NORTHERN UTAH · ESTABLISHED 2006 CALL 801·661·7000 · ASK FOR PEAK
Request Quote
Home · Calculators · Footings & Piers

FOOTING & PIER
CALCULATOR.

For deck posts, fence posts, pergolas, foundation piers — calculate concrete volume and cost for cylindrical piers (sonotubes) or rectangular footings.

Your Footings

Wasatch Front frost line is 30-36" — set footings BELOW that or they'll heave in winter. Park City: 48"+.

in
in
ea
Your Footings

6 × 12" cylinder × 36"

Per-Footing Volume
0.07
cubic yards each
Total Volume
0.42 cy
11.3 cubic feet total
If You DIY (Bags)
26 × 60lb
or 19 × 80lb bags
Material Only (Bags)
$130 – $170
Bagged premix typically $5-$7 per 60lb bag at hardware stores.
Peak Concrete Install (with bracketing)
$1,200 – $2,400
Includes auger drilling, sonotube placement, rebar, pour, post-base brackets.
Get a Real Quote → Call 801-661-7000
Pro Tip

Always set footings BELOW the local frost line. Wasatch Front: 30-36". Park City and high-elevation foothills: 48"+. Above-frost footings heave every winter and lift whatever's bolted to them.

Footing Calculator FAQ

FOOTING QUESTIONS.

How deep should footings be in Northern Utah?

Wasatch Front frost line is 30-36 inches. Footings need to extend BELOW that or seasonal frost heave will lift them. Park City and high-elevation foothills require 48+ inches.

What size footing for a deck post?

Standard residential deck posts: 12" diameter, 36-48" deep. Heavier loads (multi-story decks, large pergolas): 16-24" diameter. Engineered structures follow specific spec.

Sonotube or rectangular footing?

Sonotubes (cardboard cylindrical forms) are easiest for posts and piers. Rectangular footings are needed for spread loads — supporting walls, larger structures, or bearing on soft soil.

Do I need rebar in footings?

For most residential post footings, no. For structural piers supporting decks, pergolas, or any load-bearing structure, yes — typically two #4 vertical bars with horizontal ties.

Can I pour footings in winter?

Generally no — frozen ground prevents proper compaction and the concrete won't cure. We pour September-October at the latest, then resume in April.

What about post brackets vs setting posts in concrete?

Always use galvanized post brackets bolted to a cured footing. Burying wood posts directly in concrete causes rot at the soil line within 5-10 years.

READY FOR A REAL QUOTE?

Free on-site consult. Itemized quote within 48 hours.

Request a Quote Call 801-661-7000