20mm Gravel Calculator UK

20mm Gravel Volume Formula:

\[ V = \frac{L \times W \times D}{27} \]

Gravel Volume (cu yd):

1. What is a 20mm Gravel Calculator UK?

Definition: This calculator estimates the volume of 20mm gravel needed based on the area dimensions in feet and depth in inches.

Purpose: It helps homeowners and landscapers determine how much 20mm gravel is required for driveways, paths, and other projects in the UK.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V = \frac{L \times W \times D}{27} \]

Where:

\( V \) — Volume of gravel (cubic yards)
\( L \) — Length (feet)
\( W \) — Width (feet)
\( D \) — Depth (feet, converted from inches)
27 — Cubic feet per cubic yard conversion factor

Explanation: The length, width, and depth are multiplied to get cubic feet, then divided by 27 to convert to cubic yards.

3. Importance of 20mm Gravel Calculation

Details: Proper gravel volume estimation ensures you purchase the right amount, avoiding costly over-ordering or project delays from under-ordering.

4. Using the Calculator

Tips: Enter the length and width in feet, and depth in inches. All values must be > 0. For best results, measure your area accurately.

5. Frequently Asked Questions (FAQ)

Q1: Why 20mm gravel specifically?
A: 20mm gravel is a standard size in the UK, ideal for drainage and decorative purposes while being stable underfoot.

Q2: What's the typical depth for gravel projects?
A: For driveways, use 50-75mm (2-3 inches). For footpaths, 25-50mm (1-2 inches) is usually sufficient.

Q3: How do I convert cubic yards to tonnes?
A: Multiply by 1.4 (typical density for 20mm gravel). 1 cu yd ≈ 1.4 tonnes.

Q4: Should I add extra for compaction?
A: Yes, consider adding 10-15% to your calculated volume to account for compaction.

Q5: Can I use meters instead of feet?
A: This calculator uses feet. For meters, multiply length × width × depth (in meters) to get cubic meters directly.

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