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Gravel Driveway Calculator

Calculate gravel driveway specifications, roofing bundles, and driveway material needs with ease.

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Roofing / Driveway Inputs

Enter length, width, or pitch parameters.

Calculated Quantity / Tonnage

10.0 Squares 30 Shingle Bundles
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Roofer's Tip

There are 3 3-tab asphalt shingle bundles in 1 roofing square (100 sq ft of roof area).

Roofing & Paving Engineering Formulas

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Formulas

Roofing Squares = (Flat Area × Pitch Multiplier) / 100

Applies standard pitch geometry multipliers and asphalt pavement compaction ratios.

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Important Safety & Material Disclaimer

Add 10% waste for hip/valley cuts and check steep roof slope fall protection requirements.

How to Calculate Roofing & Driveway Materials Step-by-Step

Follow these simple steps for precise contractor ordering:

1

Measure Base Footprint Area

Measure flat ground dimensions of the house footprint or driveway path.

2

Determine Roof Pitch or Asphalt Thickness

Specify roof pitch slope (e.g. 6/12) or asphalt layer thickness in inches.

3

View Shingle Bundles or Asphalt Tons

Instantly view calculated roofing squares, shingle bundle counts, or asphalt tons.

Detailed Insights & FAQ

ℹ️ About this Calculation

Accounting for pitch slopes and material densities ensures accurate contractor bidding and delivery scheduling.

Variable Glossary

Input

Footprint / Pitch

Ground area and roof slope rise/run ratio.

Output

Squares / Bundles

Roofing squares (100 sq ft) and shingle bundles.

Frequently Asked Questions

How many bundles of shingles are in a square?
Standard 3-tab asphalt shingles require 3 bundles per roofing square (100 sq ft). Heavier architectural shingles may require 3 to 4 bundles per square.
How thick should an asphalt driveway be?
A residential asphalt driveway typically requires 2 to 3 inches of compacted hot-mix asphalt over a 6 to 8-inch crushed stone aggregate base.