Calculator branch
Planning quantities with the formula left on.
Ten guest-first imperial and metric tools with formulas, examples, assumptions, and editor handoff.
How should I use these?
Use calculators for an early quantity range, then transfer the dimensions into the plan and replace defaults with product and professional inputs.
Calculator workflow
- Choose imperial or metric
- Enter measured inputs
- Read formula and caveats
- Transfer the starting dimensions to the editor
Ten working tools
Every tool works before sign-in, converts entered values between unit systems, calculates in the browser, shows both-unit results where useful, and updates a crawlable editor handoff.
Square footage and square meters calculator
Calculate the area of a rectangular planning zone and see the equivalent in both unit systems.
Area = length x width. 1 square foot = 0.09290304 square meter.Pending reviewBaseline wall-stud calculator
Estimate repeated stud positions for straight wall runs in imperial or metric units.
Baseline positions = ceiling(wall length / spacing) + 1; total = baseline positions x identical wall runs.Pending reviewDrywall sheet planning calculator
Estimate sheets from total wall-face length, height, openings, sheet coverage, layers, and waste.
Sheets = ceiling(((face length x height - openings) x layers x (1 + waste)) / sheet area).Pending reviewPaint volume calculator
Estimate gallons or liters from paintable area, coats, labeled coverage, and allowance.
Paint volume = area x coats x (1 + allowance) / labeled coverage per volume unit.Pending reviewRectangular slab concrete calculator
Calculate a simple slab volume in cubic yards and cubic meters.
Volume = length x width x thickness. Imperial cubic yards = cubic feet / 27.Pending reviewFlooring purchase-area calculator
Apply explicit layout waste to measured floor area and see both unit systems.
Purchase area before package rounding = net area x (1 + waste allowance).Pending reviewSimple pitched-roof area calculator
Convert horizontal plan area to sloped surface area with an explicit rise-to-run ratio and waste allowance.
Sloped area = plan length x plan width x sqrt(1 + (rise / run)^2) x (1 + waste).Pending reviewSiding surface-area calculator
Estimate net wall-face area from perimeter, height, openings, and allowance.
Purchase area = max(perimeter x height - openings, 0) x (1 + waste).Pending reviewInsulation package calculator
Estimate package count from net assembly area, labeled package coverage, and allowance.
Packages = ceiling(area x (1 + waste) / labeled package coverage).Pending reviewFence panel and baseline post calculator
Estimate repeated panels and line-post positions from a measured fence path and total gate openings.
Panels = ceiling(max(path length - gate openings, 0) / panel length); baseline line positions = panels + 1.Pending reviewStair rise and run calculator
Work out how many risers a floor-to-floor height needs, what each riser actually measures, and how much floor length the flight consumes.
Risers = round(total rise / target riser); actual riser = total rise / risers; treads = risers - 1; total run = treads x tread depth.Pending reviewRoof pitch calculator: slope, angle, and rafter line
Convert a rise-over-run roof pitch into degrees and a slope factor, and see the sloped rafter length across half a span.
Angle = arctan(rise / run) in degrees; slope factor = sqrt(1 + (rise / run)^2); sloped rafter line = (span / 2) x slope factor.Pending reviewTile calculator: how many tiles for a floor or wall
Turn a measured area and a tile face size into a tile count with a visible waste allowance, before boxes and pattern cuts.
Tile face area = tile length x tile width converted to the area unit; tiles = ceiling(area x (1 + waste) / tile face area).Pending reviewDeck board calculator: rows and linear length
Estimate how many rows of decking cross a deck and the linear board length required, with the gap between boards made explicit.
Covered width per row = board width + gap; rows = ceiling(deck width / covered width); linear length = rows x board run length x (1 + waste).What the tools deliberately do not do
They do not select assemblies, verify codes, size structure or utilities, choose products, obtain prices, create bids, or guarantee purchases. They preserve raw geometry, allowances, and rounding as separate ideas so a qualified reviewer can follow the calculation.