Construction & DIY Calculators

Estimate a room cooling load in BTU per hour and translate it into tons and a common air-conditioner size.

Estimate concrete in cubic yards and number of bags needed.

Estimate decking boards, linear feet, joists, and screws from deck size and board dimensions.

Estimate drywall sheets, joint compound, tape, and screws from wall area and sheet size.

Convert coating area and thickness into resin volume, gallons, litres, and part A and B amounts.

Estimate posts, sections, rails, pickets, and concrete bags for a run of fence.

Convert a stacked woodpile into cubic feet, cords, face cords, and cubic metres.

Estimate flooring needed including cutting waste.

Add up running and starting watts, apply headroom, and see the generator size and kVA to look for.

Calculate gravel volume in cubic yards, weight in tons, and the number of bags needed.

Estimate gutter length, hanger count, downspout pipe, and 10 ft sections from the roof edge run.

Find the extra R-value, installed thickness, package count, and material cost for a wall or ceiling.

Estimate water use per watering session, week, and month from area, application rate, and run time.

Estimate mulch, gravel, or topsoil required in cubic yards and standard bags from area and depth.

Estimate daily and annual feed weight and cost from herd size, body weight, and intake percent.

Compute board feet for any lumber quantity and size.

Calculate mulch in cubic yards, cubic feet, bags, and approximate weight.

Estimate gallons of paint needed for walls and ceilings.

Estimate pavers from patio area, paver size, joint width, and a cutting waste allowance.

Calculate concrete volume per post hole after subtracting the post, plus bags at your yield.

Estimate annual rain capture from a roof footprint using rainfall and a runoff coefficient.

Estimate rebar linear feet, stock bars, and weight for a slab grid at your spacing and bar size.

Convert roof rise and run into pitch, angle in degrees, percentage grade, and slope multiplier.

Calculate roof surface area, roofing squares, and bundle counts from ground footprint and pitch.

Compute floor area in square feet and square meters.

Compute room volume in cubic feet and cubic yards.

Estimate siding pieces, squares, and boxes from exterior wall area, coverage, and waste.

Estimate sod rolls and pallets from lawn area with a waste allowance and your supplier roll coverage.

Size a solar array from annual electricity use, peak sun hours, panel wattage, and system losses.

Calculate risers, treads, total run, and stringer length from total rise and target riser height.

Estimate tile quantities and full boxes needed based on room dimensions, tile size, and waste.

Estimate topsoil in cubic yards, tons, and bags for lawns, beds, and raised areas.

Estimate wallpaper rolls from wall size, roll dimensions, and pattern repeat, including pattern matching waste.