Coverage Area Formula:
Definition: This calculator estimates the area that can be covered by a bag of stone based on the bag weight, stone density, and desired depth.
Purpose: It helps landscaping professionals and DIYers determine how much area a standard 20kg bag of stone will cover for projects like pathways or decorative ground cover.
The calculator uses the formula:
Where:
Explanation: The formula calculates the volume of stone in the bag, then determines how much area that volume can cover at the specified depth.
Details: Accurate coverage estimation ensures proper material purchasing, prevents project delays, and helps with budget planning.
Tips: Enter the bag weight in kg (default 20), stone density (default 1600 kg/cu yd), and desired depth in inches (default 2). All values must be > 0.
Q1: Why is density important in this calculation?
A: Different stone types have different densities, which affects how much volume a given weight will occupy.
Q2: What's a typical stone density?
A: Most decorative stones range from 1400-1800 kg per cubic yard, with 1600 kg/cu yd being a common average.
Q3: How does depth affect coverage?
A: Coverage area is inversely proportional to depth - doubling the depth halves the coverage area.
Q4: Can I use this for other bag sizes?
A: Yes, simply change the weight value to match your bag size while keeping other parameters accurate.
Q5: Does this include compaction or waste?
A: No, consider adding 10-15% to the calculated amount for compaction and project contingencies.