CubicTally.My project ↗
Phoenix–Mesa–Chandler

Gravel French drain cost
in Phoenix.

Estimate aggregate for a rectangular or trapezoidal drainage trench. Start with the published examples below, then use your own supplier quote for a delivered estimate.

3/8-inch pea gravel — $42 per US ton

Material price. Published Phoenix-area supplier material rate per ton. Confirm product density, gradation, cleanliness, and suitability for your design.

The linked delivery matrix lists 1–2-ton fees of $100–$300 across Zones 1–5; 15+ tons range from free in Zone 1 to $110 in Zone 5. Phoenix spans several zones. Confirm the exact zone, minimum, truck capacity, and taxes.

AZ Rock Express · checked 2026-09-14 ↗
MEASURE. PLAN. BUILD.

Make it your estimate.

Set your dimensions below. Choose a published supplier price above, or enter your own quote.

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01

Your dimensions

YOUR TRENCH IN 3DIllustrative · not to scale
Top width 12 ftLength 20 ftBottom width 6 ftDepth 4 in
Aggregate layerDepth exaggerated for clarity
Allow a little extra

For uneven ground, spillage, and the unexpected.

02

Bagged or bulk?

Same project. Two ways to get it done.

THE BAGGED APPROACH
126 bags

6,300 lb to transport and handle.

Material estimateAdd your price
THE BULK APPROACHLess handling
2.5 cubic yards

1 estimated load at your truck capacity.

Bulk estimateAdd your price

Prices are optional. Tax and additional charges are included only when explicitly entered or covered by the saved terms. Placement labor is excluded. Estimates are not supplier quotes.

User-entered supplier prices; delivery and tax require confirmation. No detailed supplier conditions were saved. Confirm delivery and other charges before ordering.

Product

Density and bag values are editable planning assumptions. Confirm the product label or supplier specification.

Reinforcement quantities follow your inputs, not a structural design. Base volume excludes its own waste and compaction. Trench fill does not subtract pipe displacement.

Saving a reference preserves your inputs. Apply individual values only when they match the product you will buy.

  • Density: 1.4 US tons/yd³ — unverified planning assumption; confirm for this product.
  • Bag yield: 0.5 ft³; bag weight: 50 lb; confirm the selected bag product.
  • Shrinkage: 0% — entered planning allowance; no product-specific compaction rate verified.
Price and delivery
Choose a supplier

These are product-specific examples, not regional averages. Applying one sets the listed unit rate. Review delivery, minimum-order and density terms before using the totals. Editing the unit rate switches to manual quote mode.

3/8-inch pea gravel · $42.00/US ton

Material price. AZ Rock Express — Published Phoenix-area supplier material rate per ton. Confirm product density, gradation, cleanliness, and suitability for your design.

The linked delivery matrix lists 1–2-ton fees of $100–$300 across Zones 1–5; 15+ tons range from free in Zone 1 to $110 in Zone 5. Phoenix spans several zones. Confirm the exact zone, minimum, truck capacity, and taxes.

Reviewed applications: Gravel French drain.

Source · checked 2026-09-14 ↗

Set an optional weight capacity under Supplier order terms; loads use whichever volume or weight limit is lower. Confirm the payload limit and material density with your supplier. Short-load fees apply to each load below your threshold. Base material and rebar costs are excluded.

Entered delivery fees: $0.00 · Short-load fees: $0.00

Supplier order terms

Amounts are flat dollar charges for this order. Leave unknown charges blank; enter zero only when confirmed. Weight limits use your entered density. Choosing another supplier clears these quote fields and the delivery location.

Your entered unit price, rounding, delivery, and short-load assumptions apply. Saved supplier minimums and brackets are not automatically enforced in manual quote mode.

Additional project costs

Destination and timing identify a delivery you plan to share. They do not establish supplier service eligibility. Combined orders are chosen below after saving sections.

Labor, equipment and other project items

All added item prices are your estimates, not researched local rates. Include applicable taxes in these unit prices. Blank charges remain unknown; enter zero only when confirmed. Save the section to update the project budget.

03

Your project, together

0 / 50 sections

Loading your saved project…

A GOOD ESTIMATE STARTS HERE

Know what goes
into your numbers.

Every estimate shows its assumptions. Adjust waste, material density, and delivery rules to match your job. Use your supplier’s actual prices for a more useful comparison.See how we calculate

FROM MEASUREMENTS TO AN ORDER

Plan your gravel french drain

What to measure

  1. Measure trench length, top width, bottom width and fill depth. Use the rectangular trench shape when the widths are equal.
  2. Split changing trench dimensions into sections. The displayed gross fill does not automatically subtract pipes or other buried components.

Worked example: 40 ft long × 2 ft top × 1 ft bottom × 18 in deep

40 × ((2 + 1) ÷ 2) × (18 ÷ 12) ÷ 27 = 3.3333 yd³ before allowance and pipe displacement.

5% waste · 0% shrinkage

Neat volume
3.3333 yd³
Volume with allowances
3.5 yd³

Illustrative dimensions and allowances. Use your project specification and supplier’s product data. Quantities shown are before supplier rounding and pipe displacement.

Included in this quantity

Gross aggregate fill for a uniform trapezoidal trench, plus waste.

Measure or price separately

Pipe displacement, pipe, fabric, fittings, outlets, excavation and reinstatement.

Choose the specified product

Use the aggregate required by the drainage design. Do not substitute a fines-rich compactable base simply because its price is lower.

Before booking the order

Confirm aggregate grade, pipe and outlet requirements with the installer. Pipe length and drainage slope are not designed by this estimator; reconcile displacement before placing an order.

General product and ordering reference: NDS — French Drain Installation Guide · checked 2026-09-14. Worked quantities are CubicTally examples.

General drainage installation guidance; not a site-specific drainage design or local material offer. Any local prices on this page are attributed separately to the suppliers offering them.