What this gravel driveway calculator calculates
A 20 × 40 ft driveway at 6 in compacted depth contains 400 ft³, or 14.81 yd³, before waste.
Formula
Driveway area × compacted depth = volume; volume × aggregate density = planning weight; add waste before ordering.
Worked example
With 10% waste, 14.81 yd³ becomes 16.30 yd³. At 2,800 lb/yd³, the planning weight is about 22.8 tons, subject to moisture and compaction.
Ordering decision
Order each base layer by the supplier's stated compacted or loose-volume convention. Compaction changes the delivered quantity.
The page cites the applicable Uzi Tools reference table beside the calculator. Product labels, current editions, local code, and a licensed professional govern structural, electrical, and life-safety work.
How to use it
- Enter the measured dimensions and keep the displayed units beside each field.
- Review the gravel for a driveway base result and the substituted formula before ordering.
- Adjust waste for the layout, cut pattern, product package, and site conditions.
- Copy or print the material list, then verify the cited product data and local requirements.
Gravel for a driveway base
Use this driveway gravel calculator for compacted aggregate layers, with length, width, depth, density, and waste. Keep each base layer separate when depths or materials differ.
Limits and professional review
Measurements, product yield, waste, moisture, and site conditions can change the order quantity. Local code and a licensed professional govern structural and electrical work.