How to calculate your pedestal pavers project
Pedestal paver systems use a regular panel grid with supports at panel corners. This calculator lays out full panels across a rectangular area, adds spare pavers, counts shared corner pedestals, and optionally adds a center support beneath every installed paver.
- Measure the finished rectangular deck, terrace, or rooftop area in both directions.
- Enter the installed paver dimensions and whether the selected system requires a center support under each panel.
- Confirm perimeter supports, spacer tabs, wind uplift, height range, slope correction, and load requirements with the system manufacturer.
Formula
The calculation
Rows and columns are rounded up from the project dimensions and paver dimensions. Installed pavers equal rows × columns. A basic shared-corner grid uses (rows + 1) × (columns + 1) pedestals, plus any selected center supports. Spare pavers are added separately.
Worked example
A 20 × 10 ft rectangle using 24 × 24 inch pavers creates a 10-by-5 grid with 50 installed pavers and 66 shared corner pedestals. Ten percent extra rounds the paver order to 56 pieces.
The result is a planning estimate. Round purchasing quantities up to available package sizes and confirm the exact product specifications.
Material assumptions
- The layout is a simple rectangular grid with aligned joints and one shared pedestal at each grid intersection.
- Cut pieces, perimeter conditions, staggered patterns, irregular boundaries, drainage, wind, seismic, load, and manufacturer-specific supports can change the count.
- This is a material-planning tool, not an engineered rooftop, deck, waterproofing, or pedestal-system design.
Read the complete calculator methodology for unit conversions, rounding rules, and limitations.
Why the waste factor matters
A waste or extra-material percentage allows for real-world variation: irregular edges, cuts, compaction, settling, spillage, and measurement error. Ten percent is a useful starting point, not a universal rule. Increase or reduce it according to the material, layout, and supplier guidance.
Unit conversions used
Questions
Pedestal Paver Calculator FAQ
How many pedestals do I need for pavers?
For a basic rectangular grid with shared corner supports, add one to the number of paver columns and one to the number of rows, then multiply those two totals. Add any manufacturer-required center, edge, or perimeter supports separately.
Do large-format pavers need a center pedestal?
Some sizes, materials, loads, and manufacturers require a center or supplemental support. Use the selected product's installation documents; the calculator lets you add one center support beneath every installed paver when required.
Can I use this for an irregular rooftop terrace?
Use it only as a first-pass quantity estimate. Irregular edges, penetrations, cuts, parapets, drains, wind zones, slope correction, and perimeter support details require a project-specific layout and manufacturer guidance.
Does the calculator include pedestal height?
No. Pedestal height and adjustment range depend on the finished elevation, substrate slope, transitions, drains, and system limits. Survey elevations and select compatible pedestal components separately.