Calcula tu Proyecto
Calculators for home and garden projects
Estimate paint, concrete, gravel, sand, soil, mulch, tile, and flooring in seconds. Enter your measurements and get how much material to buy, with clear formulas, examples, and support for metric and American units.
Our calculators
Tools for every type of material
Specialized calculators to plan construction and gardening purchases. Each one shows the formula, a practical example, and frequently asked questions.
Paint Calculator
Liters or gallons and cans based on walls, coats, and coverage.
Open calculator →Concrete Calculator
Bags and volume for slabs, footings, and columns.
Open calculator →Gravel Calculator
Volume, weight, and tons for paths and bases.
Open calculator →Sand Calculator
Amount and weight of sand for construction and mixes.
Open calculator →Soil/Substrate Calculator
Liters and bags for garden beds and pots.
Open calculator →Mulch Calculator
Bags of mulch or ground cover based on area and depth.
Open calculator →Tile Calculator
Pieces and boxes for floors and walls, with waste.
Open calculator →Flooring Calculator
Boxes of laminate, vinyl, or wood based on the area.
Open calculator →How it works
Three steps to get your estimate
Enter measurements
Provide your project dimensions in metric or American units.
Adjust parameters
Set waste, coverage, density, or other values based on your product.
Get the result
Receive the approximate quantity of material to buy, rounded up to whole units.
Why use them
Clear estimates, no signup, in your browser
Planning how much material you need before buying avoids two costly problems: running short mid-project or overpaying for leftover material. These calculators turn your measurements into concrete purchase amounts —bags, cans, boxes, pieces, liters, or tons— applying the same criteria professionals use.
- Metric (Europe/LatAm) and American (US) measurement systems
- Estimates based on industry standards
- No signup or personal data required
- Instant calculations, right in your browser
- Optimized for mobile and desktop
Why round up?
Materials sold by the unit —cement bags, paint cans, soil bags, tile boxes— can't be bought in fractions. So after applying the waste margin, the result is rounded up to the next whole unit. That way you make sure you have enough to finish the job without interruptions.
The waste is an extra percentage (typically 5-10%) that covers real job-site losses: cuts, spills, uneven ground, and touch-ups. You can adjust it in each calculator.
Practical guides
Plan the whole project, not just one material
The calculators answer “how much do I buy of this material?”. The guides answer the question that comes before: how to plan a complete project — quantities, budget, work order, and the mistakes to avoid.
Materials for a patio, start to finish
One 4×3 m patio worked through 5 calculators: gravel, concrete, tile, soil, and mulch.
Read guide →What a concrete slab costs
The 5 line items with quantities solved, ready for your local prices.
Read guide →Garden makeover: soil, mulch, gravel
Zone-by-zone calculation with shopping list and work order.
Read guide →The 7 most expensive buying mistakes
Units, waste, batches, delivery — what formulas can't catch.
Read guide →Frequently asked questions
About the calculators
Are the calculators free?
Yes. All Calcula tu Proyecto tools are free and require no signup. They work directly in your browser.
How accurate are the estimates?
The calculators use standard geometric formulas and industry reference values. The result is a purchase estimate: the actual amount can vary by product brand, coverage, compaction, cuts, and project conditions. For important work, always check the technical sheet or consult a professional.
Can I use feet and inches?
Yes. Each calculator has a measurement system selector. Choose "American (US)" to work in feet, inches, gallons, pounds, and cubic yards, or "Metric" for meters, centimeters, liters, kilograms, and cubic meters.
Do you store my data?
No. All calculations happen locally in your browser. The data you enter is not sent to any server or stored permanently.