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HomeCalcify
Home improvement calculators

Estimate materials and cost in seconds.

Free, accurate calculators for concrete, roofing, flooring, paint, drywall, and more. Know exactly how much material you need — and what it will cost — before you buy.

Instant results

Calculations update as you type — no reload, no waiting.

Contractor-reviewed

Formulas verified by licensed tradespeople.

Material + cost

Get bags, coverage, and a cost estimate in one place.

Imperial & metric

Switch units instantly for any project, anywhere.

Popular calculators

Start with the tools homeowners and contractors use most.

Concrete Calculator

Estimate the cubic yards (or meters) of concrete and the number of bags you need for a slab, footing, or patio.

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Roofing Calculator

Estimate roof area, squares, and shingle bundles from your home's footprint and roof pitch.

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Roof Pitch Calculator

Convert roof rise and run into pitch (X:12), roof angle in degrees, and the area multiplier.

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Flooring Calculator

Calculate the square footage, number of boxes, and cost of flooring for any room, with a waste allowance.

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Vinyl Plank Flooring Calculator

Calculate how much luxury vinyl plank (LVP) flooring you need — square footage, boxes, and installed cost with a waste allowance.

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Tile Calculator

Work out how many tiles you need for a floor or wall, including a cutting allowance.

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Paint Calculator

Estimate how many gallons or liters of paint you need for a room, including coats and openings.

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Exterior Paint Calculator

Estimate how many gallons of exterior paint you need for your home's siding, including coats and openings.

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Drywall Calculator

Estimate drywall sheets, joint compound, tape, and screws for a room from its dimensions.

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Drywall Mud Calculator

Estimate the joint compound (mud), tape, and buckets you need to finish a drywall project by area and finish level.

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Mulch Calculator

Find how many cubic yards or bags of mulch you need to cover a garden bed at any depth.

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Topsoil Calculator

Find how many cubic yards or bags of topsoil you need to fill a bed, level a lawn, or top-dress at any depth.

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Sod Calculator

Calculate how much sod you need — square footage, pieces, and pallets — to lay a new lawn, with a waste allowance.

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Asphalt Calculator

Estimate the tons of asphalt needed to pave a driveway or lot at any thickness.

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Gravel Calculator

Calculate cubic yards and tons of gravel for a driveway, path, or drainage project at any depth.

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Insulation Calculator

Estimate the square footage, material, and cost to insulate walls or an attic by insulation type.

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Siding Calculator

Estimate the wall area, squares, and installed cost of siding for your home's exterior.

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Deck Calculator

Estimate deck boards, joists, screws, and cost for a new deck from its dimensions and board size.

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Fence Calculator

Estimate posts, sections, rails, and concrete for a new fence from its length and post spacing.

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Browse by category

Every calculator and guide, organized by the kind of project you're planning.

Accurate material estimates for any home improvement project

Every renovation, repair, and DIY project starts with the same question: how much material do I need? Order too little and you're back at the store mid-job; order too much and you've wasted money. HomeCalcify's free calculators replace the guesswork with fast, reliable math — giving you quantities, material counts, and a cost estimate in seconds.

Whether you're pouring a concrete slab, re-roofing with shingles, laying new flooring, painting a room, or mulching the garden, there's a purpose-built tool for the job. Each calculator shows the exact formula it uses and a step-by-step manual method, so you can check the numbers yourself and learn how the estimate works.

Built for homeowners, DIYers, and contractors

Our tools support both imperial and metric units and build in adjustable waste factors — the same allowances the trades use to account for cuts, spillage, and uneven surfaces. Browse the full calculator library, explore a project category, or read our practical how-much-do-I-need guides to plan and budget with confidence.

Frequently asked questions