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Generator Hut

Asphalt Calculator

Tons of hot mix for a driveway or parking area.

Your measurements

2 in for a residential drive surface course, 3 in or more for heavier use.

Compacted hot-mix asphalt runs about 2 tons per cubic yard.

Asphalt required

7.41tons

7.41 tons of hot mix

Area to surface50 ft × 12 ft
600 sq ft
Compacted volumeat 2 in deep
100 cu ft
In cubic yards
3.7 cu yd
Weight to orderat 2 tons per cubic yard
7.41 tons

This is the compacted depth, which is what you measure after rolling. Loose hot mix is laid roughly a quarter deeper than its finished thickness, so do not order to the loose figure.

Asphalt needs a compacted aggregate base beneath it — typically 4 to 8 inches depending on soil and load. Calculate that separately with the gravel calculator.

Hot mix has to be laid and compacted while it is hot, which in practice means a crew and a roller on the day it is delivered. This is rarely a realistic DIY material.

Enter the area and the compacted depth and it returns the tonnage. The critical distinction is that the depth is the finished, rolled thickness — loose hot mix goes down noticeably deeper than it ends up.

Why use this tool?

Compacted depth, stated

The figure asked for is the finished thickness after rolling, which is the one that matters and the one people confuse.

Adjustable density

Compacted hot mix runs about 2 tons per cubic yard, varying with mix design and aggregate.

Tons, the ordering unit

Asphalt is sold by weight. The volume figures are shown for checking, but tonnage is what you order.

Base course flagged

Asphalt over unprepared ground fails. The notes point you at the aggregate base calculation.

How this asphalt calculator works

Area times compacted depth gives cubic feet, divided by 27 for cubic yards, multiplied by density for tons. Around 2 tons per cubic yard is standard for compacted hot-mix asphalt.

The compaction distinction is where estimates go wrong. Loose mix is laid roughly a quarter deeper than its finished thickness — a 2 inch finished surface is spread at about 2.5 inches and rolled down. Ordering to the loose depth over-orders by a quarter.

The surface course is only part of the assembly. Beneath it belongs a compacted aggregate base, typically 4 to 8 inches depending on soil and expected load, which is a separate calculation and often the larger cost.

How to use it

  1. Step 1: Measure the area

    Length and width of the surface. Break irregular drives into rectangles.

  2. Step 2: Set the compacted depth

    Two inches for a residential drive surface course, three or more for heavier traffic.

  3. Step 3: Calculate the base separately

    Use the gravel calculator for the aggregate base underneath at its own depth.

  4. Step 4: Book a crew

    Hot mix must be laid and rolled while hot. In practice that means a crew and a roller on the delivery day.

Example usage

A 50 by 12 driveway
600 square feet at 2 inches compacted is 100 cubic feet, 3.7 cubic yards, or about 7.4 tons of hot mix.
The same drive with a base course
Add 4 inches of compacted aggregate beneath and that is another 200 cubic feet, 7.4 cubic yards, roughly 11 tons of crusher run. The base outweighs the asphalt.
A heavier-duty apron
Raising the surface to 3 inches on the same 600 square feet takes the asphalt from 7.4 to 11.1 tons — worth it where vehicles turn or park regularly.

Frequently asked questions

How many tons of asphalt do I need?

Area in square feet times compacted depth in feet, divided by 27, times about 2 tons per cubic yard. A 600 square foot drive at 2 inches works out at roughly 7.4 tons.

How thick should an asphalt driveway be?

Two inches of compacted surface course is typical for residential use over a proper aggregate base. Three inches or more where heavier vehicles turn or park regularly.

Is the depth loose or compacted?

Compacted — the finished thickness after rolling. Loose mix is spread about a quarter deeper than its final depth, so entering the loose figure would over-order by roughly 25 per cent.

Do I need a base under asphalt?

Yes. A compacted aggregate base of 4 to 8 inches depending on soil and load. Asphalt laid over soil alone will crack and rut in its first year or two.

Can I lay asphalt myself?

Realistically no, for hot mix. It has to be spread and compacted while hot, which means a crew and a roller working against the clock. Cold patch products exist for repairs but are not a driveway surface.

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