Bulk delivery or bags? Compare the actual purchase

An original worked comparison of yardage, rounded bags, delivery and supplier weight conversions.

A low price per cubic yard is not automatically the cheapest way to buy a small load. Compare the actual rounded order and delivery terms, then consider whether you can unload and move it. This example uses invented prices to show the arithmetic, not current retail quotes.

Start with volume, not price

Suppose two non-overlapping areas use the same material: a 10 × 8 ft bed at 3 in and a 6 × 4 ft bed at 2 in. Their volumes are 0.740741 and 0.148148 cu yd. Together they need 0.888889 cu yd before a chosen allowance. At 10% extra and factor one, the order is 0.977778 cu yd or 26.4 cu ft.

At 0.5 cu ft per bag, that is 52.8 bags, so the actual purchase is 53 individually sold bags. If the supplier requires packs of 10, enter that pack size: the purchase becomes 60 bags rather than 53. Rounding each section separately can create a different total. Pool unrounded volumes for the same material, then round the purchase once.

Use the same cost scope

This first example assumes bag pickup with no delivery charge entered. It favors bulk on the entered costs but excludes tax, vehicle hire and handling time. If bags will be delivered, enter that quote separately in the multi-area planner. If the supplier has a two-yard minimum, replace the bulk quantity with two: that quote becomes $205 before tax. Open Supplier minimums and package sizes in the multi-area planner and enter 2 in Minimum bulk order to reproduce that quote. A bulk increment rounds up to a multiple of that amount after the minimum; leave it at zero if no increment applies.

A useful delivery break-even

Using the first example, the delivery charge at which both entered subtotals match is $265 − (0.977778 × $60) = $206.33. Below that charge, bulk has a lower entered subtotal; above it, bags do. This is not a universal threshold: change the prices, bag yield or minimum load and it moves.

Check a delivery charge that reverses the choice

Keep the same quantities and material prices, but change bulk delivery to $225. Bulk becomes $58.67 + $225 = $283.67. Against $265 of bags collected without an entered delivery charge, bags are $18.67 less. Now enter $40 for bag delivery: the bag total becomes $305, so bulk is $21.33 less. Neither quantity changed; omitting a delivery line changed which option looked cheaper.

The bulk delivery break-even with that $40 bag delivery is $305 − $58.67 = $246.33. The worksheet calculates this threshold from unrounded values, after supplier minimums and package rounding. A zero charge is an assumption to confirm with the seller, not a claim of free delivery. Add delivery only once if it is already included in a unit quote.

Try both delivery scenarios in the multi-area worksheet. Enter the two areas above, bag yield 0.5, allowance 10%, factor 1, bulk price 60 and bag price 5; then vary the two delivery fields.

When the bulk quote uses tons

Ask the seller for the conversion for the exact product and moisture basis. If they supply 1.4 US short tons per cubic yard for this hypothetical order, the mass estimate is 0.977778 × 1.4 = 1.368889 US tons. A US short ton is 2,000 lb; a metric tonne is different. Do not copy a conversion from mulch to gravel or from fine aggregate to large decorative rock.

Convert a per-ton quote before entering a per-yard price

The multi-area planner’s bulk price input is USD per cubic yard. If the seller quotes an illustrative $45 per US short ton and confirms 1.4 US short tons per cubic yard for this product, enter 45 × 1.4 = $63 per cubic yard, not 45. For the 0.977778 cu yd example above, material is $61.60 and $85 delivery gives $146.60. Entering 45 as the per-yard price would incorrectly show $129.00, understating this order by $17.60.

The optional density field reports weight; it does not change the currency unit of the bulk-price field. A minimum stated in tons also needs conversion: a 2-US-ton minimum at that density is 2 ÷ 1.4 = 1.428571… cu yd. At $45 per ton the minimum material charge is $90, or $175 with that delivery. Use the seller’s actual invoiced weight/volume and rounding when confirming the quote. If the seller cannot provide a suitable conversion, retain the ton-based written quote as a separate comparison instead of inventing a density. Do not convert a delivered all-in quote and then add its delivery again.

Check handling before paying

Record where a truck can tip the load, whether a street placement is permitted, how you will protect adjacent surfaces, and how far material must be moved. Bagged material may be easier to stage in a narrow site, while many heavy bags can still be impractical. The comparison is a purchasing worksheet, not a vehicle payload or manual-handling assessment.

Use any volume calculator’s Multi-area purchase planner to reproduce this example and export the area rows. Start with pea gravel, river rock or mulch. Then ask the supplier to confirm the product, units and delivery terms using the quote checklist.

Original worked examples by YardTakeoff · Revised October 11, 2026. Method and limitations.

When a project contains different materials

Do not combine base and surface gravel into one purchasing quantity merely because both are measured in yards. The two-layer driveway worksheet keeps footprints, conversions, minimums, buying increments and prices separate. It also lets you omit the base for a surface-only top-up. Allocate a shared delivery quote once across the lines.