1. What is #57 Stone?

#57 stone is a specific size of crushed stone (approximately 1/2" to 1" in diameter) commonly used for drainage, driveways, and concrete mixes. It's named for its size specification in the ASTM C33 standard.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• Length — Project area length in feet
• Width — Project area width in feet
• Depth — Desired stone depth in inches
• Density — Weight per cubic yard (typically 1.4-1.7 tons/cu yd for #57 stone)
• 27 — Conversion factor (cubic feet to cubic yards)
• 12 — Conversion factor (inches to feet)

3. Importance of Accurate Calculation

Details: Proper calculation ensures you order the right amount of stone - too little means multiple deliveries, too much wastes money and storage space. #57 stone is typically sold by the ton.

4. Using the Calculator

Tips: Measure your project area carefully. For irregular areas, break into rectangles. Typical depth for driveways is 4-6 inches, for drainage projects 6-12 inches. Default density of 1.5 tons/cu yd works for most #57 stone.

5. Frequently Asked Questions (FAQ)

Q1: What's the coverage per ton of #57 stone?
A: Approximately 80-100 sq ft at 2" depth, or 40-50 sq ft at 4" depth, depending on compaction.

Q2: How does compaction affect calculations?
A: Stone compacts about 10-15% when installed. For precise work, add 10% to your calculated amount.

Q3: Can I use this for other stone sizes?
A: The formula works for any aggregate, but density varies by material. #57 stone typically weighs 1.4-1.7 tons/cu yd.

Q4: Should I order extra stone?
A: It's wise to order 5-10% extra to account for settling, waste, and measurement inaccuracies.

Q5: How do I measure irregular areas?
A: Break into rectangular sections, calculate each separately, then sum the totals.