DIY & home improvement calculators

Enter the finished cabinet door size, weight, and hinge-center inset to estimate the hinge count and evenly spaced cup centerlines.

Enter the ceiling height, fan dimensions, slope, and nearby obstructions to see which listed downrod length can fit. The result checks blade height, sloped-ceiling clearance, wall clearance, and the mount angle limit together.

Enter the panel size, framing layout, and project quantity to estimate the screw spacing pattern, screws per panel, total screws, and packages to buy.

Enter one uninterrupted wall section to size equal molding boxes, list the miter cuts, and estimate how many stock pieces to buy.

Enter the clear width of one fence bay, the actual board width, and the overlap you want. The calculator selects the smallest whole front-face count that meets that overlap, then gives matching rear-face marks and material quantity.

Enter the shelf span, depth, thickness, load, and material properties to estimate midspan sag and bending stress. The calculator also solves backward for load, span, and thickness at the limits you set.

Enter the surface, tile, grout, and perimeter gap dimensions to lay out a centered straight grid. The calculator compares orientations, avoids narrow edge slivers when the span allows it, and returns border cut sizes and starting offsets.

Enter one uninterrupted wall section to choose a balanced number of wainscoting panels, mark every stile, and make a basic rail-and-stile cut list.

Enter the wall run, roll dimensions, repeat, and trim allowance to estimate physical rolls to buy. The result shows the strip count, drop length, spare drops, and cutting waste behind the roll total.