Paver Calculator
Estimate pavers, base material, and bedding sand from your project dimensions and paver size. Adjust the waste allowance to match your layout and cutting pattern.
What is the paver calculator?
Estimate pavers, base material, and bedding sand from your project dimensions and paver size. Adjust the waste allowance to match your layout and cutting pattern.
How to use the calculator
Measure the length and width of the installation area in feet. Then enter the actual length and width of one paver in inches. Finally, choose a waste allowance that reflects the layout: a simple straight pattern usually needs less extra material than a diagonal or highly cut pattern.
How to calculate the number of pavers
First calculate the project area by multiplying length by width. Next calculate the area of one paver by multiplying its two dimensions in inches and dividing by 144. Divide the project area by the paver area and round up. Apply the waste allowance after that calculation so the purchasing quantity accounts for cuts and breakage.
Paver base and bedding sand
A paver installation needs a properly prepared base and a bedding layer. This calculator lets you enter the base and bedding depths instead of hiding them inside the formula. Actual base depth depends on soil, drainage, climate, traffic, and the installation specification. Verify the required compacted depth before ordering material.
Choosing a waste allowance
A 10% allowance is a reasonable starting point for many simple layouts, but it is not a rule. Increase the allowance for diagonal patterns, curves, borders, irregular edges, or inexperienced cutting. For a very precise project, calculate the border and field pieces separately.
Common paver sizes
Common rectangular and square pavers include 4 × 8, 6 × 6, 6 × 9, 8 × 8, 12 × 12, and 12 × 18 inches. Always use the actual product dimensions because nominal sizes, joint spacing, and multi-piece patterns can change the coverage.
How to improve the accuracy of your estimate
Use the actual product dimensions, package coverage, material density, installed depth, and current local price whenever those values are available. Measure the project in smaller sections when the shape is irregular, and keep fixed costs separate from area-based quantities. For a large purchase, compare the calculator result with the supplier’s own coverage or takeoff before ordering.
Common mistakes to avoid
The most common errors are mixing inches and feet, using nominal dimensions instead of actual product dimensions, forgetting waste or overage, treating volume and weight as interchangeable, and assuming a universal installation depth. Enter the values from your actual product and project specification whenever possible.
Worked planning example
For a 20 × 20 ft patio using 12 × 12 in pavers, the project area is 400 sq ft. With a 4 in base, 1 in bedding layer, and 10% waste, the calculator estimates the paver count plus the corresponding base and sand volumes. Optional prices can turn the result into a material-only budget.
Useful Paver reference values
| Paver size | Approx. pieces per 100 sq ft |
|---|---|
| 4 × 8 in | 450 per 100 sq ft |
| 6 × 6 in | 400 per 100 sq ft |
| 6 × 9 in | 267 per 100 sq ft |
| 8 × 8 in | 225 per 100 sq ft |
| 12 × 12 in | 100 per 100 sq ft |
| 12 × 18 in | 67 per 100 sq ft |
Reference values are planning aids. Product specifications and local conditions take precedence.
Frequently asked questions
How many pavers do I need for a 10 × 10 patio?
A 10 × 10 patio has 100 sq ft. Divide 100 by the square-foot coverage of your paver, then add your chosen waste allowance. For example, a nominal 12 × 12 in paver covers about 1 sq ft before joints and waste.
How much extra should I order for pavers?
The right allowance depends on the pattern and the number of cuts. Around 10% is a useful starting point for a simple layout; diagonal, curved, or intricate patterns can require more.
How deep should a paver base be?
Base depth is site-specific. Soil, drainage, climate, and traffic affect the required compacted depth. Use the calculator as a quantity-planning tool and confirm the installation specification before excavation or purchase.
Does the calculator include polymeric sand?
The current result focuses on pavers, base material, and bedding sand. Jointing products should be estimated from the manufacturer coverage for the specific paver and joint width.
Can I use this calculator for an irregular project?
Yes, but the best approach is to divide the project into measurable sections and combine the results. Irregular edges, curves, openings, and changes in depth can make a single rectangular measurement less accurate.
What should I verify before buying materials?
Verify the product label or manufacturer coverage, actual dimensions, density or package yield, required installation depth, and supplier delivery terms. For structural or regulated work, also verify the project specification and local requirements.