Mulch Calculator - Free Online Calculator

Mulching is the single most cost-effective gardening practice you can adopt in Indian conditions. A 2-3 inch layer of mulch on flower beds, vegetable patches, lawn edges, terrace gardens, and around tree bases reduces irrigation water needs by 40-60%, suppresses weed germination, keeps soil temperature stable through harsh Indian summers, and slowly enriches soil as it decomposes. For urban Indian gardeners on terraces and balconies, mulch makes the difference between thriving plants in May-June heat and a dead garden. For farmers, mulching cuts manual weeding labour and locks in monsoon moisture for the dry months.

This calculator converts your garden bed area and target depth into volume - in cubic feet, cubic yards (the US trade unit), and the number of standard 2 cu ft or 3 cu ft retail bags. For Indian users, common mulch options include cocopeat/coir (excellent moisture retention, widely available in Indian nurseries), shredded coconut husk, dried sugarcane bagasse, wood bark, leaf litter, paddy straw (very common in North India), and commercial wood chip mulch. Each type lasts 6-18 months depending on decomposition rate. The calculation is the same regardless of mulch type - only the bag size and pricing differ.

Volume = area × depth, with units consistent. If area is in square feet and you want volume in cubic feet, convert depth from inches to feet first (depth_inches / 12). So for a 100 sq ft bed at 3 inch depth: volume = 100 × (3/12) = 25 cu ft. For metric users in India: area in sq m × depth in m = volume in cu m. 100 sq ft ≈ 9.29 sq m; 3 inches ≈ 0.0762 m; so 9.29 × 0.0762 = 0.71 cu m.

Bag count: divide total volume by bag size. A 2 cu ft bag (most common retail size, costs around ₹250-400 for cocopeat in India) covers 12 sq ft at 2 inch depth or 8 sq ft at 3 inch depth. A 3 cu ft bag covers proportionally more. For bulk delivery (truckload mulch for landscaping projects), volume is typically quoted in cubic yards (1 cu yd = 27 cu ft, enough for about 100 sq ft at 3 inch depth).

Depth selection by use case: 2 inches for annual flower beds and seasonal vegetables (allows new growth to push through). 3 inches for perennials, shrubs, and rose beds (good weed suppression). 4 inches under mature trees (long-term moisture retention). Never exceed 4 inches against plant stems - too thick suffocates roots and invites fungus, especially in Indian humidity. Keep a 2-inch gap around tree trunks to prevent bark rot.