Tonnage
Calculate tonnage of construction aggregates from dimensions and density. Free material weight calculator with breakdown charts for gravel, sand, or stone.
About This Calculator
Our Tonnage Calculator helps contractors, landscapers, and DIY homeowners estimate the weight of construction aggregates needed for any project. Whether you are laying a gravel driveway, ordering sand for masonry work, filling a trench with crushed stone, or planning a crushed limestone base, knowing the exact tonnage prevents over-ordering and ensures you have enough material for the job. The calculator supports both short tons (US) and metric tonnes (India, UK, and global).
The calculation uses the formula: Weight (tons) = (Length × Width × Depth in feet) × Material Density (lb/ft³) ÷ 2,000. First, your length and width in feet are multiplied to get the area in square feet. The depth in inches is converted to feet (divide by 12) and multiplied by the area to get the volume in cubic feet. The volume is then multiplied by the selected material's density (in pounds per cubic foot) to get the weight in pounds. Finally, the weight is divided by 2,000 to convert to short tons. A metric tonne equivalent is also provided (multiply pounds by 0.000453592). You can add a wastage percentage (typically 5–10%) to account for compaction, spillage, and uneven surfaces. If you enter a price per ton, the calculator also estimates the total material cost.
Regional Notes
India: Construction aggregates are typically sold by the metric tonne (1,000 kg) or in cubic feet. Common materials include crushed stone (gitti), river sand, and gravel. Prices vary by city and season. The Bureau of Indian Standards (BIS) specifies aggregate grading for concrete (IS 383). Always order 5–10% extra for handling losses.
US: Aggregates are sold by the short ton (2,000 lb) or cubic yard. Common suppliers include Quikrete, Home Depot, and local landscape yards. A standard dump truck carries 10–15 tons. The US Army Corps of Engineers and ASTM standards govern aggregate quality for construction. Check local building codes for required base depths for driveways and patios.
UK: Aggregates are sold by the metric tonne. A standard bulk bag (often called a "jumbo bag" or "builder's bag") typically holds about 1 tonne of material. Common aggregates include MOT Type 1 (road base), sharp sand, ballast, and pea gravel. The British Standards (BS EN 12620) specify aggregate requirements for construction. VAT at 20% applies to aggregate purchases for most projects.
Frequently Asked Questions
What is tonnage in construction?
In construction, tonnage refers to the weight of materials such as gravel, sand, crushed stone, or soil measured in tons. It is calculated by multiplying the volume of material needed by its density (weight per unit volume). Tonnage is essential for ordering the right amount of aggregate, estimating transport costs, and planning foundation loads.
How do I calculate the tonnage of gravel needed?
To calculate gravel tonnage, multiply your area (length × width in feet) by the depth in feet to get cubic feet. Multiply cubic feet by the material's density in pounds per cubic foot (gravel is approximately 105 lb/ft³). Divide the result by 2,000 to convert pounds to short tons. For metric tonnes, multiply pounds by 0.000453592. Add 5–10% for wastage to ensure you order enough material.
How many cubic yards are in a ton of crushed stone?
A ton of crushed stone typically occupies about 0.82 cubic yards, since crushed stone has a density of approximately 100 lb/ft³ (2,700 lb/yd³). One short ton (2,000 lb) divided by 2,700 lb/yd³ equals roughly 0.74 cubic yards. The exact volume varies by stone type and compaction level. For crushed stone with 10% wastage, order about 0.9 cubic yards per ton needed.
What is the difference between a short ton and a metric tonne?
A short ton (used in the US) equals 2,000 pounds or 907.185 kilograms. A metric tonne (used in most other countries including India and the UK) equals 1,000 kilograms or 2,204.62 pounds. One short ton is about 0.907 metric tonnes, and one metric tonne is about 1.102 short tons. This calculator provides both values for your convenience.
What is the density of common construction aggregates?
Common aggregate densities in pounds per cubic foot: gravel (105 lb/ft³), crushed stone (100 lb/ft³), sand (100 lb/ft³), limestone (156 lb/ft³), granite (165 lb/ft³), concrete (150 lb/ft³), topsoil (69 lb/ft³), and marble (160 lb/ft³). In kilograms per cubic meter: gravel (1,680 kg/m³), crushed stone (1,602 kg/m³), sand (1,602 kg/m³), limestone (2,500 kg/m³), and granite (2,650 kg/m³).
How much area does one ton of gravel cover?
One ton of gravel covers approximately 100 square feet at 2 inches depth, 80 square feet at 3 inches depth, or 60 square feet at 4 inches depth. This varies based on gravel density and compaction. For a standard driveway base at 4 inches deep, one ton of gravel covers about 50–70 square feet. Always order 5–10% extra to account for compaction and uneven surfaces.
What is the formula for calculating material tonnage?
The formula for tonnage is: Weight (tons) = (Length × Width × Depth in feet) × Material Density (lb/ft³) ÷ 2,000. First calculate the volume in cubic feet: Volume = Length (ft) × Width (ft) × Depth (in) ÷ 12. Then multiply by the material's density to get weight in pounds. Finally divide by 2,000 for short tons. For metric tonnes, divide pounds by 2,204.62 or use the conversion factor 0.000453592.