Free Online Calculators
Finance, math, health, construction, and everyday tools in one searchable catalog.
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Stair Runner Calculator & Cut Planner
Stair Stringer Calculator — Rise, Run & Layout
Steel Tube Roof Truss Calculator — Loads & Deflection
Stud Wall Calculator — Layout & Lumber List
Calculator descriptions
Stair Runner Calculator & Cut Planner
Choose the actual stair surfaces covered, enter measured paths, and plan separate runner cuts and supplier lengths.
Stair Stringer Calculator — Rise, Run & Layout
Plan a straight staircase, fit the available space and compare riser counts. See a proportional drawing and print your dimensions in inches or millimetres.
Steel Tube Roof Truss Calculator — Loads & Deflection
Build a gable, mono-pitch or arched rectangular-tube truss and calculate roof loads, reactions, member forces, deflection, tube mass and a cut schedule.
Stud Wall Calculator — Layout & Lumber List
Lay out regular wall studs and rough door or window openings, then see a transparent preliminary lumber list.
