Design gutters, downspouts, and yard drainage to protect foundations, siding, and landscaping.
Homeowners improving roof runoff and drainage
Measure roof edge length
Plan downspout placement
Check slope and capacity
Link to drainage exits
Start with the closest real-world task, then use the mapped tools inside each guide.
End-to-end roofing project guide covering material estimates, pitch calculations, underlayment, flashing, and safety planning for shingle or metal roofs.
Free step-by-step rainwater harvesting for garden irrigators. Plan rainwater harvesting with calculators and checklists covering check local legality, size.
Free step-by-step patio construction for DIY homeowners. Plan patio construction with calculators and checklists covering layout and design patio, excavate.
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Convert roof pitch rise and run to angle, percent slope, and pitch factor. Essential for roofing material estimates, rafter layout, and drainage design.
Convert square meters to square feet. Area conversion for real estate and flooring. Free unit converter with precise, instant browser-based conversions — no
Calculate rafter length from span, pitch, and overhang. Get rafter run, rise, diagonal length, and birdsmouth cut dimensions for roof framing.
Calculate asphalt shingles needed for your roof. Enter roof area and bundle coverage to get shingle bundles, squares, and waste allowance for reroofing.
Size gutters and downspouts from roof area and rainfall intensity. Calculate required gutter capacity, downspout count, and K-style or half-round sizing.
Calculate percentages in seven modes with visible formulas, strict input validation, signed percentage change, and symmetric percentage difference.
Free online water usage calculator to estimate household gallons and monthly water bills by fixture and habit. Find easy ways to conserve water and save.
Free online energy savings calculator to estimate utility savings from LED bulbs, smart thermostats, and insulation. See payback on green home upgrades.
Free online recycling savings calculator to estimate landfill diversion, material recovery value, and environmental benefits from home or work recycling.
Build a measured multi-area takeoff, compare exact carton coverage with a reviewed source-tile count, and price whole packages after matching inventory.
Calculate compacted aggregate volume, an explicit loose-order allowance, and tons from the exact supplier density without a universal conversion.
Calculate measured bed fill, an explicit top-up allowance, and optional exact-package bags without assuming one soil recipe, settling rate, or bag size.
Measure rectangular, circular and annular concrete groups with depth ranges, counts and voids. Reconcile exact bag yields or ready-mix terms and save source-owned planning records.
Turn a reviewed concrete volume range or measured rectangular pour into exact bag-pack or supplier-rounded ready-mix quantities, with matching stock and optional sourced quotes.
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Estimate materials and steps for exterior projects where weather, structure, and safety margins matter.
Plan beds, hardscape, plant selection, drainage, and seasonal maintenance for curb appeal.
Scope pools, patios, retaining walls, decks, fencing, and exterior project budgets with weather and safety margins.
Design decks and patios, estimate lumber or pavers, plan footings, drainage, and weather-ready construction.
Design sprinkler or drip zones, set controllers, winterize lines, and fix common irrigation leaks.
Identify moisture sources, plan drainage, sealants, sump systems, and finish-ready basement protection.