Question 1

How to calculate gravel?

Accepted Answer

To calculate gravel: Multiply Length (ft) by Width (ft) to get square footage. Multiply square footage by Depth in feet (depth in inches divided by 12) to get cubic feet, then divide by 27 to find Cubic Yards. Shortcut: (Length × Width × Depth in inches) ÷ 324 = Cubic Yards. Multiply cubic yards by 1.4 to 1.5 to get US Tons, and add 10% for compaction and subgrade settlement.

Question 2

How much will 1 ton of gravel cover?

Accepted Answer

One US ton of gravel covers approximately 100 to 110 square feet at 2 inches depth, 70 to 75 square feet at 3 inches depth, 50 to 55 square feet at 4 inches depth, and 35 to 40 square feet at 6 inches depth.

Question 3

How much gravel per m² calculator?

Accepted Answer

In metric units, at a standard 50mm (2 inch) depth, you need 0.05 m³ or approximately 80 to 90 kg (0.08 to 0.09 tonnes) of gravel per square meter (about 4 to 5 standard 20kg bags). At 75mm (3 inches), you need 0.075 m³ or 125 to 135 kg per m².

Question 4

How to calculate 57 gravel?

Accepted Answer

Number 57 gravel (#57 stone) is clean, angular 3/4-inch crushed stone with a bulk density of 1.40 to 1.45 tons per cubic yard. To calculate: Cubic Yards = (Length ft × Width ft × Depth in) ÷ 324. Then multiply Cubic Yards by 1.43 tons/yd³ and add 10% for compaction to get total tons of #57 stone.

Question 5

How is gravel size measured?

Accepted Answer

Gravel size is measured and graded by passing quarried stone through standardized ASTM/AASHTO wire-mesh sieves. Common gradations include Pea Gravel (1/8" to 3/8"), #57 Crushed Stone (1/2" to 1" angular stone), Crusher Run (3/4" down to rock dust), #3 Ballast (1.5" to 2.5"), and Riprap (4" to 12"+).

Question 6

How much area will a 20kg bag of gravel cover?

Accepted Answer

A 20kg bag of gravel covers approximately 0.25 square meters (2.7 sq ft) at 50mm (2 inches) depth, 0.32 square meters (3.4 sq ft) at 40mm (1.5 inches) depth, and 0.50 square meters (5.4 sq ft) at 25mm (1 inch) depth. You need approximately 4 bags per square meter at 50mm depth.

Question 7

Is 2 inches of gravel enough?

Accepted Answer

Two inches of gravel is sufficient for pedestrian walkways, garden paths, flower beds, and decorative ground cover. However, 2 inches is not enough for driveways, parking pads, or shed bases; vehicle driveways require 6 to 8 inches of total aggregate depth (4-6" compacted subbase + 2-3" surface layer) to prevent rutting.

Question 8

How big is a 5-ton load of gravel?

Accepted Answer

A 5-ton load of gravel equals approximately 3.4 to 3.6 cubic yards (92 to 97 cubic feet). When dumped, it forms a conical pile about 8 to 10 feet wide and 3.5 to 4.5 feet high. A 5-ton load covers approximately 550 sq ft at 2 inches depth, 370 sq ft at 3 inches depth, or 275 sq ft at 4 inches depth.

Question 9

How much gravel do I need calculator?

Accepted Answer

To find how much gravel you need, measure your project length and width in feet, determine the required depth in inches, and use our interactive calculator to compute exact cubic yards, US tons, retail bags, and estimated project cost with compaction allowance.

Question 10

How much pea gravel do I need calculator?

Accepted Answer

For pea gravel, which has a density of 1.40 tons per cubic yard, use the formula: Tons = (Length ft × Width ft × Depth in ÷ 324) × 1.40 × 1.10. For a 12x16 ft patio (192 sq ft) at 3 inches depth, you need 1.78 cubic yards or 2.74 US tons of pea gravel.

Question 11

How much gravel for fish tank calculator?

Accepted Answer

For a fish tank, use 1 to 1.5 pounds of aquarium gravel per gallon of tank volume (aiming for 1.5 to 2.5 inches of substrate depth). Formula: Pounds of Gravel = [Tank Length (in) × Tank Width (in) × Desired Depth (in)] ÷ 17.5. A 20-gallon tank requires ~25-30 lbs of gravel, and a 55-gallon tank requires ~60-70 lbs.

Question 12

How much gravel for driveway calculator?

Accepted Answer

A gravel driveway requires 6 to 8 inches of total depth structured in two layers: 4 to 6 inches of compacted Crusher Run subbase topped with 2 to 3 inches of #57 crushed stone. A standard 2-car driveway (20x40 ft = 800 sq ft) at 6 inches depth requires approximately 14.8 cubic yards or 25.5 US tons of total aggregate.

Question 13

How many yards of gravel do I need calculator?

Accepted Answer

To calculate cubic yards of gravel, multiply your square footage by your desired depth in inches, then divide by 324. Formula: (Length in ft × Width in ft × Depth in inches) ÷ 324 = Cubic Yards. Add 10% for compaction.

Question 14

How many bags of gravel do I need calculator?

Accepted Answer

Standard retail gravel bags contain 0.5 cubic feet (~50 lbs). Since 1 cubic yard equals 27 cubic feet, you need 54 bags (0.5 cu ft) per cubic yard. One 0.5 cu ft bag covers 3.0 sq ft at 2 inches depth or 2.0 sq ft at 3 inches depth.

Question 15

How much crushed gravel calculator?

Accepted Answer

Crushed gravel weighs approximately 1.40 to 1.50 tons per cubic yard loose, and up to 1.60 tons/yd³ when compacted. To calculate: multiply cubic yards [(Length × Width × Depth in inches) ÷ 324] by 1.45 tons/yd³ and add 10% for compaction.

Question 16

How many tons of pea gravel do I need calculator?

Accepted Answer

Pea gravel has a bulk density of 1.40 US tons (2,800 lbs) per cubic yard. To calculate tonnage: Tons = [(Length ft × Width ft × Depth in) ÷ 324] × 1.40 × 1.10. For 100 sq ft at 2 inches depth, you need 0.95 tons (34 bags); for 500 sq ft at 3 inches depth, you need 7.13 tons.

Question 17

How much sand and gravel for concrete calculator?

Accepted Answer

Standard concrete uses the 1:2:3 mix ratio (1 part Portland cement, 2 parts concrete sand, 3 parts #57 gravel). To make 1 cubic yard of concrete, you need 6 bags of Portland cement (564 lbs), 0.52 cubic yards (~1,400 lbs) of sand, and 0.78 cubic yards (~2,100 lbs) of gravel. If using 80-lb pre-mix bags, you need 45 bags per cubic yard.

Question 18

How much gravel do I need for my patio calculator?

Accepted Answer

A long-lasting gravel patio requires 4 to 5 inches of total depth in two layers: 3 inches of compacted Crusher Run subbase topped with 1.5 to 2 inches of pea gravel or decomposed granite. A 15x20 ft patio (300 sq ft) requires ~4.3 tons of Crusher Run base and ~2.1 tons of pea gravel surface coat.

Question 19

What size gravel bike do I need calculator?

Accepted Answer

Gravel bike frame sizes are determined by rider height: Extra Small (47-50cm) for 4'10"-5'2", Small (51-53cm) for 5'3"-5'6", Medium (54-56cm) for 5'7"-5'10", Large (56-58cm) for 5'11"-6'2", and Extra Large (59-62cm) for 6'3"+. If between sizes, size down for trail agility or size up for high-speed stability and bikepacking.

Gravel Calculation & Aggregate FAQ Hub

Top 19 Questions & Detailed Answers