Weight & Conversion Calculators
Convert between weight, volume, and area for all stone types.
Stone Weight Calculator
Estimate the total weight of stone needed based on volume and material type.
Stone Tonnage Calculator
Calculate the total tonnage of stone required for purchasing.
Stone Slab Weight Calculator
Calculate the weight of individual stone slabs for transport and placement.
Kg to Stone Calculator
Convert weight from kilograms (kg) to the traditional stone (st) unit.
Pounds to Stone Calculator
Convert weight from pounds (lbs) to the traditional stone (st) unit.
Stone to Kg Calculator
Convert weight from the traditional stone (st) unit to kilograms (kg).
Stone to Pounds Conversion Calculator
Convert weight from the traditional stone (st) unit to pounds (lbs).
Kg to Lbs to Stone Calculator
A comprehensive tool to convert between kilograms, pounds, and stone.
Stone Pounds to Kilos Conversion
Convert weight from stone and pounds to kilograms (kg) instantly, with an accurate UK and Ireland conversion.
Cubic Yards to Tons Calculator
Convert cubic yards of gravel, stone, sand, or soil to tons (and back) using accurate material bulk densities.
Aggregate Cubic Meter Calculator
Convert aggregate between cubic metres and tonnes using metric bulk densities — ideal for UK, EU, and metric projects.
Chiller Tonnage Calculator
Size a chiller by cooling tons from water flow (GPM) and temperature difference, with BTU/hr and kW conversions.
The Importance of Weight Conversion in Material Planning
The Importance of Weight Conversion in Material Planning
When purchasing bulk materials like sand, gravel, or stone, suppliers often sell by weight (tons) rather than volume (cubic yards). Understanding the relationship between weight and volume is essential for accurate ordering. The key factor is bulk density, which can vary significantly between different materials and even change based on moisture content. Our weight conversion calculators simplify this process, allowing you to seamlessly switch between units.
Whether you're ordering a truckload of gravel calculated with our aggregate estimators or planning a large-scale project with our landscape construction tools, converting to the supplier's unit of sale ensures you get exactly what you paid for. This is particularly crucial for heavy materials used in structures like retaining walls, which you can plan using our wall and patio calculators.
Choosing the Right Tool for Your Job
Working across two unit systems is where most ordering mistakes creep in. These converters keep volume, weight, and your supplier's pricing aligned, so the numbers still add up when the truck arrives.
Why Density Changes the Answer
A cubic yard of sand and a cubic yard of lava rock weigh very different amounts, so every volume-to-weight conversion hinges on the specific material. To see how each stone type behaves before you convert, browse our Aggregate & Stone Estimators.
Converting Real Project Quantities
Most conversions start with a real job: a driveway, a garden bed, a drainage trench. Work out the volume first with our Landscape & Construction Calculators, then convert that figure into the tonnage your supplier quotes.
Weighing Heavy Structural Stone
Slabs, veneer, and wall stone are heavy enough that weight affects transport, support, and labour. For those builds, pair these converters with our Wall, Patio, & Specialty Calculators to plan both the quantity and the handling.
Frequently Asked Questions
Why do I need to convert cubic yards to tons?
Most sand and gravel suppliers sell their products by weight in tons. If you calculate your project's needs in cubic yards (volume), you will need to convert that measurement to tons (weight) to place an accurate order and ensure you receive the correct amount of material.
How much does a cubic yard of wet sand weigh compared to dry sand?
Water is heavy, so wet sand weighs significantly more than dry sand. A cubic yard of dry sand might weigh around 2,600 pounds, while the same volume of wet sand could weigh over 3,000 pounds. It's crucial to know the moisture condition when converting.
What is a typical density for common landscaping stones?
The density of landscaping stone varies, but a common rule of thumb is approximately 1.3 to 1.5 tons (2,600 to 3,000 pounds) per cubic yard. Granite is denser and heavier than lighter stones like sandstone or limestone.
Is it more accurate to order materials by weight or by volume?
Ordering by weight is generally more accurate and is the industry standard for suppliers, as volume can be affected by how loosely the material is packed. However, you will typically calculate your needs based on the volume required to fill a specific space.
How can I find the specific density of my material?
The best way to find the specific density is to ask your material supplier. They will have accurate data for the products they sell. Our calculators also provide common estimates for a wide range of materials.
Do these calculators account for material compaction?
Our conversion calculators provide the direct mathematical conversion between volume and weight. Compaction should be accounted for separately when you are first calculating the volume of material needed. You can use our aggregate estimators for that initial step.