How Much Crushed Stone for a 7x8 Hot Tub Pad?
A 7 by 8 foot hot tub pad covers 56 square feet. At 6 inches of crushed stone, plan on 1.04 cubic yards, or about 1.5 tons, which answers how much crushed stone for a 7x8 hot tub pad.
Volume and tonnage calculator →The math
- Area: 56.0 sq ft.
- Depth in feet: 6 ÷ 12 = 0.500 ft.
- Cubic yards: 56.0 × 0.500 ÷ 27 = 1.04 yd³.
- Tons: × about 1.4 tons per yard = 1.5 tons.
The crushed stone calculator does this for any size.
Related: How Much Gravel for a 7x8 Hot Tub Pad?
Crushed stone needed by depth
| Depth | Cubic yards | Tons of crushed stone | Tons +10% |
|---|---|---|---|
| 4 in | 0.69 | 1.0 | 1.1 |
| 6 in | 1.04 | 1.5 | 1.6 |
| 8 in | 1.38 | 1.9 | 2.1 |
Hot Tub Pad tips
A filled hot tub can weigh several tons, so the pad must be level and compacted solid. Many manufacturers accept a compacted stone base for some models, while others require concrete; follow your tub’s install guide, since that affects the warranty.
Related: How Much Crushed Stone for a 10x10 Hot Tub Pad?
Prep
Remove sod and roots, level the area and slope it slightly for drainage. Install edging so the stone stays inside the footprint.
Getting it delivered
Small dump trucks commonly carry around 5 to 10 tons and tri-axles more, but loads vary by truck and state, so ask the yard what fits in one trip. Crushed stone has angular faces that lock together under a compactor, which is why it holds a pad shape. Round up by about 10 percent for compaction and uneven ground.
Measuring the area
Use a long tape and measure each side twice. If the ground slopes, measure depth at the high and low ends and average them. Irregular outlines can be broken into simple rectangles, triangles and circles; add the pieces for the total square footage before converting to tons.
Tools for the job
A flat shovel, a steel rake, a wheelbarrow and a rented plate compactor cover most residential pads. A landscape rake or the back of a rake levels the top layer, and a long straightedge or a level string shows high and low spots before the final pass.
Questions people ask
How many tons of crushed stone for a 7x8 hot tub pad?
About 1.5 tons at 6 inches deep.
How many yards of crushed stone for a 7x8 hot tub pad?
About 1.04 cubic yards.
How many tons of crushed stone are in a cubic yard?
Roughly 1.4 tons for planning, but suppliers vary with stone size and moisture.
Do I need to compact it?
Yes for anything that carries weight. Compact in lifts of a few inches with a plate compactor.
Related guides
- Gravel Pad for a Hot Tub: Size, Depth, and Base
- Concrete Slab for a Hot Tub: Size, Thickness, Yards
- How Much Does a Ton of Gravel Cover? Depth Chart
- Tons to Cubic Yards for Gravel: Conversion Chart
- Crushed Stone vs Gravel: Differences and Best Uses
- Geotextile Fabric for Driveways: Woven vs Nonwoven and How Much You Need
- Compacting a Driveway Gravel Base in Lifts
- How Much Gravel for a 7x7 Hot Tub Pad?
- How Much Crusher Run for a 7x8 Hot Tub Pad?
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