Home Improvement

Figure out how much paint, stain, concrete, soil or stone a job needs before you buy. Enter your measurements and get quantities and cost estimates.

152 free tools in this category. See every tool on Lelifi.

• ADU Cost CalculatorCalculate accessory dwelling unit construction costs for detached suites, garage
• Acreage CalculatorTurn length and width in feet, yards or meters into acres, square feet and hecta
• Aggregate Cost CalculatorEstimate the cost of gravel, crushed stone, or sand by converting project dimens
• Air Conditioner Room Size & BTU CalculatorCalculate the exact air conditioner BTU rating needed for your room size based o
• Aluminum Fence Cost CalculatorCalculate aluminum fence installation costs by linear feet, height, and grade. C
• Asphalt CalculatorTurn length, width and compacted thickness into tons of hot mix asphalt, cubic y
• Awning Cost CalculatorEstimate installed awning cost for retractable, stationary, and window styles. P
• Bathtub vs Shower Footprint CalculatorCompare a bathtub and a shower by floor space. Enter both footprints to see the
• Bleach Dilution CalculatorMix the right bleach solution for any job: ounces, tablespoons and cups per gall
• Block Mortar CalculatorFind out how many 80 lb bags of mortar a block wall needs. 100 standard 8x8x16 b
• Board Footage CalculatorTurn thickness, width, length and piece count into board feet, add a waste allow
• Board and Batten Layout CalculatorEnter wall width, batten width and a target gap to get the batten count, the exa
• Board and Batten Siding CalculatorBoard and batten siding calculator: get board and batten counts, linear feet, ho
• Board on Board Fence CalculatorWork out boards, posts and rails for a board-on-board fence. Enter the run lengt
• Borax Ant Killer CalculatorMix borax ant bait at a safe, low concentration. Enter the batch size you want a
• Brick CalculatorWork out how many bricks a wall needs from its length, height, brick size, morta
• Cabinet Door CalculatorSize cabinet doors for any opening: enter width, height, overlay and door count
• Carpet CalculatorFree carpet calculator: enter your room sizes to get square feet, square yards a
• Carpet Removal Cost CalculatorEstimate carpet and padding removal costs by square foot, attachment type, stair
• Carpet Shampoo Dilution CalculatorCarpet shampoo dilution calculator: enter your machine tank size and cleaning ar
• Carport Cost CalculatorEstimate carport cost by size, material, foundation, roof style, labor, and perm
• Ceiling Paint CalculatorCeiling paint calculator: enter your room's length and width to see the square f
• Cement Pad Cost CalculatorPrice a concrete pad for an AC unit, generator, hot tub or shed: volume in cubic
• Clapboard and Lap Siding CalculatorCount clapboard or lap siding boards for any wall: enter size, openings, exposur
• Cleaning Solution Dilution CalculatorPick the job, the bottle size and your concentrate price to get the ounces of cl
• Compost CalculatorWork out your compost carbon to nitrogen ratio. Add your greens and browns and s
• Concrete Block CalculatorEnter wall size, openings and block type to get the concrete blocks you need, pl
• Concrete Block Fill CalculatorEstimate grout volume and 80 or 60 lb bags for concrete block core fill. Full or
• Concrete CalculatorEnter length, width and thickness to get cubic feet, cubic yards and the count o
• Concrete Driveway Cost CalculatorEstimate a poured concrete driveway: $6 to $18 a square foot by finish, plus tea
• Concrete Reinforcing Mesh CalculatorWork out how many sheets or rolls of concrete reinforcing mesh a slab needs, wit
• Countersink Depth CalculatorFind the exact countersink depth for any flat head screw. Enter head and pilot d
• Cubic Yard CalculatorConvert length, width and thickness into cubic yards in one step, then see how m
• Curtain Cost CalculatorWork out fabric yardage and the full cost of custom curtains: face fabric, linin
• DIY Shed Cost CalculatorEstimate DIY shed cost by size: 120 square feet at $55 per square foot is $6,600
• DIY Weed Killer CalculatorMix vinegar, salt and dish soap for the exact area you need to spray, see the fi
• Dawn Powerwash Recipe CalculatorDIY Dawn Powerwash refill recipe: enter your bottle size and get the exact table
• Deck Board Spacing CalculatorCalculate deck board spacing, uniform gap size, and board count. Plan for wood s
• Deck Refinishing Cost CalculatorCompare sanding and re-staining, new wood boards and a composite swap. Get the c
• Deck Stain CalculatorFree deck stain calculator: enter your deck size, coats and stain type to get th
• Dehumidifier Size CalculatorSize a dehumidifier by square feet, dampness and temperature. See the pints per
• Demolition Estimate CalculatorEstimate demolition cost per square foot for light, standard and heavy structure
• Dishwasher Cost CalculatorSee what each dishwasher load costs. Enter your energy use, water use and electr
• Door Header Size CalculatorSize a door header from the rough opening: add 2 inches for shims and 3 for jack
• Doorway Clearance CalculatorCheck a doorway against ADA clear-width rules. Enter the door size, threshold an
• Drywall CalculatorWork out drywall sheets, joint compound, tape and screws for any room. A 12 by 1
• Energy Cost CalculatorCompare electricity, natural gas, propane and heating oil in dollars per MMBtu,
• Epoxy Flooring Cost CalculatorCalculate garage and basement epoxy flooring costs per square foot, including co
• Excavation Cost CalculatorEstimate excavation cost by cubic yard: dig volume, soil hauling off site, impor
• Exterior Paint CalculatorFree exterior paint calculator: enter your house perimeter and wall height to ge
• Fence CalculatorEnter the run length, height and picket layout to get the posts, pickets, rails
• Fence Post Depth CalculatorFence post depth calculator and guide: the one third rule, the 6 inch frost line
• Fence Stain CalculatorFree fence stain calculator: enter your fence length, height, coats and stain co
• Firewood CalculatorWork out how many cords of firewood you need to heat your home all winter. Enter
• First Frost Date by ZIPEnter your ZIP or USDA hardiness zone to estimate your first fall frost date, wi
• Floor Joist CalculatorCheck floor joist spans from the 2021 IRC table: 2x8 to 2x12 at 16 or 24 inch ce
• Floor Replacement Cost CalculatorPrice a floor replacement by material, room size, tear-out and subfloor prep. Se
• Flooring CalculatorMeasure your room, add the right waste factor, and see the square feet to order,
• Framing CalculatorCount studs at 16 or 24 inches on center, add corners and openings, and turn 72
• French Drain CalculatorSize a French drain before you dig: enter trench length, width and depth to get
• Furnace Size CalculatorWork out what size furnace your house needs. Enter square footage, DOE climate z
• Furniture Fit CalculatorCheck whether a sofa, dresser or fridge fits through your door. Enter the openin
• Gambrel Roof CalculatorEstimate gambrel roof area, shingle bundles, underlayment, rafter lengths and co
• Generator Power and Sizing CalculatorGenerator sizing calculator: total running and starting watts for your outage lo
• Generator Size CalculatorAdd up running watts, size the surge for your biggest motor, and get the generat
• Grass Seed CalculatorWork out how many pounds of grass seed your lawn needs for new seeding or overse
• Gravel CalculatorEnter your area, depth and stone type to get cubic yards, tons, bag counts and c
• Grout CalculatorEnter tile size, joint width and depth, and square footage to see how many pound
• HVAC Operating Cost CalculatorEstimate what your air conditioner and furnace cost to run per hour, month and y
• Heat Pump Operating Cost CalculatorCalculate annual heating and cooling costs for a heat pump. Compare HSPF2 and SE
• Herbicide Mixing CalculatorTurn a label rate and spray volume into the exact herbicide per gallon, the prod
• Home Battery Storage Cost CalculatorCalculate home battery storage costs including LFP vs NMC chemistry, inverter ba
• Hot Tub Cost CalculatorAdd up the real cost of a hot tub: the $6,000 purchase, about $80 a month for el
• House Demolition Cost CalculatorEstimate house demolition costs by square footage, foundation type, abatement an
• How Many Solar Panels Do I Need?Solar panel calculator: enter yearly kWh, panel wattage and sun hours to see how
• How Much Paint for a RoomEnter your room size, coats and openings to see exactly how many gallons of pain
• Insulation CalculatorFind out how much insulation to add to your attic. Enter your area, climate zone
• Irrigation System Cost CalculatorPrice a lawn sprinkler system by zone. A 5 zone system on 6,000 square feet runs
• LED Savings CalculatorSee what swapping to LED bulbs saves you a year, how many months until the bulbs
• Laundry Detergent CalculatorWork out how much laundry detergent one load needs from your washer type, load s
• Lawn Fertilizer Calculator: NPK Rates and Spreader SettingsCalculate exact fertilizer bag weight, nitrogen application rates, and spreader
• Lawn Mowing CalculatorPrice a lawn cut in seconds: enter square footage, add slope and obstacle time,
• Leaky Faucet Drip CalculatorCount your drips per minute and see the gallons a leaky faucet wastes a day and
• Lumber Weight CalculatorEstimate lumber weight by species, size and moisture: how much a 2x4 or a whole
• Marble Flooring Cost CalculatorEstimate marble flooring costs per square foot, including stone materials, setti
• Material Cost CalculatorPrice a materials list with a waste factor, box or bundle rounding, sales tax an
• Metal Roof Cost CalculatorPrice a metal roof in seconds: enter your roof area, pick corrugated or standing
• Mulch CalculatorEnter bed size, shape and depth to get cubic feet, cubic yards, bags of mulch an
• Mulch Depth CalculatorMulch calculator: enter your bed size and depth to see cubic feet, cubic yards,
• Mural Cost CalculatorEstimate a painted mural by wall size, detail level, surface prep, design fee, l
• Nitrogen Fertilizer CalculatorWork out how much fertilizer to spread on your lawn. Enter the area, the nitroge
• Overseeding CalculatorOverseeding calculator: enter your lawn size and grass type to get the pounds of
• Paint Cost CalculatorPaint cost calculator: enter your room size, number of coats and price per gallo
• Paint Coverage CalculatorFind out how many gallons of paint a room needs. Enter the walls, subtract doors
• Patio Cover Cost CalculatorEstimate patio cover costs across aluminum, wood, and vinyl materials. Compare s
• Paver CalculatorEnter your patio size and paver dimensions to see how many pavers you need, incl
• Paver Layout Pattern CalculatorEstimate pavers, pattern waste, area, and base materials for herringbone, runnin
• Pea Gravel CalculatorWork out how much pea gravel your project needs. Enter length, width and depth t
• Plywood CalculatorWork out how many 4x8 plywood sheets your floor, wall or shed needs: area divide
• Pool Removal Cost CalculatorEstimate pool removal costs for partial fill-in or complete demolition. Compare
• Pool Shock CalculatorWork out how much pool shock to add: enter gallons and chlorine readings to get
• Pool Volume CalculatorEnter your pool's length, width and shallow and deep end depths to get gallons,
• Post Hole Concrete CalculatorPost hole concrete calculator: enter hole diameter, depth and post size to see c
• Potting Soil CalculatorFind out how much potting soil your pots and planters need. Enter the size and g
• Propane Tank Life CalculatorEnter your tank size, fill level and appliance BTU rating to see how many hours
• Propane vs Electric Heat CostCompare propane and electric heating costs in dollars per million BTU. Enter you
• Rafter Length CalculatorEnter the building span and roof pitch to get the common rafter length with the
• Raised Bed Soil CalculatorFind the cubic feet of soil a raised bed needs from its length, width and depth,
• Rebar Material CalculatorCount rebar for a concrete slab: enter size and grid spacing to get bar counts,
• Rebar Weight CalculatorTotal rebar weight from bar size, length and count: 1.043 lb per foot for #5, wa
• Retaining Wall CalculatorSize a block retaining wall from its length and height: block count, gravel behi
• Rewire Cost CalculatorEstimate a whole house rewire by square foot, with the panel upgrade, new circui
• River Rock CalculatorEnter your bed size and depth to get the cubic yards, cubic feet, tons and bags
• Roof Pitch CalculatorFree roof pitch calculator. Enter rise and run, a pitch, or an angle to get the
• Roofing CalculatorTurn your roof footprint into shingle squares and bundles: enter length, width a
• Roofing Labor Cost Per Square CalculatorEstimate roofing labor per square. Crew hours times a loaded rate from BLS roofe
• Room Size CalculatorTurn length and width into square feet, then get paint gallons and cooling BTU f
• Round Pool Volume CalculatorEnter your round pool's diameter and shallow and deep end depths to get its volu
• Roundup Mixing CalculatorWork out how much glyphosate concentrate goes in your sprayer. Enter your label
• Sand CalculatorEnter length, width and depth to get sand volume in cubic feet and yards, weight
• Sandbox Sand CalculatorWork out how many pounds or bags of play sand your sandbox needs. Enter the leng
• Seed Germination Time ChartFree seed germination chart: days to sprout, the soil temperature each vegetable
• Seed Starting Date CalculatorSeed starting date calculator: enter your last frost date and pick a crop to see
• Septic System Cost CalculatorEstimate the installed cost of a new septic system: tank, drain field sized by s
• Shower Cost CalculatorShower cost calculator: see what one shower costs in water and heat, with monthl
• Sod CalculatorWork out how many square yards and pallets of sod your lawn needs, with a waste
• Sod Weight CalculatorEstimate sod weight in pounds and tons from your lawn size, with rolls, slabs an
• Sod vs Seed CalculatorCompare the cost of sod and grass seed for your lawn. Enter the square footage,
• Space Heater Cost CalculatorSee what a 1,500 watt space heater costs per hour, day and month at your electri
• Spray Foam Insulation Cost CalculatorEstimate spray foam insulation cost from square footage, depth and foam type. Op
• Sprinkler Run Time CalculatorWork out how long to run each sprinkler zone. Enter your precipitation rate and
• Square Foot Garden CalculatorPlan a square foot garden bed: enter your bed size and crop to get plants per sq
• Square Footage CalculatorWork out square feet for a room, an L shape, a circle or a triangle, add a waste
• Square Inches CalculatorFind square inches from length and width, convert to square feet or centimeters,
• Stair CalculatorTurn a total rise into equal risers and treads, get the total run, stringer leng
• Stair CalculatorEnter your total rise to get the number of steps, exact riser height, tread dept
• Stud Spacing CalculatorCount the studs a wall needs at 16 or 24 inches on center, add corners and openi
• Sunroom Cost CalculatorEstimate a sunroom addition by size and type, add foundation, HVAC, electrical a
• Tile Adhesive CalculatorWork out how much thinset mortar you need for a tile job. Enter the area, trowel
• Tile CalculatorEnter the room and tile size to get how many tiles and boxes to buy, with a grou
• Tree Height CalculatorEstimate tree height without climbing: use the shadow ratio or the 45 degree ang
• Tree Removal Cost CalculatorEstimate tree removal cost by height, trunk diameter, and hazard level. See stum
• Wall Area CalculatorAdd up wall square footage for any room, subtract doors and windows, and include
• Wallpaper CalculatorEnter room size, ceiling height and pattern repeat to get the number of wallpape
• Washer Load Size CalculatorConvert washer drum size in cubic feet to pounds of dry laundry, see the 80 perc
• Water Heater Size CalculatorWork out what size water heater your home needs. Enter your household size and h
• Welding Cost CalculatorPrice a weld per foot from deposited metal, filler, gas, power, labor hours and
• When to Aerate LawnWhen should you aerate your lawn? Get month windows for cool-season and warm-sea
• When to Apply FertilizerWhen to apply fertilizer: nitrogen rates and month by month feeding windows for
• When to Plant Tomatoes by ZoneFind when to plant tomatoes by zone and last frost date. Get safe transplant win
• Whole House Fan Size CalculatorWork out what size whole house fan you need. Enter your home size and ceiling he
• Window AC Size CalculatorFind the right window air conditioner size. Enter your room's square footage and

Home projects go wrong at the checkout more often than at the workbench. Buy too little stain and you make a second trip mid job, where the color may not match. Buy too much concrete and you are storing 80-pound bags in the garage for years. These calculators turn your measurements into the amount to buy before you leave the store.

Why the label coverage number misleads

Every gallon of stain prints a coverage figure that assumes smooth, dry wood and a thin coat. A real deck is rough and gray and drinks more. A semi-transparent stain claims 250 square feet per gallon on smooth wood, drops to about 225 on weathered wood, and falls to 175 on new pressure-treated lumber. A 12 by 16 foot deck is 192 square feet of floor, plus about 40 square feet for railing and 20 for steps, so 252 square feet over two coats on weathered wood is closer to 2.5 gallons than the 2 the label suggests.

• Concrete: post holes take bags by weight, so a hole that needs 1.5 cubic feet is three 80 lb bags, or five 60 lb bags.
• Soil and rock: pots and beds are sold by dry quarts and cubic yards, and depth drives the number.
• Carpet: add a waste allowance for seams and cuts, because rooms are not perfect rectangles.
• Roof pitch: enter rise and run to get the X:12 figure, the angle in degrees and the slope percentage.

Add a small cushion for waste, then buy one extra unit you can return. It beats running short.