Home Improvement calculators

A focused hub of formula-based tools in the home improvement category. Each page includes the calculator, formula, assumptions, and related tools.

Updated 15 Aug 2026

Baluster and Spindle Spacing Calculator

Find baluster count, exact equal gaps, on-center spacing, first and last center marks, stair sloped spacing, and total spindles for railing sections.

Updated 7 Aug 2026

Baseboard and Crown Molding Piece Calculator

Calculate trim linear footage, whole stock pieces, cut allowances, waste, splices, spare length, and cost for baseboard, crown molding, shoe, or chair rail.

Updated 14 Aug 2026

Cabinet Door Paint and Primer Calculator

Calculate cabinet paint and primer quantities from door, drawer, frame, side-panel, coat, coverage, waste, and finish-condition inputs.

Updated 4 Aug 2026

Caulk Tube Coverage Calculator

Calculate caulk tubes, coverage per tube, material volume, and project cost from bead dimensions.

Updated 4 Aug 2026

Curtain Fabric Yardage and Fullness Calculator

Calculate curtain face fabric, fabric widths, adjusted cut length, lining, and cost.

Updated 4 Aug 2026

Deck Board, Joist and Screw Calculator

Calculate decking boards, joists, screws, screw boxes, and board/screw cost.

Updated 4 Aug 2026

Drywall Sheet, Screw and Mud Calculator

Calculate drywall sheets, net area, screws, joint compound, tape, and sheet cost for a room.

Updated 4 Aug 2026

Fence Post Concrete Bag Calculator

Calculate concrete bags for fence posts from post count, hole size, post displacement, bag yield, and waste.

Updated 4 Aug 2026

Flooring Plank and Box Calculator

Calculate flooring boxes, order area, spare area, underlayment rolls, and material cost.

Updated 4 Aug 2026

Gravel Pad and Shed Base Calculator

Calculate gravel cubic yards, tons, bag count, and bulk cost for a compacted pad or shed base.

Updated 5 Aug 2026

Gutter and Downspout Capacity Calculator

Calculate adjusted roof drainage area, peak runoff, recommended gutter size, downspout count, and spacing for residential roof drainage planning.

Updated 4 Aug 2026

Staircase Rise and Run Calculator

Estimate stair risers, tread count, total run, stringer length, angle, 2R+T comfort, and basic code checks from total rise and tread depth.

Updated 4 Aug 2026

Tile Grout Calculator

Calculate grout quantity and bags from tile size, joint width, depth, area, and waste percentage.

Updated 4 Aug 2026

Wallpaper Roll Calculator with Pattern Repeat

Calculate wallpaper rolls, strips, adjusted drop length, waste, and project cost.