Gravel French drain estimator. Estimate aggregate for a rectangular or trapezoidal drainage trench.
Built for real projects.No sign-up. No guesswork. 01
Your dimensions Feet & inches Metric
Project shape Rectangle / slab Circle / footing Rectangular trench Trapezoidal trench YOUR TRENCH IN 3D Illustrative · not to scale
Top width 12 ft Length 20 ft Bottom width 6 ft Depth 4 in Depth exaggerated for clarity
Allow a little extra For uneven ground, spillage, and the unexpected.
YOUR MATERIAL ESTIMATE
2.33 cubic yards
Includes 5% waste
Neat volume 2.22 yd³
Metric volume 1.78 m³
Estimated material weight 3.27 US tons
0.5 ft³ bags 126 bags
Rounded bulk order 2.5 yd³ Confirm yield, density, and order increments with your supplier before ordering.
Section name 02
Bagged or bulk? Same project. Two ways to get it done.
126 bags
6,300 lb to transport and handle.
Price per bag $
Material estimate Add your price
THE BULK APPROACH Less handling 2.5 cubic yards
1 estimated load at your truck capacity.
Bulk material price $/yd³
Bulk estimate Add 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.
Product specification reference No product reference selected 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. I have checked the density assumption for this product and order. 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.
Project application All applications — check product suitability Gravel driveway Gravel paver base Gravel French drain Supplier market All markets — check service area New York Los Angeles Chicago Dallas–Fort Worth Houston Atlanta Washington Miami Philadelphia Phoenix Boston Riverside San Francisco Detroit Seattle
3/8 or 3/4-inch crushed bluestone · $64.00/yd³ Material price. Lawton Adams — Supplier pickup price in Somers, Westchester County. Confirm product suitability and delivery area.
The published 6–9 yard local delivery bracket is $82 per yard. Outside-local-area and smaller orders require a separate quote.
Reviewed applications: Gravel driveway, Gravel French drain.
Source · checked 2026-09-14 ↗ Use price Number 3, screened 3/4-inch rock · $60.00/yd³ Material price. US Rock Corporation — Inglewood supplier listing for screened 3/4-inch rock, advertised for drainage. Confirm the aggregate meets your drain design.
Loose bulk material. Delivery and taxes are additional; obtain a jobsite quote. Coordinate orders of 16 or more cubic yards with the supplier.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price 2B stone · $40.00/US ton Material price. GSI Concrete — 2026 Pennsylvania supplier listing for 2B stone. Confirm clean aggregate size and suitability for the drainage design; the calculator density is illustrative.
Stone delivery lists $180 within 15 miles or $286 beyond 15 miles. Confirm the address, truck capacity, taxes, and minimum billable load.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price 6A gravel · $59.00/yd³ Material price. Lowrie’s Landscape — Published material listing at the Clarkston, Oakland County supplier. Confirm product grade and suitability; this is not a delivered Detroit quote.
Delivery requires at least 3 yards. Obtain the delivery charge, address coverage, availability, and taxes from the supplier.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price 7/8-inch drain rock · $68.00/yd³ Material price. Sky Nursery — Supplier pickup rate for full cubic yards. Half-yard pickup pricing differs. Confirm your material specification.
Listed delivered rate is $83 per yard, with a 12-yard gravel maximum. Delivery requires 10 total yards, in whole-yard increments; eligible mixed loads can meet that minimum. Distance/access fees may apply; confirm taxes and service area.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price Washed #6 river rock · $59.00/yd³ Material price. Behrens Landscaping — July 2026 homeowner material price snapshot for Chicago’s northwest suburbs. Verify product size and suitability for your specification.
The FAQ lists dump-truck delivery as a flat distance-based charge on top of material pricing, with taxes shown at checkout. Confirm the address-specific delivered total and order minimum.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price 3/4-inch washed limestone gravel · $174.99/yd³ Material price. Texas Garden Materials — Houston-area supplier material listing by the cubic yard. Confirm product suitability and current availability; installation is separate.
Delivery is additional and depends on destination and quantity. Obtain the delivered total and taxes before ordering.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price Sierra river rock, 3/4-inch · $146.00/yd³ Material price. Landscape Rock Direct — Listed bulk material rate for Riverside / San Bernardino County delivery. Confirm grade, cleanliness, and compatibility with your project specification.
Delivery is quoted separately based on destination, access, order size, and truck availability. Ask for minimums and a tax-inclusive total; listed discounts require eligibility confirmation.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price #57 stone · $68.00/US ton Material price. Green Landscape Supply — Undated online material list for the Atlanta-area supplier. Confirm the serving branch and current grade; aggregate rows explicitly use tons despite the table’s cubic-yard heading.
The page states a 3-yard delivery minimum and maximum loads of 20 yards for hardwood mulch or 10 tons for these aggregates. Confirm the minimum billable tonnage, delivery fee, taxes, and address coverage.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price Washed #57 stone — Northwest DC · $159.99/US ton Delivery-inclusive rate. Hawkins Landscape Supply — Published base unit rate for the Northwest DC delivery-area option. Sold by the ton, with a one-ton minimum in the product configuration. Confirm product density.
Standard delivery is included for this destination option. Quantity discounts and other areas can change the rate; confirm ZIP eligibility, access, taxes, and the final order total.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price Gray granite, 3/4-inch · $79.50/yd³ Material price. Ottr Landscape Supply — Published Boston delivery catalog price per cubic yard. Confirm product grade and suitability; supplier is delivery-only with no customer pickup.
Delivery is $100 per truckload within 30 miles of the dispatch office, then $4 per additional mile. The catalog states no minimum. Confirm truck capacity, ZIP pricing, taxes, and any site-access charges.
Reviewed applications: Gravel French drain.
Source · checked 2026-09-14 ↗ Use price 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 ↗ Use price #57 crushed rock — full cubic yard · $70.00/yd³ Material price. Tropical Garden Supply — Hollywood, Broward County supplier price for the full-cubic-yard option. Product is listed for driveways and drainage; confirm the required aggregate size.
Half-yard, bag, and 18-yard truckload options have different unit costs. Delivery is available and confirmed with the supplier; obtain destination charges, tax, and the final quantity price separately.
Reviewed applications: Gravel driveway, Gravel French drain.
Source · checked 2026-09-14 ↗ Use price 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
Additional project costs Purchase method for budget Bulk order Bags Delivery destination / site Delivery timing / batch
My manual bulk quote includes all applicable delivery, tax and supplier charges entered above. 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 Add labor or equipment item 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.
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A GOOD ESTIMATE STARTS HERE
Know what goes 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
2.33 yd³ incl. allowance Save section Home / Gravel / Gravel French drain Before you order The result is gross trench fill; subtract displaced pipe volume separately. Use aggregate appropriate to the drainage design. FROM MEASUREMENTS TO AN ORDER Plan your gravel french drain What to measure Measure trench length, top width, bottom width and fill depth. Use the rectangular trench shape when the widths are equal. 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.