Verify the driveway section
Confirm compacted thickness, base preparation, mix type, drainage, and access with a local paving professional.
Continue planning
How the calculation works
We use 145.2 lb/ft³ FHWA planning value.
Formula: driveway length × width × compacted depth × 145.2 lb/ft³ ÷ 2,000
Worked example
A 40 × 12 ft driveway at 3 in compacted depth needs about 9.6 tons with 10% waste.
Measure the finished driveway
Use the paved length and average width, splitting aprons or turnarounds into separate rectangles when needed.
Frequently asked questions
Is the aggregate base included?
No. This estimate covers the asphalt layer; calculate and order the base separately.
Can I use loose asphalt depth?
No. Enter the intended compacted depth because loose material settles during rolling.
Sources and assumptions
FHWA Federal Lands hot-mix unit weight with driveway-specific measurement guidance.
Last reviewed: August 14, 2026. Read the methodology and sources.