Free tools for homeowners
Work out how much paint, tile or mulch to buy, what a heater costs to run and whether refinancing pays. Free, with no account.
Projects inside
Paint, tile, flooring, wallpaper, drywall and insulation: measure the room and get the amount to buy.
- Paint CalculatorHow many gallons or liters of paint for your walls and ceiling, with coats, doors and windows.
- Tile CalculatorHow many tiles and boxes you need for a floor, wall or backsplash, with waste and grout joints.
- Flooring CalculatorSquare footage, boxes and cost for laminate, vinyl plank, hardwood or carpet, with waste.
- Wallpaper CalculatorHow many rolls of wallpaper you need, counted strip by strip with the pattern repeat.
- Drywall CalculatorHow many drywall sheets you need for walls and ceilings, with screws, tape and joint compound.
- Insulation CalculatorRecommended R-value by climate zone, the thickness it takes and how many batts, bags or boards to buy.
- Square Footage CalculatorSquare feet and square meters of rooms of any shape, with waste and cost.
Yard and outside
Decks, fences, concrete, bricks, mulch and gravel, and the water in a pool.
- Deck CalculatorDecking boards, joists, screws or hidden clips, ledger and rim lengths, with a joist span check from DCA 6.
- Fence CalculatorPosts, rails, pickets or panels and concrete for a new fence, with gates and cost.
- Concrete CalculatorCubic yards or meters of concrete and bags for slabs, footings, posts, stairs and curbs.
- Brick CalculatorBricks and mortar for a wall minus doors and windows, for US modular, standard and UK bricks, with mortar bags.
- Mulch and Soil CalculatorCubic yards and bags of mulch, topsoil or compost for beds of any shape and depth.
- Gravel CalculatorCubic yards and tons of gravel or crushed stone for a driveway, path or patio base.
- Pool Volume CalculatorHow many gallons or liters your pool holds, for round, oval and rectangular pools with shallow and deep ends.
Energy and comfort
What an appliance costs to run, how many BTU a room needs and when the air gets damp enough for condensation.
- Electricity Cost CalculatorWhat an appliance costs to run per day, month and year at your rate.
- BTU CalculatorThe air conditioner or heater size a room needs in BTU, with sun, people and kitchen.
- Dew Point CalculatorDew point from temperature and relative humidity, or humidity from the dew point, in °C or °F.
- Moving Boxes CalculatorEstimate how many moving boxes of each size you need for your rooms, with packing supplies.
The mortgage
Monthly payment, refinancing, what you can afford and whether renting or buying comes out ahead.
- Mortgage CalculatorMonthly payment with taxes, insurance and PMI, plus the full schedule.
- Refinance CalculatorIs refinancing worth it? New payment, break-even month and lifetime savings.
- Home Affordability CalculatorHow much house you can afford from your income, debts, down payment and rate.
- Rent vs Buy CalculatorCompare renting and buying a home over the years, including equity and opportunity cost.
Templates to print or edit
All templatesFree apps and resources, checked by hand
All free listsGuides
All guides- How to Measure a Room for Paint, Flooring, Tile and DrywallMeasure floors, walls, L-shapes and sloped ceilings, subtract doors and windows, and work one room into paint, flooring, tile, drywall and wallpaper.
- Fixed-Rate vs Adjustable-Rate Mortgage: How ARMs WorkWhat 5/1 and 7/6 mean, how the index and margin set the rate, what the caps limit, and a worked worst case next to a fixed loan, with CFPB sources.
- What Is PMI and When Does It Go Away?Private mortgage insurance costs, the 80 and 78 percent rules for cancelling it, how many years that takes at 3, 5 or 10 percent down, and how FHA differs.
- Cubic Yards Explained: Mulch, Gravel, Soil and ConcreteA cubic yard is 27 cubic feet, about 0.765 cubic meters. Yards from feet and inches, coverage at each depth, bags per yard, and six projects worked out.
- What 1% in Mortgage Rate Costs: Payment and Interest TablePayment and total interest on a 30-year loan from 4 to 8 percent, one point at three loan sizes, the buying power a point removes, and the 15-year term.
- How to Save for a Down Payment: Targets and TimelinesMinimum down payments for FHA, conventional, VA and USDA loans, why 20 percent matters, monthly savings by price and deadline, and where to keep it.
Each project calculator explains under the tool how it gets to the number, so you can check it against the label on the can or box before you buy.