How Much Road Base for 150 Square Feet?
How much road base for 150 square feet depends on depth. At 6 inches you need about 2.78 cubic yards, roughly 4.2 tons at 1.5 tons per yard. At 4 inches the order drops to 2.8 tons.
Volume and tonnage calculator →Road base for 150 sq ft by depth
| Depth | Cubic yards | Tons | Tons +10% |
|---|---|---|---|
| 4 in | 1.85 | 2.8 | 3.1 |
| 6 in | 2.78 | 4.2 | 4.6 |
| 8 in | 3.70 | 5.6 | 6.1 |
Working it out
- 150 sq ft × (6 ÷ 12) ft = 75.0 cubic feet.
- ÷ 27 = 2.78 cubic yards.
- × 1.5 tons per yard = 4.2 tons.
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. Most suppliers will quote 1.4 to 1.65 compacted tons per yard for this material.
Ordering checklist
- Measure odd shapes in pieces. Split curves and L-shapes into rectangles and add them.
- Add a margin. About 10 percent covers compaction and low spots.
- Bulk or bags. Bulk delivery is the practical choice here.
- Prep first. Remove sod, compact the subgrade and set edging before the stone arrives.
Use the volume and tonnage calculator for any other size.
Good and poor uses for road base
Works well for:
- 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 8x16 area at 4 inches takes about 2.4 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.
- Assuming every supplier uses the same weight. Two yards selling the same product name can quote different tons per yard.
- Ignoring the base. A thin surface layer over soft soil fails early no matter how much material is on top.
- Mixing up cubic yards and tons. Yards are volume, tons are weight; convert with the product’s weight per yard.
Questions people ask
How many tons of road base for 150 square feet?
About 4.2 tons at 6 inches deep.
How many cubic yards of road base for 150 square feet?
About 2.78 yards at 6 inches.
How much road base for 150 square feet at 4 inches?
About 2.8 tons, or 1.85 cubic yards.
How much does a yard of road base weigh?
About 1.4 to 1.65 compacted tons.
Should I add extra?
Yes, about 10 percent is a common allowance.
Related guides
- Crushed Stone vs Gravel: Differences and Best Uses
- Tons to Cubic Yards for Gravel: Conversion Chart
- How Much Does a Ton of Gravel Cover? Depth Chart
- How Much Road Base for 100 Square Feet?
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