Gravel Conversion Calculator: Tons to Yards & More

This gravel conversion calculator converts between cubic yards, cubic feet, and tons (short tons) for gravel. You enter the volume in cubic yards or cubic feet, or the weight in tons, and the calculator gives you the equivalent values in the other units, using a density you can adjust. The default density is 1.4 tons per cubic yard, a typical value for dry gravel.

Formula

The core relationship is: Weight (tons) = Volume (cubic yards) × Density (tons per cubic yard).

If you start with cubic feet, first convert to cubic yards by dividing by 27 (since 1 yard = 3 feet, so 1 cubic yard = 3³ = 27 cubic feet). The calculator uses these variables:

• Volume (yd³) – the space the gravel occupies, in cubic yards.
• Density (tons/yd³) – how heavy each cubic yard is, in short tons (2000 lb).
• Weight (tons) – the mass of gravel, in short tons.
• Volume (ft³) – the same space expressed in cubic feet.

Worked Example

Using the default values: volume = 3 yd³, density = 1.4 tons/yd³.

1. Weight = 3 × 1.4 = 4.2 tons.
2. Volume in cubic feet = 3 × 27 = 81 ft³.

The calculator shows 4.20 tons and 81.0 ft³, matching the example.

Why Density Matters

Gravel is not a single material. The density depends on the rock type, particle size, and moisture. Common values range from about 1.3 to 1.7 tons per cubic yard. For example, crushed stone with fines (like road base) is denser than clean, round pea gravel. If you know the specific gravity or the supplier’s density, enter it. Otherwise, 1.4 tons/yd³ is a reasonable average for dry gravel. Wet gravel can be 10–20% heavier, so if your gravel is damp, increase the density accordingly.

How to Use the Calculator for Real Projects

Here’s a typical workflow for a driveway or garden bed:

• Measure the area (length × width) in feet.
• Decide the depth in inches (e.g., 4 inches for a driveway).
• Convert depth to feet (4 in ÷ 12 = 0.333 ft).
• Volume (ft³) = length × width × depth.
• Divide by 27 to get cubic yards.
• Enter that number in the calculator (or use the ft³ output after entering yards).

For a 10 ft × 20 ft area at 4 inches deep: 10 × 20 × 0.333 = 66.6 ft³, which is 2.47 yd³. At 1.4 tons/yd³, that’s about 3.45 tons.

Common Mistakes and How to Avoid Them

• Mixing units: Always convert inches to feet or yards before calculating. A depth of 6 inches is 0.5 feet, not 6 feet.
• Ignoring compaction: Some gravel compacts (e.g., crushed stone base) and you may need extra material. Add 5–10% to the volume for compaction and settling.
• Using the wrong density: Lightweight volcanic gravel can be 1.0 tons/yd³, while dense limestone can be 1.6 tons/yd³. Check with your supplier.
• Rounding too early: If you round 2.47 yd³ to 2.5, that’s fine, but rounding to 2 loses 0.47 yd³, which is nearly 0.7 tons.

How to Choose the Right Gravel and Estimate Coverage

Different projects need different gravel. For a driveway, use crushed stone with fines (like crusher run) because it compacts into a solid surface. For drainage behind a retaining wall, use clean, angular gravel (like #57 stone) that allows water to flow. For a decorative path, pea gravel is comfortable underfoot but shifts easily.

Coverage depends on depth. One cubic yard covers 108 sq ft at 3 inches deep, 81 sq ft at 4 inches, and 54 sq ft at 6 inches. Use these numbers to plan your order.

Cost Considerations and Ordering

Gravel is typically sold by the cubic yard or by the ton. Prices vary widely by region and type, but you can estimate cost by multiplying the total tons by the price per ton. Delivery charges often apply, and some suppliers have a minimum order (e.g., 1 ton). If you’re ordering in bulk, ask for the exact density the supplier uses so your conversion is accurate.

Safety and Handling Tips

• Wear a dust mask when handling dry gravel, as silica dust can be harmful if inhaled repeatedly.
• Use gloves and safety glasses when shoveling or spreading gravel.
• Bend at the knees when lifting heavy buckets or bags to avoid back strain.
• Keep gravel piles away from drainage paths if you don’t want them to wash away.

Frequently Asked Questions

How many cubic yards are in a ton of gravel?

Divide 1 ton by the density. With the default 1.4 tons/yd³, 1 ton = 1 ÷ 1.4 ≈ 0.714 yd³. So about ¾ cubic yard per ton. If your gravel is denser (1.6), you get 0.625 yd³ per ton.

What is the difference between a short ton and a metric ton?

A short ton (US ton) is 2000 pounds, while a metric ton (tonne) is 1000 kilograms (about 2204 pounds). This calculator uses short tons. If your supplier quotes metric tons, multiply by 1.10231 to get short tons.

How much gravel do I need for a 10×10 area?

For a 10×10 ft area at 4 inches deep: volume = 10×10×(4/12) = 33.3 ft³ = 1.23 yd³. At 1.4 tons/yd³, that’s 1.72 tons. So about 1.7 tons.

Can I use this calculator for other materials like sand or soil?

Yes, if you change the density. Sand is typically 1.2–1.4 tons/yd³, topsoil is about 1.0–1.1 tons/yd³, and crushed concrete is similar to gravel. The math is the same.

Why does my supplier sell by the ton but the project plan says cubic yards?

Because weight is easier to measure on a truck scale, but volume is easier to estimate from dimensions. Use this calculator to convert between the two so you order the right amount.

What if my gravel is wet?

Wet gravel can weigh 10–20% more per cubic yard. Increase the density by 0.1–0.3 tons/yd³ to account for moisture. For example, use 1.6 instead of 1.4.

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in volume_yards | Volume (cubic yards) | yd³ | 3 | 0
in density | Gravel density | tons/yd³ | 1.4 | 0
out weight_tons | Weight (tons) | tons | volume_yards * density | 2
out volume_feet | Volume (cubic feet) | ft³ | volume_yards * 27 | 1