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Contractor-Grade Calculators for Serious DIYers

Skip slow, ad-choked calculators. Get exact cubic yards, Home Depot bag counts, paint gallons, and resin volumes in real time with built-in waste margin protection.

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Explore Calculators by Construction Silo

Topical authority silos designed for maximum contractor accuracy and deep SEO coverage.

Structural Silo

Concrete & Masonry

Contractor-grade concrete slab, patio, footing, and masonry calculators with instant conversion between cubic yards, cubic meters, and pre-mixed bagged concrete with safety margin margins.

Active Tools (12)

Concrete Slab Calculator

Compute cubic yards, truckloads, and 60lb/80lb store bags for patios, driveways, sidewalks, and garage floors.

Hot Tub Pad Concrete Calculator

Engineered for high structural deadweight: calculates 4" to 6" reinforced slab requirements for residential spas and swim tubs.

Concrete Footing & Pier Calculator

Estimate cylindrical tubes (8", 10", 12" Sonotubes) or continuous trench footings for decks, pergolas, and retaining walls.

Shed Foundation Concrete Slab Calculator

Calculates cubic yards, truck delivery vs 80lb bags, and reinforced edge form requirements for backyard storage sheds.

Backyard Basketball Court Concrete Calculator

Determines concrete cubic yardage, ready-mix trucks, and joint layouts for standard half-court and key backyard ball courts.

RV Pad & Heavy Motorhome Concrete Calculator

Engineered for high axle deadweights: calculates 5" to 6" reinforced pad requirements for Class A motorhomes and 5th wheels.

Concrete Driveway Calculator

Computes bulk yardage, truckloads, control joints, and budget costs for single and double car residential driveways.

Concrete Patio Slab Calculator

Computes yards and bag counts for 10x12, 12x16, or custom outdoor dining patios with 1/4" per foot drainage pitch.

Concrete Sidewalk & Walkway Calculator

Estimates volume and store bags for 3-foot and 4-foot wide pedestrian walkways and paths.

Sonotube Round Pier Concrete Calculator

Cylinder volume calculator for Sonotube forms (8" to 16" diameter) to below-frost depths.

Fence Post Concrete Calculator

Determines fast-setting and standard concrete premix bags for multiple 4x4 and 6x6 fence post holes.

Deck Footing & Pier Concrete Calculator

Computes concrete volume and bags for structural deck piers dug below municipal frost depth.

12 Free Tools Available

Groundwork Silo

Landscaping & Yard

Accurately calculate bulk cubic yards and tons for garden beds, gravel driveways, decomposed granite pathways, and topsoil aeration with settled-depth factors.

Active Tools (9)

Mulch & Gravel Calculator

Instantly compute cubic yards, metric tons, and 2 cu ft / 3 cu ft bagged products for flower beds, paths, and driveways.

Pea Gravel Patio & Walkway Calculator

Calculates 3/8" round pea stone yardage, base rock compaction, and weed barrier square footage for outdoor living spaces.

Pea Gravel Calculator

Calculates 3/8" round pea stone volume, tons, and bags for pathways, fire pits, and play spaces.

Crushed Stone Driveway Calculator

Computes bulk tonnage and tri-axle dump truckloads of #57 stone and crusher run for driveways.

Topsoil & Raised Garden Bed Calculator

Computes exact 1.5 cu ft and 2 cu ft soil bags or bulk yardage for elevated backyard vegetable planter boxes.

Paver Sand & Base Material Calculator

Determines bedding sand (1" screed) and crushed stone base depth for interlocking patio pavers.

River Rock Landscape Calculator

Computes tonnage and cubic yard requirements for 1" to 3" decorative river stone and landscape rock.

French Drain Gravel Calculator

Estimates washed stone volume for trench drainage pipes based on length, width, and depth.

Playground Mulch & Wood Chips Calculator

Calculates safety-compliant 6" to 12" wood fiber depths for backyard swing sets and playsets.

9 Free Tools Available

Finishes Silo

Flooring & Tile

Precision layout calculators for ceramic, porcelain, subway tile, and hardwood flooring. Automatically computes pattern waste (herringbone, straight, brick) and grout bag requirements.

Active Tools (7)

Tile & Grout Calculator

Computes total tile pieces, packaged cartons, thin-set mortar, and dry grout bags for bathroom floors, showers, and kitchen backsplashes.

Hardwood & Laminate Flooring Calculator

Calculates plank box requirements, room square footage, underlayment rolls, and transition molding footage.

Subway Tile Kitchen Backsplash Calculator

Determines tile counts, cartons, and unsanded grout for 3"x6" ceramic kitchen wall backsplashes.

Walk-in Shower Wall Tile Calculator

Calculates tile boxes and polymer-modified thinset mortar for 3-sided shower surrounds.

Bathroom Floor Tile Calculator

Estimates tile boxes, Ditra underlayment, and grout for master and powder room floors.

Large Format 24x24 Porcelain Tile Calculator

Precision calculation for large 24"x24" tiles, leveling spacers, and non-sag medium bed mortar.

Herringbone Pattern Tile Calculator

Accounts for triangular 45-degree perimeter cut waste required for herringbone layouts.

7 Free Tools Available

Surfaces Silo

Walls & Painting

Accurately deduct doors and windows to calculate net surface square footage, number of paint coats, drywall panel optimization (4x8 vs 4x12), and joint compound.

Active Tools (7)

Paint Gallon & Coverage Calculator

Automatically deducts windows and doors to compute net wall square footage and exact paint/primer gallons required.

Drywall Sheet & Compound Calculator

Calculates sheetrock panels, drywall screw boxes, joint compound buckets, and paper tape rolls.

Exterior House Paint Calculator

Estimates 5-gallon commercial buckets and gallon cans for outdoor siding, trim, and stucco facades.

Bedroom Paint Calculator

Determines gallons and touch-up quarts for 10x12, 12x14, and master bedroom walls and ceilings.

Ceiling Paint Calculator

Calculates dead-flat white paint volume for smooth, textured, or acoustic popcorn ceilings.

Wood Fence Paint & Stain Calculator

Estimates paint and semi-transparent stain gallons for double-sided picket fences and rails.

Drywall Primer & Sealer Calculator

Calculates PVA primer sealer gallons needed to equalize porosity on fresh drywall and joint mud.

7 Free Tools Available

Craft & Build Silo

Woodwork & Resin

Volumetric epoxy resin fluid ounce/liter calculators with Part A/B mixing ratios, wood river mold displacement, and board footage lumber dimension calculators.

Active Tools (7)

Epoxy Resin Calculator

Accurately measures fluid ounces, milliliters, and Part A/B mixing ratios (1:1, 2:1, 3:1) for live edge river tables and molds.

Deck Stain & Sealer Calculator

Calculates stain gallons for wood decks, railings, baluster spindles, and stair risers.

Live Edge River Table Epoxy Calculator

Calculates 2:1 deep pour casting resin volume in fluid ounces and liters for live edge wood river slabs.

Epoxy Countertop & Bar Top Calculator

Computes 1/8" surface flood coat fluid ounces with edge drip runoff factor for kitchen and bathroom counters.

Bar Top High-Gloss Epoxy Calculator

Determines seal coat and thick flood coat gallons for high-gloss, alcohol-resistant wooden bar tops.

Round Epoxy Tabletop Calculator

Calculates cylinder and circular surface resin volume for round live edge tables and clock molds.

Resin Coaster & Small Mold Calculator

High-precision small volume calculator in milliliters and ounces for craft silicone molds and resin art.

7 Free Tools Available

Mechanical Silo

Electrical & HVAC

HVAC cooling capacity (BTU & tons), wire gauge sizing over long runs, and circuit breaker safe continuous load calculators designed to NEC guidelines.

Active Tools (1)

Room AC & Heat Pump BTU Calculator

Calculates window unit, mini-split, and central AC cooling BTU output and ton capacity with sun insulation multipliers.

1 Free Tool Available

Contractor-Grade Calculators for Serious DIYers

Most Popular Project Calculators

Concrete Slab Calculator

Mulch & Gravel Calculator

Epoxy Resin Calculator

Paint Gallon & Coverage Calculator

Tile & Grout Calculator

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Instant Store Bag Math

Dual Imperial & Metric

Waste & Spill Contingency

Explore Calculators by Construction Silo

Concrete & Masonry

Landscaping & Yard

Flooring & Tile

Walls & Painting

Woodwork & Resin

Electrical & HVAC