How deep should gravel be for a path or a driveway?

Enter the depth you have been given for your layer; this page calculates quantity and does not choose a depth, build-up or material. The editable path example is 20 feet by 10 feet at 2 inches: 1.23 cubic yards and 1.42 tonnes at 1.5 t per cubic metre. The driveway example is 30 feet by 10 feet at 4 inches: 3.70 cubic yards and 4.25 tonnes. Its separate metric example is 9 metres by 3 at 10 cm: 3.53 cubic yards and 4.05 tonnes. These are example dimensions, not recommendations or conversions of one another. Base design, drainage, compaction and load-bearing suitability are outside this calculator.

How much does a cubic yard of gravel weigh?

A cubic yard is exactly 0.764554857984 cubic metres. Multiply that by your supplied density in tonnes per cubic metre. At the editable 1.5 example, it is 1.146832286976 metric tonnes, displayed as 1.15; at 1.7 it is 1.2997432585728, displayed as 1.30. These supplied-density calculations do not establish a density for a named grade or material.

How much area does a ton of gravel cover?

Coverage requires a supplied mass, density and depth. This page accepts dimensions or a known area and calculates the mass for that layer; it has no inverse mass-to-area input. At a supplied density of 1.5 t/m³, one metric tonne spread at a supplied 2-inch depth would cover about 141 square feet. A US short ton is exactly 907.18474 kg and gives a different coverage. No layer depth or material density is recommended here.

Should I order gravel by weight or by volume?

Use the measurement and density supplied for your material. This page shows both the geometric volume and the mass calculated from that density. It does not select an ordering unit, supplier, delivery quantity or compaction allowance. A rate per tonne is a different basis from a rate per cubic yard; the optional price field accepts your own rate per metric tonne only.

How many bags of gravel make a ton?

Twenty-five 40 kg bags make one metric tonne. Forty 50 lb bags make one US short ton, because a US short ton is exactly 2,000 lb. For a measured layer, this page rounds each bag count up from the full calculated mass before rounding displayed weight. A circle uses a bound for π; if that bound straddles a bag boundary, the page shows a count range. Larger abbreviated counts remain complete in the selectable calculation.

Where does the density come from, and can I change it?

The buttons load editable examples: gravel 1.5, pea gravel 1.7 and crushed stone 1.6 tonnes per cubic metre. They are not measurements, recommendations, grade-specific values or a claim that one material is always heavier than another. Enter your supplied density. Moisture, grading and compaction can change a measured bulk density, and this calculator does not determine those properties.

Is anything uploaded, and does it cost anything?

The arithmetic runs in your browser with no account. Valid deliberate changes can be saved in this browser; opening the page or restoring a record does not rewrite it. Invalid or incomplete drafts and unusable latest records are preserved until you deliberately forget saved settings. The rate is never saved. The calculator has no supplier, installed or regional price list, delivery quote or payment.

Gravel Calculator

Type an area, a rectangle or a circle, and the depth of stone you are laying, in feet and inches or in metres and centimetres, and read the volume in cubic yards, cubic metres and cubic feet at once. Enter your supplied depth and density to see cubic yards, cubic metres, cubic feet, metric tonnes, US short tons and whole 40 kg or 50 lb bags. The material buttons load editable density examples of 1.5, 1.7 and 1.6 tonnes per cubic metre; they do not identify your grade or measure its density. Known area accepts a square-foot or square-metre measurement. Unit switches retain exact values as decimals or fractions. Rectangle and known-area arithmetic is exact; circle decimals approximate π, and all displayed decimals are rounded. The optional price multiplies your own rate per metric tonne and is never saved.

20 ft by 10 ft at 2 in1.42 t1.23 cu yd · 0.94 m³ · 33.33 cu ft1.56 US tons at 1.5 t/m³ · 36 bags of 40 kg or 63 of 50 lb

Supply the depth and your density. The material buttons and job chips load editable examples. Unit changes preserve the measurements as exact decimals or fractions. Decimal results round to two places; ≈ marks a circle approximation, and … marks an abbreviation. Complete values are below.

Your rate per tonneOptional. The rate is never saved; only your own supplied rate is multiplied.

Complete selectable calculation

Gravel Calculator - supplied single-layer quantity estimate
Geometry: rectangle; 20 ft by 10 ft at 2 in
Material button: gravel; supplied density 1.5 t/m³
cubicMetres: exact 0.9438948864 m³ (18435447/19531250)
cubicFeet: exact 100/3 ft³ (100/3)
cubicYards: exact 100/81 yd³ (100/81)
Metric tonnes: exact 1.4158423296 t (55306341/39062500)
US short tons: exact 1769802912/1133980925 US short tons (1769802912/1133980925)
Whole 40 kg bags: 36
Whole 50 lb bags: 63
No supplied price total.
Depth and density are supplied inputs. The material buttons set editable examples; they do not identify your material, certify a grade or choose a layer depth.
Rectangle and supplied-area arithmetic and unit factors are exact. Circle volume is π times the stated coefficient; decimal displays use a 100-place bound for π and are approximate.
Mass follows the supplied density. Bags round up from the full mass before display rounding; a range means the π bound straddles a bag boundary. Larger abbreviated quantities have complete values below.
This is a single-layer quantity estimate. No compaction, excavation, base design, drainage, installation, suitability, delivery or regional price is inferred.

A small border12 ft by 3 ft at 2 in
0.22 cu yd, 0.25 t
A driveway30 ft by 10 ft at 4 in
3.70 cu yd, 4.25 t
A circular bed8 ft across at 3 in
≈ 0.47 cu yd, ≈ 0.53 t

Supplied volume, density and price kept visible. Depth and density are supplied inputs. The material buttons set editable examples; they do not identify your material, certify a grade or choose a layer depth. Rectangle and supplied-area arithmetic and unit factors are exact. Circle volume is π times the stated coefficient; decimal displays use a 100-place bound for π and are approximate. Mass follows the supplied density. Bags round up from the full mass before display rounding; a range means the π bound straddles a bag boundary. Larger abbreviated quantities have complete values below. This is a single-layer quantity estimate. No compaction, excavation, base design, drainage, installation, suitability, delivery or regional price is inferred.

Common questions

How deep should gravel be for a path or a driveway?: Enter the depth you have been given for your layer; this page calculates quantity and does not choose a depth, build-up or material. The editable path example is 20 feet by 10 feet at 2 inches: 1.23 cubic yards and 1.42 tonnes at 1.5 t per cubic metre. The driveway example is 30 feet by 10 feet at 4 inches: 3.70 cubic yards and 4.25 tonnes. Its separate metric example is 9 metres by 3 at 10 cm: 3.53 cubic yards and 4.05 tonnes. These are example dimensions, not recommendations or conversions of one another. Base design, drainage, compaction and load-bearing suitability are outside this calculator.
How much does a cubic yard of gravel weigh?: A cubic yard is exactly 0.764554857984 cubic metres. Multiply that by your supplied density in tonnes per cubic metre. At the editable 1.5 example, it is 1.146832286976 metric tonnes, displayed as 1.15; at 1.7 it is 1.2997432585728, displayed as 1.30. These supplied-density calculations do not establish a density for a named grade or material.
How much area does a ton of gravel cover?: Coverage requires a supplied mass, density and depth. This page accepts dimensions or a known area and calculates the mass for that layer; it has no inverse mass-to-area input. At a supplied density of 1.5 t/m³, one metric tonne spread at a supplied 2-inch depth would cover about 141 square feet. A US short ton is exactly 907.18474 kg and gives a different coverage. No layer depth or material density is recommended here.
Should I order gravel by weight or by volume?: Use the measurement and density supplied for your material. This page shows both the geometric volume and the mass calculated from that density. It does not select an ordering unit, supplier, delivery quantity or compaction allowance. A rate per tonne is a different basis from a rate per cubic yard; the optional price field accepts your own rate per metric tonne only.
How many bags of gravel make a ton?: Twenty-five 40 kg bags make one metric tonne. Forty 50 lb bags make one US short ton, because a US short ton is exactly 2,000 lb. For a measured layer, this page rounds each bag count up from the full calculated mass before rounding displayed weight. A circle uses a bound for π; if that bound straddles a bag boundary, the page shows a count range. Larger abbreviated counts remain complete in the selectable calculation.
Where does the density come from, and can I change it?: The buttons load editable examples: gravel 1.5, pea gravel 1.7 and crushed stone 1.6 tonnes per cubic metre. They are not measurements, recommendations, grade-specific values or a claim that one material is always heavier than another. Enter your supplied density. Moisture, grading and compaction can change a measured bulk density, and this calculator does not determine those properties.
Is anything uploaded, and does it cost anything?: The arithmetic runs in your browser with no account. Valid deliberate changes can be saved in this browser; opening the page or restoring a record does not rewrite it. Invalid or incomplete drafts and unusable latest records are preserved until you deliberately forget saved settings. The rate is never saved. The calculator has no supplier, installed or regional price list, delivery quote or payment.

Rectangle or supplied area times depth and unit conversions use exact arithmetic; circle decimals approximate π. Weight and bags follow a density you can change. No compaction or material choice is inferred.