Home Improvement Cost Calculators – Paint & Flooring

The cost calculators on this site multiply a quantity by a number you type. A blank price stays at $0 until you fill it in. English material calculators start in feet, gallons, and cubic feet. Money appears only on the two tools in this category, and only after you provide the rate. Prices are yours. See the methodology page.

Cost to paint a house runs the interior paint calculator and, if you switch it on, the exterior paint calculator. Gallons are the same gallons those pages produce: wall area after a 20 sq ft (1.9 m²) door and a 13 sq ft (1.2 m²) window, divided by coverage, times coats, times waste. Coverage starts at 400 sq ft per gallon (about 9.8 m²/L) because that is the paint calculator's editable starting point, not because a tin was surveyed for this page. Replace it. You type a price per gallon and a labor rate per square foot, both in US dollars. Do-it-yourself is the labor field left blank. A hired painter is a rate you type. The page does not convert a day rate into a square-foot rate for you. Ceilings, primer, and trim are separate quantities. Add them only if you have both a quantity and a price. The dollar sign is the currency. The amount is still yours.

Flooring cost is the room area, grown by the waste percentage, times three optional rates: the floor itself, underlayment, and labor. Laminate, vinyl, and hardwood packs are counted on their own pages. Tile is a tile count plus grout plus thinset, and those extra materials are not inside the flooring price unless you put them there. Carpet depends on roll width. Underlayment on this form assumes the same area as the floor. Set that rate to zero when you are not buying it. Apply waste in one place. If the pack calculator already added ten percent, do not add ten percent again here.

A kitchen or a bathroom remodel is more than paint and flooring. Cabinets, counters, and fixtures need a written quote, so this category stays with the two tools that can price a quantity you can measure: paint by the gallon and flooring by the square foot. Bring the quote for the rest of the room. The flooring and paint tools can still price the square feet and the gallons inside a kitchen or a bathroom, using your prices.

How to use a zero safely: calculate the quantity first with the material tool, then come here and type the price from the product in front of you or from a written quote. If the price is per pack and the pack covers 20 sq ft, divide the pack price by 20 before you type a price per square foot, or stay on the pack calculator and multiply packs by the pack price yourself. If the price is per linear foot, convert the floor to linear feet first. Tax, delivery, and waste should each be in the number once. Write down which one you included.

Comparing two floors is two runs. Do not average a laminate price and a tile price. Record both totals, and remember that tile still needs grout and thinset quantities from those calculators. Comparing DIY paint with a painter is one run at labor zero and one run at the painter's rate, with the same gallons. If the painter's quote is a single figure for the whole house, compare that figure with the material line rather than dividing it back into the form. The form is a calculator, not a bid.

Where a manufacturer page was opened, the material calculator starts from that yield and the methodology page names it. Floor mud uses the QUIKRETE 50 lb Deck Mud yield, render uses the Scratch and Brown coverage, limewash uses the Romabio Classico range, insulation uses the Owens Corning R-13 batt, thinset uses the MAPEI Kerabond notch row, and brick mortar uses the QUIKRETE 37-brick line. An 80 lb concrete bag is the earlier checked figure: the QUIKRETE 80 lb Concrete Mix No. 110180 listing of about 0.60 cubic feet, checked on 24 October 2026, entered as 16.99 litres on the concrete calculator. Siding starts from a typical 7 sq ft panel, grout from a typical 100 lb/ft³ and an 11 lb bag, and a paver base from a typical 95 lb/ft³. Those three are labelled typical because no product sheet was opened for them. Sixty-pound and forty-pound concrete bags use the QUIKRETE yields named on the methodology page. Ready-mix rounding to the next quarter yard is an ordering convention, not a price per yard. Stair warnings compare a rise with 7¾ in and a tread with 10 in, figures commonly quoted from IRC R311.7.5, and they are not a permit.

Keep the cost pages in the same discipline when you change a quantity. If you add a room, add a run. If you delete an exterior wall, turn the exterior switch off or set the perimeter to the walls that remain. If a tin covers less than 400 sq ft per gallon (about 9.8 m²/L), the gallons rise and the money rises only because you changed the coverage and typed a price. The site will not silently update a price next month. Last reviewed for these pages is 24 October 2026, which is the date the calculators were added, not the date of a price survey. There was no price survey.

When you are done, the quantity pages are still the place to order materials. The cost pages are only the multiplication. Revisit a price when the quote changes. The calculator does not store last month's tin, last month's pack price, or a labor rate you typed on a different job. Write the rate next to the total if you need to remember it.