12 Cubic Yards of Road Base in Tons
12 cubic yards of road base in tons works out to about 18.0 tons using a planning weight of 1.5 tons per yard. Real loads land between roughly 16.8 and 19.8 tons depending on stone size, fines and moisture. That is about 36,000 pounds.
Volume and tonnage calculator →The conversion
- Yards × tons per yard: 12 × 1.5 = 18.0 tons.
- Low end: 12 × 1.4 = 16.8 tons.
- High end: 12 × 1.65 = 19.8 tons.
The scale ticket on delivery day is the final word on weight.
What 12 yards covers
| Depth | Square feet |
|---|---|
| 4 in | 972 |
| 6 in | 648 |
| 8 in | 486 |
About road base
Road base is meant to be compacted at close to the right moisture. Dry base rock does not lock up well; a light spray of water before rolling helps.
Hauling 12 yards
At about 18.0 tons, this is more than one typical truckload. A pickup is a poor fit for anything past a fraction of a yard; see how much gravel a half-ton pickup can carry.
Before you order
- Confirm whether the yard prices road base by the ton or by the yard.
- Add about 10 percent for compaction and uneven ground.
- Clear a firm spot for the truck to dump.
The volume and tonnage calculator converts any area and depth into yards and tons.
When to choose road base
Best suited to:
- Base under asphalt and concrete
- Gravel roads and drives
- Equipment and shed pads
Think twice for:
- Drainage layers
- Decorative surfaces
- Surfaces that will stay uncompacted
Quick reference numbers
- Per inch over 100 sq ft: about 0.46 tons of road base (0.31 cubic yards).
- Per inch over 1,000 sq ft: about 4.6 tons.
- Another size for comparison: a 14x28 area at 3 inches takes about 5.4 tons.
- Weight used here: about 1.5 tons per cubic yard.
Mistakes that throw off the order
- Using inches as if they were feet. Depth has to be divided by 12 before you multiply; skipping that step inflates the order twelvefold.
- Forgetting that compaction shrinks loose material. A loose 4-inch spread of a dense-graded stone may finish closer to 3 inches after rolling.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Measuring only the main rectangle. Aprons, turnouts and curved edges add real square footage.
Questions people ask
How many tons is 12 yards of road base?
About 18.0 tons, with a typical range of 16.8 to 19.8.
How many pounds is 12 cubic yards of road base?
About 36,000 pounds.
How much area does 12 yards of road base cover at 6 inches?
About 648 square feet.
Why does road base weight vary?
Stone size, the share of fines and moisture all change how much a yard weighs.
Is it better to buy by the ton or the yard?
Either works; just convert with the supplier’s own weight per yard so the two quotes compare fairly.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Yard of Crushed Stone Weigh?
- 10 Cubic Yards of Road Base in Tons
- 11 Cubic Yards of Road Base in Tons
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