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.
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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.
OpenRoofing Calculator
Estimate roof area, squares, and shingle bundles from your home's footprint and roof pitch.
OpenFlooring Calculator
Calculate the square footage, number of boxes, and cost of flooring for any room, with a waste allowance.
OpenTile Calculator
Work out how many tiles you need for a floor or wall, including a cutting allowance.
OpenPaint Calculator
Estimate how many gallons or liters of paint you need for a room, including coats and openings.
OpenDrywall Calculator
Estimate drywall sheets, joint compound, tape, and screws for a room from its dimensions.
OpenMulch Calculator
Find how many cubic yards or bags of mulch you need to cover a garden bed at any depth.
OpenAsphalt Calculator
Estimate the tons of asphalt needed to pave a driveway or lot at any thickness.
OpenGravel Calculator
Calculate cubic yards and tons of gravel for a driveway, path, or drainage project at any depth.
OpenInsulation Calculator
Estimate the square footage, material, and cost to insulate walls or an attic by insulation type.
OpenSiding Calculator
Estimate the wall area, squares, and installed cost of siding for your home's exterior.
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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.
Popular guides
All guides →How Much Concrete Do I Need?
Learn how to calculate how much concrete you need in cubic yards or bags, with formulas, examples, and a coverage chart.
Concrete Bag Coverage Chart
A quick reference chart for how much volume each size of concrete bag yields and how many bags make a cubic yard.
How Much Mulch Do I Need?
Calculate mulch in cubic yards or bags based on your bed size and depth, with a coverage reference.
How Much Paint Do I Need?
Estimate paint by room size, coats, and openings, with coverage rates and pro tips.
Flooring Installation Cost Guide
What flooring costs by material and how to estimate your project budget per square foot.
How Many Tiles Do I Need?
Calculate tile counts for floors and walls, including waste for cuts and patterns.