Gravel Calculator
The compacted gravel base under your slab — how many cubic yards to order, and what it costs.
Gravel base calculator
You need
5.68 yd³
153.3 ft³ (compacted order)
Sizing the gravel base
A compacted gravel base spreads the load and lets water drain away from the underside of your slab. Because you buy gravel loose but place it compacted, you need to order a little extra — this calculator adds about 15% so you're not caught short.
Came here from the slab calculator? Your width and length are already filled in. Head back to the slab calculator to finish the pour.
Volumes use standard bag yields and a 10% waste allowance; costs are national US averages that vary by region, mix and finish. See our methodology for exactly how each figure is worked out, or check the reference sources: