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LANDSCAPING

Gravel Calculator.

Estimate gravel volume, approximate weight and material cost for a driveway, path or base layer. Advanced mode turns the result into a supplier-ready order using load increments, minimum order and delivery charge.

Set material prices in EUR, USD, GBP, or ZAR. The choice formats the same entered price; it does not convert it with exchange rates.

IMPERIAL + METRIC · LIVE CALCULATION
GRAVEL CALCULATOR — CALCULATE
Calculator mode
Calculated result: 2.28 tons
YOUR RESULT2.28 tons

1.63 yd³ of gravel at the supplied bulk density.

BASE BREAKDOWN
Order volume1.63 yd³
Estimated weight2.28 tons
Material estimate$125.48
Calculated in your browser
HOW IT WORKS

Formula and calculation method.

Adjusted volume = length × width × depth × (1 + allowance). Weight = volume × density.

Dimensions establish compacted volume; density converts volume to weight. Supplier-specific density is more accurate than a generic gravel value. Advanced ordering rounds weight upward to the entered supplier increment and treats delivery separately.

WORKED EXAMPLES

See the material estimate in context.

Driveway layer

20 ft × 10 ft × 3 in, 1.4 tons/yd³, 10% allowance

Result: About 2.04 yd³ and 2.85 tons.

If a supplier sells in 0.5-ton increments, Advanced mode rounds the material order to 3.0 tons.

Metric path

6 m × 2 m × 0.075 m, 1680 kg/m³, 10% allowance

Result: About 0.99 m³ and 1.66 tonnes.

Run base and decorative layers separately when their densities differ.

USE IT CAREFULLY

Assumptions and common mistakes.

Assumptions

  • Depth represents the intended finished layer.
  • Bulk density matches the material reasonably well.

Mistakes to avoid

  • Using loose depth when the design specifies compacted depth.
  • Using one density for different aggregate layers.
  • Forgetting delivery or minimum-load charges.
EDGE CASES

Handle unusual projects explicitly.

Multiple layers

Calculate sub-base, base and decorative stone separately.

Sloped ground

Use an average depth or divide the project into sections.

LIMITATIONS

What the estimate leaves out.

Weight varies with grading, moisture and quarry material. This is not a geotechnical or structural base design.

FAQ

Material planning questions.

Why does gravel density matter?

The same volume can have different weights depending on stone type, grading and moisture.

Can delivery be included?

Yes. Advanced mode can show supplier-rounded material cost and a separate delivery charge.

PRACTICAL GUIDE

Gravel Calculator guide

Gravel is commonly quoted by cubic yard, cubic metre, ton, or tonne, so an estimate must keep volume and weight distinct. This calculator first finds the rectangular volume at finished depth, increases it for waste and settlement, then uses the supplied bulk density to estimate weight and an optional price to estimate material cost. It gives a clear bridge between a landscape measurement and the unit a quarry or landscape yard may sell.

Measure the covered length and width, then enter the compacted finished depth specified for the layer. Base rock, bedding aggregate, and decorative stone should be estimated separately because their depths, densities, and prices can differ. Use the supplier’s density whenever possible: stone size, gradation, moisture, and compaction make a generic density only an approximation. Delivery charges, minimum loads, and installation are outside the modeled material cost.

FORMULA AND VARIABLES

How the calculation works.

FormulaAdjusted volume = length × width × depth × (1 + waste ÷ 100). Weight = volume × bulk density; cost = tonnes × price.
  • length × width × depth = rectangular volume
  • waste = waste and settlement percentage
  • bulk density = tons per cubic yard or kilograms per cubic metre
  • price = cost per ton or tonne
WORKED EXAMPLE

Follow the numbers in context.

20 ft by 10 ft path at 3 inches

Convert 3 inches to 0.25 ft. The base volume is 20 × 10 × 0.25 ÷ 27, or about 1.85 yd³. With 10% waste and settlement, adjusted volume is about 2.04 yd³. At 1.4 tons per yd³, estimated weight is about 2.85 tons. A $55-per-ton material price produces an estimate near $157 before delivery and tax.

Metric driveway layer

A 6 m by 3 m area at 75 mm finished depth has 1.35 m³ before allowance. At 8% it becomes 1.458 m³. Using supplier density of 1,680 kg/m³ yields about 2,449 kg, or 2.45 tonnes. At 55 per tonne, the modeled material cost is about 135 in the entered currency denomination.

WHAT THE RESULT TELLS YOU

Use the number for the question this tool answers.

Read adjusted volume as the space to fill and weight as the density-based ordering cross-check.

When volume and weight produce different supplier recommendations, confirm the supplier’s own density and sales unit rather than averaging them.

The cost is a transparent material estimate only; add delivery, taxes, and installation separately.

Retain the quoted density beside the result, because changing it changes weight and cost without changing physical volume.

More detail: inputs, assumptions, mistakes and edge cases
HOW TO USE IT

Build a dependable estimate.

  1. Split the project into rectangles and calculate every layer with its own depth and material specification.
  2. Enter length, width, and compacted finished depth rather than a loose depth guessed from a pile.
  3. Use current supplier density and price in the unit the supplier quotes.
  4. Apply waste and settlement once through the provided percentage, then compare both adjusted volume and weight with ordering increments.
  5. Ask the supplier about delivery capacity, minimum quantities, moisture basis, and whether the material is sold loose or compacted.
UNITS AND INPUTS

Keep measurements compatible.

Imperial dimensions use feet for length and width and inches for depth; results include cubic yards and tons when imperial inputs and density are selected.

Metric dimensions use metres and centimetres, with density in kilograms per cubic metre and weight in tonnes.

A cubic yard measures space and a ton measures mass. They cannot be converted without a material-specific bulk density.

Price follows the selected weight unit, so do not apply a per-ton quote to a tonne result without converting or selecting the matching unit.

ASSUMPTIONS AND LIMITATIONS

Know what the result includes.

Assumptions

  • The placed area is rectangular with a uniform finished depth.
  • The entered density represents the same material and condition being ordered.
  • Waste and settlement apply as a percentage increase to base volume.
  • The optional price is a material-only rate per modeled ton or tonne.

Limitations

  • It does not model tapered grades, crown, drainage swales, excavation, geotextile, edging, compaction equipment, or delivery fees.
  • Loose and compacted volumes can differ, and quarry density can change with moisture and gradation.
  • The calculation is not a specification for pavement base thickness or a substitute for drainage and geotechnical design.
COMMON MISTAKES

Avoid preventable errors.

  • Entering loose pile depth when the project calls for compacted depth can underorder material.
  • Assuming every gravel product weighs 1.4 tons per cubic yard ignores product and moisture variation.
  • Confusing cubic yards with square yards omits depth entirely.
  • Multiplying price by volume when the quoted price is per ton or tonne produces the wrong cost basis.
EDGE CASES

Check unusual inputs carefully.

A circular drive, tapered trench, or irregular bed should be divided into appropriate geometric areas before depth is applied.

If the supplier sells only whole half-yard or full-ton increments, round according to that increment after reviewing access and storage.

A zero price can still yield a valid volume and weight estimate, but it does not represent a free delivered project.

Very shallow decorative layers may be strongly affected by existing grade variation and raking losses.

FAQ

Questions about this calculation.

Why does gravel have both volume and weight?

Volume describes the space to fill; density converts that space to the weight many suppliers load and sell.

Should I use compacted depth?

Yes. Start with the required finished compacted depth and use the allowance for settlement or placement losses.

Does the cost include delivery?

No. The formula multiplies modeled tonnes by entered material price only.

Can one density be used for all stone?

No. Use the quarry or supplier figure for the exact aggregate, moisture condition, and sales basis.

How do I handle multiple layers?

Calculate base, bedding, and topstone separately because each can have a different depth, density, and price.

RELATED TOOLS AND GUIDES

Continue the calculation.

Cubic Yard CalculatorConvert rectangular dimensions to bulk volume.Mulch CalculatorEstimate landscape bed material.Construction materials estimatingMeasure and order bulk materials.
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