Calculator library
Home Project Calculators
Find a tool by project, material or measurement. Start with a priority tool or enter a specific task below; category hubs keep the complete calculator library crawlable without putting hundreds of full cards on one page.
Planning more than one material? Save calculator results into one local project and build a combined shopping plan.
Open Project PlannerMulti-material project planning
Enter shared geometry once.
Use a composite planner when one real project needs several related material decisions.
Priority starting points
High-value US project and measurement tools
These starting points cover common measurement and material jobs while keeping each calculator focused on one clear project decision.
Concrete & Masonry
Concrete Form Board Calculator
Estimate concrete form-board run and whole stock pieces from slab dimensions, unformed edges, explicit waste allowance and selected stock length.
Open calculator →Insulation & SealingFoam Board Insulation Calculator
Estimate rigid foam-board sheets for a rectangular insulation surface from measured area, openings, actual sheet dimensions and an explicit cut allowance.
Open calculator →MeasurementSquare Footage Calculator
Calculate square footage for rectangles, circles or triangles, multiply repeated areas and optionally estimate cost per square foot.
Open calculator →MeasurementRectangle Diagonal Calculator
Calculate the expected corner-to-corner diagonal of a rectangle and compare it with a field-measured diagonal without treating the result as a structural tolerance.
Open calculator →Walls & CeilingsWallpaper Calculator
Estimate wallpaper rolls from room dimensions, wall-by-wall strip rounding, wall height, roll dimensions, pattern repeat and an entered trim allowance.
Open calculator →Roofing & ExteriorRoof Area Calculator
Estimate simple-gable roof square footage and roofing squares from horizontal footprint, overhang and roof pitch before material-specific waste or packaging.
Open calculator →Plumbing & DrainagePipe Slope Calculator
Calculate vertical drop from pipe run and an entered slope percentage, with grade ratio reference for layout checks.
Open calculator →Kitchen & BathroomCabinet Linear Feet Calculator
Total base, wall and tall-cabinet runs with an editable planning allowance for preliminary cabinet scope comparisons.
Open calculator →Kitchen & BathroomShower Niche Tile Calculator
Estimate tile coverage for rectangular shower niches from back, side, top and bottom surfaces plus an explicit cut/layout allowance.
Open calculator →Lawn & GardenLawn Seed Calculator
Estimate grass seed weight from lawn area and the seed label application rate.
Open calculator →Plumbing & DrainageTrench Backfill Calculator
Estimate net trench backfill volume after subtracting entered pipe displacement and a defined bedding layer from measured excavation volume.
Open calculator →InteriorBaseboard Calculator
Estimate baseboard or trim linear feet and number of stock pieces for a rectangular room.
Open calculator →MeasurementCone Volume Calculator
Calculate right-cone volume from measured base diameter and perpendicular height, with US and Metric output for reusable project geometry.
Open calculator →InteriorFlooring Transition Strip Calculator
Convert measured doorway and material-change runs into waste-adjusted flooring transition stock pieces using the selected stock length.
Open calculator →Plumbing & DrainageDrain Pipe Length Calculator
Convert measured drain runs into an allowance-adjusted pipe length and whole stock-section count for material planning.
Open calculator →Insulation & SealingSpray Foam Gap Calculator
Estimate spray-foam gap volume and whole cans or kits from measured joint length, average width, depth, product yield and an explicit application allowance.
Open calculator →Walls & CeilingsDrywall Tape Calculator
Add measured drywall joint and inside-corner lengths, apply a visible allowance and convert the result into whole tape rolls with optional cost.
Open calculator →Roofing & ExteriorHouse Wrap Tape Calculator
Convert measured house-wrap seam, opening-perimeter and detail runs into waste-adjusted tape rolls using the selected roll length.
Open calculator →Browse the complete library
Choose a project category
Each category page contains crawlable links to every calculator in that project family, so the main hub can stay fast and focused.
23 calculators
Interior Project Calculators
Paint, door paint, flooring, tile and trim planning for rooms and finished spaces.
Browse category →14 calculatorsLandscaping Material Calculators
Bulk and bagged materials for beds, paths and outdoor surfaces.
Browse category →15 calculatorsLawn & Garden Calculators
Seed and sod planning for measured lawn areas.
Browse category →26 calculatorsConcrete & Masonry Calculators
Concrete volume, footing, masonry quantity and brick coursing/layout planning for measured projects.
Browse category →22 calculatorsMeasurement Calculators
Core geometry, layout verification and takeoff tools used before material planning.
Browse category →22 calculatorsWalls & Ceilings Calculators
Drywall, finishing, ceiling tile quantity and balanced border layout, insulation and wall-framing planning.
Browse category →19 calculatorsOutdoor Project Calculators
Fence, deck, railing and outdoor quantity/layout planning from verified runs, panel openings and entered design values.
Browse category →24 calculatorsRoofing & Exterior Calculators
Roof pitch, rafter geometry, roof area, shingles, underlayment, siding and gutter material planning.
Browse category →23 calculatorsKitchen & Bathroom Calculators
Countertops, wet-area surfaces, cabinet finish stock and hardware quantity planning.
Browse category →23 calculatorsPlumbing & Drainage Calculators
Pipe volume, slope, routing, PEX tubing and French-drain aggregate quantity planning.
Browse category →13 calculatorsInsulation & Sealing Calculators
Attic, pipe, duct-wrap, weatherstripping and sealant quantity planning from measured surfaces and runs.
Browse category →Start from a drawing
Measure a plan before choosing the material calculator.
Upload a floor plan or project screenshot locally in your browser, set scale from one dimension you know, and trace areas or runs before moving into a trade-specific calculator.
Plan → geometry → material
- Manual scale calibration
- Area and run evidence
- Trade-specific next steps
- Browser-local project handoff