Stair Calculator: Balusters

Planning a staircase and its railing? Stair Calculator works out the stairs from your floor-to-floor rise, then spaces the balusters for the railing: a free baluster spacing calculator built in, offline. STAIRS Enter total rise, target riser and tread depth, and get: • Number of steps (risers) and the exact riser height • Number of treads and the total run (horizontal length) • Stringer length (the sloped board to cut) BALUSTER SPACING Enter the section length, the baluster width and your max gap, and get: • How many balusters you need: the fewest that keep every gap under the max • The exact gap and the on-centre spacing • Where the first baluster goes, from the post face to its edge and to its centre • A list of centre marks from the post face, and the spacer block to cut • Level runs (decks, landings, balconies) and stairs: on a stair the gap is solved level between the upright balusters, and the marks are given along the sloped rail, with balusters per tread • Length measured between post faces, post centre to centre, or over the outside of the posts • One tap from your staircase: its own rise and run fill the stair mode • Inches with fractions to 1/16 (type 3 1/2 or 3-1/2) and millimetres, both shown side by side The max gap starts at 4 in (100 mm in metric), a common code limit. Codes differ, so check yours: the app gives no legal advice. Works in centimetres, millimetres or inches. Works offline, no account: your numbers stay on your phone. For carpenters, deck builders and DIYers laying out stairs and railings that are safe and even. Free with a small banner ad; an optional one-time purchase removes the ads, and every feature stays free either way. Stair calculator, staircase calculator, stringer length, rise and run, riser height, baluster spacing calculator, spindle spacing, deck railing — from Fernhart Labs.