Gravel Tons to Cubic Yards: How to Convert
The calculator for this page is switched off while it is checked. The formula is below, and the worked example in the article shows how to use it by hand.
To convert gravel from tons to cubic yards, divide the weight in tons by the gravel’s density in tons per cubic yard. Since gravel density typically ranges from 1.4 to 1.7 tons per cubic yard, you’ll need to know the specific type of gravel you’re using for an accurate conversion.
Formula
The basic formula is:
Cubic yards = Tons ÷ Density (tons per cubic yard)
Where:
- Tons = weight of gravel you have (short tons, 2,000 lb)
- Density = weight per unit volume of the specific gravel (tons per cubic yard)
If you have density in pounds per cubic foot, use: Cubic yards = (Tons × 2,000) ÷ (Density in lb/ft³ × 27)
Worked Example
Using the calculator defaults: 2 tons of crushed stone (density 1.6 tons/yd³).
- Start with the formula: Cubic yards = 2 ÷ 1.6
- Divide: 2 ÷ 1.6 = 1.25
- Result: 1.25 cubic yards
The calculator shows 1.25 yd³, matching the step-by-step calculation.
Why Density Varies by Gravel Type
Gravel is a catch-all term for loose rock fragments, but different types pack differently. Pea gravel (small, rounded stones) has more air gaps, so it weighs less per cubic yard. Crushed stone (angular fragments) settles more tightly, increasing density. Bank gravel (mixed with sand and clay) can be heaviest because fine particles fill the voids.
Typical densities in tons per cubic yard:
- Pea gravel: 1.4
- Crushed stone (1–2 inch): 1.6
- Bank gravel: 1.7
- Loose dry gravel: 1.4–1.5
- Wet gravel: up to 1.9
Moisture content matters too. Wet gravel can weigh 10–15% more than dry gravel, so if your pile has been rained on, the conversion shifts.
How to Use the Calculator
Enter the total weight of gravel you have in tons. Select the gravel type that matches your material – the calculator uses a typical density for each. The result is the volume in cubic yards that weight occupies.
If you don’t know the exact density, start with 1.6 tons/yd³ for crushed stone, the most common construction gravel. For a more precise number, check the supplier’s spec sheet or weigh a known volume yourself.
Common Mistakes and Misconceptions
The biggest error is assuming all gravel weighs the same. Using 1.4 when you have crushed stone can understate your volume by 12%, meaning you order too little and run short mid-project.
Another trap: mixing up short tons (2,000 lb) and metric tons (2,204 lb). The calculator uses short tons, which is standard for US gravel sales. If your weight is in metric tons, multiply by 1.1023 first.
Also, don’t confuse cubic yards with cubic feet. One cubic yard equals 27 cubic feet. When a supplier quotes a price per cubic yard, they mean a volume 3 feet × 3 feet × 3 feet.
Estimating Without a Scale
If you have a pile but no weight, you can work backwards. Measure the pile’s dimensions (length × width × height in feet), divide by 27 to get cubic yards, then multiply by the density to estimate tons. For a cone-shaped pile, use: Volume = (Ï€ × radius² × height) / 3.
For a rectangular area you plan to fill, calculate: Length (ft) × Width (ft) × Depth (ft) ÷ 27 = cubic yards. Then multiply by density to get tons. This is how most landscaping projects determine how much gravel to order.
Ordering Gravel: Volume vs. Weight
When buying gravel, you’ll see prices per ton or per cubic yard. If the price is per ton, you need to convert your required volume to weight. If it’s per cubic yard, you need volume. Always confirm which unit the supplier uses before ordering.
Delivery trucks have weight limits too. A typical dump truck holds 10–14 cubic yards, but that might exceed road weight limits depending on the gravel’s density. For large orders, the supplier will calculate both volume and weight to stay legal.
Frequently Asked Questions
How many cubic yards are in a ton of gravel?
At the average density of 1.6 tons/yd³, one ton of gravel equals 0.625 cubic yards (1 ÷ 1.6). For pea gravel at 1.4 tons/yd³, it’s 0.714 yd³; for bank gravel at 1.7, it’s 0.588 yd³.
What is the density of gravel in pounds per cubic foot?
Typical gravel density is 90–110 lb/ft³. Crushed stone often falls around 100 lb/ft³. Multiply by 27 to get pounds per cubic yard (about 2,700–2,970 lb), then divide by 2,000 to get tons per cubic yard.
How much area does a cubic yard of gravel cover?
At a 2-inch depth, one cubic yard covers about 162 square feet (27 ft³ ÷ 0.167 ft). At 4 inches deep, it covers 81 square feet. For a 10×10 foot area at 3 inches deep, you need 0.93 cubic yards, which is about 1.5 tons of crushed stone.
Can I convert tons to cubic yards for any material?
No. The conversion depends entirely on density. A ton of feathers takes up far more volume than a ton of gravel. The formula works for any bulk material, but you must use that material’s specific density.
Why does my supplier’s conversion differ from mine?
Suppliers often use a standard density for their region or specific product. They may also account for compaction – gravel settles about 10–15% after being dumped and spread. If you’re ordering for a project, add 10% extra to your calculated volume to cover compaction and spillage.
Does gravel density change when it’s wet?
Yes. Water fills the void spaces between stones, adding weight without changing volume. Wet gravel can be 10–15% heavier than dry. If your gravel has been exposed to rain, use a higher density estimate (up to 1.9 tons/yd³).
Related
Formula used
in t | Tons of gravel | tons | 2 | 0 sel d | Gravel density | Pea gravel=1.4, Crushed stone=1.6, Bank gravel=1.7 | 1.6 | 0 out yards | Cubic yards | yd³ | t / d | 2 out weight | Weight in pounds | lb | t * 2000 | 0
Each line is one input (in, sel, list) or one result (out: label, unit, formula, decimals). How the calculators work
Method: the standard formula for this calculation, rounded as each result states. See how the calculators work or report an error.