Driveway planning tool
Asphalt Driveway Calculator
Measure each rectangular part of your driveway, choose a compacted asphalt thickness, and get the quantity to discuss with a paving supplier. Results include area, volume, US tons, metric tonnes, and an optional order allowance.
Project inputs
Results update as you type
Use only for repeated sections with the same dimensions.
145 lb/ft³ is a planning default, not a universal mix density.
Payload and legal limits vary by truck and route.
Estimated results
Asphalt to order (5% allowance)
11.42 US tons
Metric tonnes
10.36 tonnes
Total area
600 ft² · 66.67 yd² · 55.74 m²
Compacted volume
150 ft³ · 5.56 yd³ · 4.25 m³
Base quantity before allowance
10.88 US tons
Truckloads at 20 tons/load
1 estimated load
Uses 145 lb/ft³ (2,323 kg/m³). Quantity is a planning estimate; verify mix density, compacted thickness, loads, and order minimums locally.
Formula
Unit conversions are completed before multiplication, then results are formatted only at display time to avoid cumulative rounding.
Example calculation
A 30 ft × 20 ft driveway paved 3 in thick has 600 ft² of area and 150 ft³ (5.56 yd³) of compacted volume.
At 145 lb/ft³, it requires about 10.88 US tons before waste. A 5% allowance raises the planning order to about 11.42 tons.
How to use this calculator
- 1Split curves, turnarounds, and parking pads into rectangles, then count or add the sections.
- 2Enter finished length and width—not the dimensions of the delivery pile.
- 3Select a compacted thickness preset or type a custom value from the project specification.
- 4Confirm density with the asphalt plant and add only the waste allowance appropriate to the site.
Choosing a driveway thickness
The 2, 2.5, 3, and 4 inch controls are planning scenarios, not universal construction requirements. A light-duty overlay over a sound surface is a different design from new pavement over soil. The supporting base often matters as much as the asphalt layer.
Traffic, drainage, climate, subgrade strength, base depth, and local requirements all affect the finished section. Ask a local paving contractor or engineer to specify structural thickness before ordering material.
Measure irregular driveways without guessing
For an L-shaped drive, calculate the stem and parking apron separately. Avoid using the longest length times the widest width because that includes unpaved corners. The calculator's area count is useful for repeated bays of the same size; use the general calculator for differently sized sections.
Measure the paved limits after any widening is marked. Small errors affect tonnage more at greater thicknesses, so verify dimensions before arranging a non-returnable hot-mix delivery.
Density, compaction, and truckloads
The default 145 lb/ft³ is a practical compacted hot-mix planning value. Actual density changes with aggregate, binder content, air voids, and the degree of compaction. Use a mix-specific value from the supplier when available.
Truckloads are shown using an editable planning assumption of 20 US tons per load. Legal payload, truck type, haul conditions, and plant policy vary, so use that result only to discuss delivery scheduling.
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OpenFrequently asked questions
How much asphalt do I need for my driveway?
Multiply the accurately measured driveway area by compacted thickness, then multiply volume by the supplier's compacted density. Add a measured allowance for edges and site losses only after calculating the base quantity.
How many tons of asphalt are in a driveway?
There is no fixed amount. At 145 lb/ft³, a 600 ft² driveway at 3 inches thick uses about 10.88 US tons before waste; changing area, thickness, or density changes the result.
How thick should driveway asphalt be?
It depends on soil, base, drainage, climate, vehicle loads, and local practice. Presets compare material quantities but do not replace a pavement design from a qualified local professional.
How many square feet will one ton cover?
At 145 lb/ft³, one US ton covers about 82.8 ft² at 2 inches, 66.2 ft² at 2.5 inches, 55.2 ft² at 3 inches, or 41.4 ft² at 4 inches.
How much extra asphalt should I order?
A small 5–10% planning allowance is common for measurement uncertainty and edge work, but the right amount depends on layout and supplier rules. Avoid adding waste twice if a contractor already includes it.
What density should I use?
Use the compacted density for the specified mix. If it is not yet available, 145 lb/ft³ (about 2,322 kg/m³) is a clearly labeled planning default, not a universal value.
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