Construction Calculators
22 tools- Concrete Calculator
Free online concrete calculator. Calculate cubic yards, cubic meters, and number of 60lb/80lb bags needed for slabs, footings, and columns.
- Brick Calculator
Free online brick calculator. Calculate the number of bricks and mortar needed for any wall.
- Paint Calculator
Free online paint calculator. Calculate gallons of paint needed for any room. Accounts for doors, windows, coats, ceiling, and custom coverage rates.
- Roofing Calculator
Free online roofing calculator. Calculate squares of roofing, shingle bundles, and underlayment rolls. Supports multiple roof pitches and shingle types.
- Lumber Calculator
Free online lumber calculator. Calculate board feet, linear feet, and estimated cost for any lumber dimensions. Supports inches and centimeters.
- Flooring Calculator
Free online flooring calculator. Calculate square footage, boxes needed, and cost for hardwood, laminate, vinyl, and tile flooring with waste factor.
- Drywall Calculator
Free online drywall calculator. Calculate drywall sheets, screws, joint compound, and tape needed for any room. Supports 4x8, 4x10, and 4x12 sheets.
- Stair Calculator
Free online stair calculator. Calculate number of steps, rise per step, run per step, total run, stringer length, and stair angle with building code.
- Excavation Calculator
Free online excavation calculator. Calculate dig volume in cubic yards, loose volume with swell factor, truck loads, and weight for trenches.
- Rebar Calculator
Free online rebar calculator. Calculate linear feet of rebar, number of standard bars, and weight for concrete slabs. Supports #3 through #8 rebar sizes.
- Rebar Equivalent Calculator
Rebar Equivalent Calculator — Compare reinforcement steel bar configurations. Input your original bar size and quantity to find equivalent bar configura...
- Concrete Blocks Calculator
Concrete Blocks Calculator — Estimate concrete blocks (cinder blocks) and mortar materials needed for your wall. Provide the wall dimensions and block s...
- Plaster Sand & Cement Calculator
Plaster Sand & Cement Calculator — Calculate the quantities of cement and sand required for plastering works. Input the total plaster area, thickness, m...
- 1D Cutting Optimizer
Optimize linear cuts: bars, pipes, beams, timber. FFD algorithm minimizes waste with visual layout. Supports blade kerf, bulk quantities. Free, private.
- 2D Sheet Cutting Optimizer
Optimize 2D sheet cuts: plywood, MDF, drywall, panels. Shelf algorithm with 90-degree rotation. Visual layout with kerf. Free & private in your browser.
- Steel Bar Cutting Optimizer
Optimize steel bar and rebar cutting for construction. 12m default stock, FFD algorithm minimizes scrap. Visual layout, kerf support, bulk quantities.
- Tile Calculator
Calculate tiles needed for floor or wall. Enter tile size, grout gap, area to get count, boxes, cost & visual grid layout. Free, private, no sign-up.
- Grout Calculator
Calculate grout for tiling. Enter tile size, gap & area to get volume in kg/liters. Sanded, unsanded & epoxy grout supported. Free private tool.
- Wall Area Calculator
Calculate paintable wall area for rooms. Subtract doors, windows & custom openings. Per-room breakdown with layout view. Free private tool.
- Rebar Weight Calculator
Calculate steel rebar weight instantly using the d²/162 formula. Supports all bar diameters (6-40mm). Common bar sizes reference table included.
- Plumbing Path Designer
Design plumbing connections by dragging elbows, reducers, couplings, and adapters onto a canvas. Set start/end BSP thread types and sizes. Auto-solve suggests the optimal fitting path.
- Electrical DB Builder
Build electrical distribution boards with drag-and-drop. Add Main Isolator, RCCB, ELCB, MCBs, RCBOs, SPD, busbar, and meter. Auto-generate load schedule with cable sizing.