Adjustable pedestal support count

Deck Pedestal Calculator

Estimate adjustable deck or paver pedestal supports from the deck area and support spacing. Use it for pedestal calculator searches, rooftop deck planning, raised pavers, and supplier order counts.

Units

Deck or paver field length (ft)Deck or paver field width (ft)Target support spacing (ft)Waste / edge extras (%)Cost per pedestal ($)

Pedestals to buy

Support grid

Actual spacing

Rough cost

Pedestal decks need product and load checks

This is a support count estimate only. Pedestal system rating, paver or tile size, deck boards, edge restraint, wind uplift, roof membrane protection, drainage, slope, and local code must be checked before installation.

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Deck pedestal formula

Grid columns = ceiling(deck length ÷ support spacing) + 1

Grid rows = ceiling(deck width ÷ support spacing) + 1

Base pedestals = grid columns × grid rows

Pedestals to buy = base pedestals × (1 + waste %)

Sample takeoff

A 16 ft by 12 ft raised deck with pedestals spaced about 2 ft apart lays out a 9 by 7 grid, or 63 supports. With 10% waste, order about 70 pedestals.A 4.8 m by 3.6 m raised deck with pedestals spaced about 0.6 m apart lays out a 9 by 7 grid, or 63 supports. With 10% waste, order about 70 pedestals.

Deck Pedestal Calculator FAQ

How do I calculate deck pedestals?+

Divide length and width by your target support spacing, round each up, add one support line at each edge, then multiply rows by columns.Divide length and width by your target support spacing, round each up, add one support line at each edge, then multiply rows by columns.

Can I use this for rooftop pavers?+

Yes for a first support count, but pedestal height, slope correction, wind uplift, membrane protection, and product load ratings must be checked.Yes for a first support count, but pedestal height, slope correction, wind uplift, membrane protection, and product load ratings must be checked.

Does this choose pedestal spacing?+

No. Enter the spacing required by your paver, tile, joist, or pedestal manufacturer.No. Enter the spacing required by your paver, tile, joist, or pedestal manufacturer.