Construction & Home calculators
Choose a task below. Check each calculator’s assumptions and units before using its result.
French Drain Slope, Trench Gravel & Pipe Sizing Calculator
Calculate minimum trench slope elevation drop, washed drainage gravel tons & cubic yards, pipe sizing, and geotextile fabric wrap.
Galvanic Anode Life Calculator - Sacrificial Zinc Mag Mass
Calculate sacrificial galvanic anode consumption rate, required total alloy mass, service life (years), and anode quantity for Magnesium, Zinc, and Aluminum per NACE and DNV standards.
Garage Floor Epoxy & Flake Coverage Calculator | AnythingOnline
Free garage floor epoxy calculator. Calculate 100% solids epoxy gallons at target mils DFT, decorative vinyl flake broadcast pounds, and clear topcoat kits.
Glass Thermal Stress Breakage Calculator - Solar Fracture
Assess spontaneous thermal fracture risk from solar radiation absorption, indoor window blinds, deep exterior overhang shadows, and glass edge treatments.
Gravel Driveway Calculator - Tons, Yards & Base Depth
Determine exact crushed stone tonnage, cubic yards, and dump truck loads for driveways, parking pads, and sub-bases.
Gutter Sizing Calculator - Downspout Area & Rainfall
Determine required gutter width (5" vs 6" K-Style) and downspout count based on roof drainage area and rainfall intensity.
Hardwood & Vinyl Plank Flooring Box & Waste Calculator | AnythingOnline
Free flooring calculator for hardwood, laminate, and LVP. Calculate exact square footage, cutting waste % by layout, total cartons/boxes to buy, and underlayment rolls.
Horse Hay Calculator - Daily Forage Intake & Bales
Determine daily forage requirements, monthly bale consumption, waste margins, and winter season hay stockpiles.
Horse Weight Calculator - Heart Girth & Body Length
Estimate equine body weight in pounds and kilograms using heart girth and point-of-shoulder to point-of-buttock measurements.
Hotel Linen Par Level Calculator - Inventory & Turnover
Determine total linen inventory requirements across guest rooms, laundry wash cycles, and linen closets to maintain 3.0 to 4.0 par stock.
Insulated Glass U-Factor Calculator - SHGC & Thermal
Determine center-of-glass U-factor, thermal resistance (R-value), Solar Heat Gain Coefficient (SHGC), and condensation resistance for double and triple pane IGUs.
Laundry Chemical Dosage Calculator - Wash Formula PPM
Determine automatic chemical pump injection dosages (oz per hundredweight / cwt), active chlorine bleach PPM, and sour pH neutralization.
Linen Flatwork Ironer Calculator - Roll Speed & PPH
Determine roll finishing speed (FPM), sheets and tablecloths processed per hour (PPH), steam evaporation capacity, and feeding labor requirements.
Mortar Mix Ratio Calculator - Type N, S, M, O Cement
Scale exact batch volumes of Portland cement, hydrated lime, and washed masonry sand for ASTM C270 Type M, S, N, and O mortars.
Paint Calculator - Gallons, Primer & Wall Square Feet
Determine exact gallons of wall paint, ceiling paint, and primer needed accounting for surface porosity and multiple coats.
Pasture Stocking Rate Calculator - Animal Units (AUM)
Determine pasture carrying capacity, head counts, and Animal Unit Months (AUM) while preserving root reserves.
Paver Patio Calculator - Base Gravel, Sand & Paver Count
Determine exact paver counts, compacted crushed stone road base, bedding sand depth, and polymeric joint sand.
Pergola Lumber & Material Bill of Materials (BOM) Calculator | AnythingOnline
Free pergola lumber calculator. Calculate 6x6 posts, double 2x10 support beams, 2x8 rafters, 2x2 shade purlins, and concrete footings for backyard pergolas.
Pipe Friction Loss Calculator - Hazen-Williams PSI Drop
Calculate fluid pressure drop in PSI, total dynamic head loss, and water velocity in water piping using the Hazen-Williams equation.
Pole Barn Post Embedment Depth & Uplift Resistance Calculator | AnythingOnline
Free pole barn post embedment depth calculator. Calculate required post hole depth per IBC 1807.3, lateral wind load resistance, uplift safety factor, and concrete collar sizing.
Pool Volume Calculator - Gallons & Chemical Turnover
Calculate exact swimming pool water volume in Gallons and Liters for proper chemical balancing and filtration pump turnover rate sizing.
Rainwater Harvesting & Cistern Tank Sizing Calculator
Calculate total roof catchment rainwater yield (gallons & liters), first-flush diversion, and optimal cistern tank storage capacity.
Rebar Grid Calculator - Grid Spacing, Weight & Linear Ft
Determine rebar bar counts, total linear footage, lap splices, and steel tonnage for reinforced concrete slabs.
Roof Pitch Calculator - Slope Pitch Angle & Rafter Rise
Convert roof rise over run into pitch angle degrees, slope multiplier factors, and true surface area scaling.
Roof Rafter Calculator - Common Rafter Length & Overhang
Calculate precise common rafter cutting length, ridge board deductions, bird’s mouth seat cuts, and overhang dimensions.
Roofing Shingle Calculator - Squares & Bundle Count
Determine roofing squares, architectural shingle bundle counts, starter strips, and ridge caps including complexity waste factors.
Shaker Cabinet Door Dimension, Rail & Stile Calculator | AnythingOnline
Free Shaker cabinet door calculator. Derive cut lists for stiles, rails, and flat panels with tenon depth, overlay (inset, 1/2", full), and wood expansion allowances.
Sonotube Concrete Calculator - Pier Volume & Bag Count
Determine concrete volume in cubic yards and pre-mixed bag counts for cylindrical deck post piers and footings.
Stair Stringer Calculator - Rise, Run & Steps Sizing
Calculate exact stair stringer cuts, individual step rise and run, stringer lumber stock length, and IRC building code compliance.
Standing Seam Metal Roof Panel & Trim Material Calculator | AnythingOnline
Free standing seam metal roof calculator. Calculate panel count, linear footage, clip spacing, ridge caps, drip edges, and rake trims based on roof width, run, and pitch.
Stormwater Runoff Calculator - Rational Method Peak Q
Calculate peak stormwater runoff discharge rate (Q) in Cubic Feet per Second (CFS) using the civil engineering Rational Equation Q = CIA.
Structural Silicone Glazing Bite Calculator - ASTM C1401
Size structural silicone adhesive joints adhering vision glass to aluminum curtain walls per ASTM C1401 engineering design standards.
Subfloor Plywood & OSB Sheathing, Fastener & Glue Calculator | AnythingOnline
Free subfloor calculator. Calculate 4x8 plywood and OSB sheets, subfloor glue tubes, joist span deflection rating, and screw/nail counts per IRC building code.
Surge Tank Sizing Calculator - Water Hammer Volume Area
Size open standpipe and throttled surge tanks for penstocks and water pipelines: calculate Thoma stability area, maximum water upsurge (Zmax), and required volume per AWWA M11.
Three-Coat Stucco (Scratch, Brown & Finish) Materials Calculator | AnythingOnline
Free three-coat stucco calculator. Calculate Portland cement bags, lime, sand tons, diamond mesh lath sheets, and weep screed for ASTM C926 scratch, brown, and finish coats.
Tile & Grout Calculator - Square Feet, Boxes & Bags
Estimate total tile piece count, box requirements, waste margin cuts, and pounds of powdered grout for floors and shower walls.
Tile Shower Pan Slope, Mortar Bed & Pan Liner Calculator | AnythingOnline
Free tile shower pan slope and mortar bed calculator. Calculate 1/4" per foot pre-slope, deck mud 50lb bags, PVC pan liner square footage, and curb materials per TCNA standards.
Trench Excavation Calculator - Cubic Yards & Soil Swell
Determine trench cut volume, soil swell expansion, loose haul-off volume, and dump truck counts.
Vinyl Siding Squares & Trim Calculator | AnythingOnline
Free vinyl siding calculator. Calculate siding squares (100 sq ft), 2-square cartons, starter strip footage, J-channel trim, and outside corner posts for any house.
Wall Stud Framing & Plate Lumber Calculator | AnythingOnline
Free wall framing calculator for 2x4 and 2x6 construction. Calculate total studs at 16" or 24" OC, double top plates, corner posts, and door/window king and jack studs.
Wallpaper Calculator - Rolls Needed & Pattern Repeat
Determine exact wallpaper roll counts, usable strip yields, and waste allowances for straight match and half-drop pattern repeats.
Water Heater Sizing Calculator - Tankless & Tank GPM
Size tankless and storage tank water heaters by calculating peak simultaneous flow rates (GPM) and groundwater temperature rise (ΔT).
Wood Privacy Fence Materials & Picket Calculator | AnythingOnline
Free wood fence calculator. Calculate pickets (solid, shadowbox, board-on-board), 4x4 posts, 2x4 rails, fast-setting concrete bags, and screws for any linear footage.