Home & DIY
Plan home and DIY projects with confidence: estimate paint, flooring, tile, mulch, concrete and other materials, size an air conditioner, and more.
Appliance Energy Calculator
Find what an appliance costs to run from its wattage. Enter watts, hours per day and your rate to see kWh and cost per day, month and year.
Aquarium Volume Calculator
Calculate your fish tank volume in gallons and liters from inside dimensions in inches. Set a fill level to estimate the actual water it holds.
Baseboard Calculator
Estimate linear feet and pieces of baseboard or trim for a room. Enter length and width, subtract doorways, set piece length and add waste.
Board Feet Calculator
Calculate board feet of lumber from thickness, width and length. Enter quantity and price per board foot to get total board feet and project cost.
Brick Calculator
Calculate how many bricks you need for a wall. Enter the wall size and brick size to get wall area, bricks before waste and bricks to buy with waste.
BTU Calculator
Calculate the air conditioner BTU size for a room. Enter the room size and adjust for sun, occupants and a kitchen to find the right cooling capacity.
Concrete Calculator
Calculate concrete for a slab or footing. Enter length, width and thickness to get cubic yards plus 60 and 80 lb bag counts, with a waste allowance.
Deck Calculator
Estimate deck boards, joists and screws for a deck. Enter length and width, set board size, gap and joist spacing, and add waste for cuts.
Deck Stain Calculator
Find how many gallons of deck stain or sealer you need. Enter the deck size, coats and railing length to get the surface area and gallons to buy.
Drywall Calculator
Estimate sheets of drywall for a room, plus screws and joint compound. Enter wall area or room size and height, add the ceiling, and set waste.
Fence Calculator
Estimate posts, sections, rails and pickets for a fence. Enter total length and post spacing, set rails per section and picket width, and add gates.
Firewood Cord Calculator
Calculate how many cords of firewood are in a stack. Enter the length, height and depth to get the stack volume and cords, where a full cord is 128 cu ft.
Flooring Calculator
Find how many boxes of flooring you need for a room. Enter length, width, box coverage and waste to get square footage, boxes and total cost.
Grass Seed Calculator
Find how many pounds of grass seed your lawn needs. Enter the area and choose new lawn or overseeding to get the seed weight at the right rate.
Gravel Calculator
Estimate gravel or aggregate for an area by volume and weight. Enter length, width, depth and density to get cubic feet, cubic yards, pounds and tons.
Insulation Calculator
Estimate bags of insulation for an area. Enter the square footage, or the length and width, set the coverage per bag and add a small waste allowance.
kWh Cost Calculator
Work out the cost of any amount of electricity. Enter kWh and your rate to get the price, plus monthly and yearly totals for daily usage.
Lawn Fertilizer Calculator
Find how many pounds of fertilizer to apply to hit a nitrogen rate. Enter the lawn area, target rate and the nitrogen percent on the bag to get the amount.
LED Savings Calculator
See how much you save by switching bulbs to LED. Enter old and new wattage, bulb count, hours and your rate for yearly and monthly savings.
Mulch Calculator
Find how much mulch you need for a garden bed. Enter length, width and depth to get cubic feet, cubic yards and the number of 2 and 3 cu ft bags.
Paint Calculator
Estimate how many gallons of paint you need for a room or wall. Enter dimensions, coats, doors and windows to get paintable area and gallons.
Paver Calculator
Find how many pavers and how much sand a patio needs. Enter the patio size, paver size and waste to get the paver count and sand in cubic yards.
Plant Spacing Calculator
Find how many plants fill a garden bed at a given spacing. Enter bed length, width and spacing to get plants, rows and columns for square or triangular layouts.
Pond Liner Calculator
Find the liner size for a garden pond. Enter the pond length, width, depth and overlap to get the liner dimensions, area and an estimated water volume.
Pool Chlorine Calculator
Calculate how much chlorine to add to your pool to raise free chlorine by a target ppm. Enter gallons, the ppm rise and product strength for the dose.
Pool Heater Calculator
Calculate the energy and time to heat your pool. Enter gallons, the temperature rise, heater output and efficiency to get BTU, kWh and heating hours.
Pool Salt Calculator
Calculate how much salt to add to reach a target salinity in your saltwater pool. Enter gallons, current ppm and target ppm to get pounds and kilograms.
Pool Turnover Calculator
Calculate your pool turnover time from the pump flow, or the flow rate needed for a target turnover. Enter gallons and one rate to size the pump.
Pool Volume Calculator
Calculate your swimming pool water volume in gallons and liters. Works for rectangular, circular and oval pools with shallow and deep end depths.
Rebar Calculator
Calculate rebar for a concrete slab grid. Enter slab length, width and bar spacing to get bars each way, total bars and total linear feet of rebar.
Retaining Wall Calculator
Calculate blocks for a retaining wall. Enter wall length and height plus block size to get blocks per course, courses, cap blocks and total blocks.
Roof Pitch Calculator
Calculate roof pitch from rise and run. Get the x:12 ratio, angle in degrees, slope factor and percent grade, plus rafter length for any horizontal run.
Room Lighting Calculator
Find how many lumens and bulbs a room needs. Enter the room size, a target light level in foot-candles and your bulb output in lumens.
Sod Calculator
Estimate rolls and pallets of sod for a lawn. Enter the area length and width, set roll coverage and rolls per pallet, and add waste for cuts.
Solar Panel Calculator
Estimate how much electricity a solar array makes. Enter system size or panel specs, sun hours and losses for daily, monthly and yearly kWh.
Square Footage Calculator
Calculate square footage for one room or many. Enter length and width in feet, inches, meters or yards to get total area in sq ft, sq m and sq yd.
Stair Calculator
Calculate stairs from a total rise. Get the number of steps, riser height, tread run, total run and stringer length for a safe, even staircase.
Tile Calculator
Calculate how many tiles you need for a floor or wall. Enter the area and tile size with a waste allowance to get tiles and boxes to buy.
Topsoil Calculator
Calculate how much topsoil you need for a garden bed. Enter length, width and depth to get cubic yards, cubic feet, bags and approximate weight.
Wallpaper Calculator
Work out how many rolls of wallpaper you need for a wall. Enter wall size, roll size and pattern repeat to get strips per roll and rolls to buy.
Water Heater Cost Calculator
Find the energy and cost to heat a tank of water. Enter gallons, inlet and outlet temperature, your rate and efficiency to get kWh and cost.