator
Estimate paint litres for a wall or room, including coats and doors.
Tile Calculator
Estimate tiles, boxes and waste for a floor or wall.
Concrete Slab Calculator
Estimate concrete volume, cubic yards and bags for a slab.
Drywall Sheets Calculator
Estimate drywall sheets and screws for a wall or ceiling area.
Furniture fit
Check whether a piece of furniture will fit in a room with usable walking clearance.
Car ownership cost
Estimate the full annual cost of owning a car, including fuel, insurance, maintenance and depreciation.
Cooling cost
Estimate the monthly electricity cost of air conditioning from room size, runtime and efficiency.
Heating cost
Estimate seasonal heating cost from home size, climate, fuel type and efficiency.
Pet age
Convert a dog or cat age into an approximate human-age equivalent.
Appliance energy use
Estimate the electricity use and running cost of an appliance from wattage and hours.
Coffee cost
Compare the cost of café coffee with brewing at home over a month and a year.
Daily commute cost
Total daily, monthly and annual commuting costs by car or public transit.
Flooring quantity
Calculate flooring boxes, waste allowance and material cost for a room.
Grocery budget
Turn a weekly grocery budget into per-person, per-meal and annual figures.
Meal cost
Find the cost per serving of a home-cooked meal from ingredient prices.
Paint cost
Estimate paint gallons and total cost from wall area, coverage and coats.
Rent affordability
See rent as a share of gross income and compare it with common affordability guidelines.
Room area
Calculate floor area, perimeter and unit conversions from room length and width.
Subscription cost
Total monthly and annual subscriptions to see the full yearly commitment.
Tile quantity
Work out tile count and boxes from area, tile size and waste allowance.
Utility split
Split a shared utility bill evenly by person or by room.
Wall area
Calculate paintable wall area after deducting doors and windows.
Water bill
Estimate a monthly water bill from usage, volumetric rates and fixed charges.
HVAC tonnage
Estimate the cooling capacity a home needs in tons from floor area and construction.
Rebar
Calculate rebar weight and bar count from total length and bar size.
Roofing shingles
Estimate shingle bundles and squares for a pitched roof.
BTU
Estimate heating or cooling BTU for a single room.
Brick
Estimate the number of bricks for a single-wythe wall.
Cement bags
Estimate cement bags, sand and gravel for a concrete mix.
Concrete block
Estimate concrete blocks and mortar for a block wall.
Concrete footing
Calculate concrete for strip or pad footings.
Flooring planks
Estimate plank count for a laminate or vinyl floor.
Gravel tonnage
Convert gravel volume to cubic yards and tons for a driveway or path.
Grout
Estimate grout weight and bags from tile size, joint width and area.
Insulation
Estimate insulation bags from area and target R-value.
Mortar
Estimate mortar volume and bags for a block wall.
Paint
Calculate paint litres for a room from wall area, ceiling and coats.
Primer
Estimate primer litres for a surface area and porosity.
Sand
Calculate sand volume, weight in tons and bag count for a project.
Tile boxes
Estimate tile boxes and tile count for a floor.
Moving cost
Estimate what a local move costs in truck rental, labor and packing supplies.
Storage cost
Estimate the monthly and total cost of a storage unit for the time you need it.
Thermostat savings
Estimate bill savings from setting the thermostat back for part of the day.
Window film
Work out how much window film to buy and what it costs for a set of windows.
Air filter
Calculate how many filters you need each year and what they cost for a given size and schedule.
Cleaning supplies
Add up what cleaning products cost each month and per cleaning session.
Fence panels
Estimate how many fence panels and posts a run needs and what the panels cost.
Pet food cost
Estimate monthly pet food cost from body weight, activity level and food calorie density.
Plant watering
Build a watering interval and next-date reminder for a houseplant by type, pot size and light.
Carpet quantity
Calculate the carpet area to order and the cost, including a waste allowance.
Ceiling area
Find ceiling area and the paint or tile quantity needed for one or more rooms.
Deck stain
Calculate how much deck stain to buy for a given area and number of coats.
Gas bill
Estimate a gas bill from meter readings, the tariff and a fixed charge.
Gravel
Estimate gravel volume, weight and cost for a driveway, path or bed.
Home maintenance budget
Set aside an annual home maintenance budget based on property value and age.
Internet plan
Compare internet plans by cost per Mbps and total contract cost.
LED savings
Estimate the electricity and money saved by replacing old bulbs with LEDs.
Laundry cost
Break down what each load of laundry costs in energy, water and detergent.
Lawn seed
Calculate how much grass seed to buy for a lawn area and what it costs.
Mulch
Estimate the mulch volume a garden bed needs and how many bags to buy.
Phone plan
Work out the all-in monthly cost of a phone plan across lines, add-ons and taxes.
Pool volume
Calculate the water volume of a rectangular, circular or oval pool in gallons and litres.
Public transit cost
Compare a monthly transit pass with paying per ride and find the break-even point.
Rideshare cost
Estimate a rideshare fare from distance, time, base fee and per-unit rates.
Soil
Find the soil volume needed for raised beds, planters and round pots.
Streaming cost
Add up streaming subscriptions and see the cost over a full year.
Wallpaper quantity
Estimate wallpaper rolls for a room, allowing for doors, windows and pattern waste.
Concrete stairs
Estimate the concrete volume and bag count needed for a straight run of stairs.
Deck boards
Work out how many deck boards and joists a deck needs from its size and board dimensions.
Fence posts and rails
Estimate posts, rails and bays for a straight fence run.
Roof underlayment
Estimate underlayment rolls from roof footprint, pitch and roll coverage.
Siding
Estimate siding panels for a wall after deducting windows and doors.
Carpet area
Calculate carpet area, waste and an approximate material cost for a room.
Concrete column
Estimate concrete volume and bags for round or square columns.
Drywall mud
Estimate joint compound from drywall area and the number of finishing coats.
Joint compound
Estimate joint tape and compound from the number of drywall sheets and coats.
Laminate
Estimate laminate cartons and underlayment rolls for a floor area.
Stucco
Estimate stucco bags for a wall at a chosen total thickness.
Thin-set
Estimate thin-set bags from tile area, trowel size and bag weight.
Topsoil
Calculate topsoil volume and bag count for a garden bed.
Wallpaper rolls
Estimate wallpaper rolls from wall area and roll coverage.
Frequently asked questions
How much extra material should I buy?
A 10% waste allowance is typical for simple layouts. Use 15% or more for diagonal tiles, complex rooms or large-format panels.
Are construction estimates a substitute for a professional quote?
No. They are planning estimates. Structural work, electrical work and permits should be checked by a qualified professional.