Compost & Mulch Calculator Skip to page navigation How much compost or mulch do you need? Note though, that if you are using gravel, such as for walkways and driveways, it may come pre-mixed with water. As a soil amendment before planting new beds, use 1-3 inches of compost dug or tilled into the soil. Simply enter in the length and width of the area to be composted, the compost depth desired, and optionally enter in the compost bulk density. Cubic yards of compost required to cover a specific area: 2_____ ft x _____ inches of compost x 0.0031 = _____ yd3 Example: 2 43,560 ft x 1 inch of compost x 0.0031 = 135 yd3 per acre Calculating nutrient application rates from compost A) Volume method 1) Calculate cubic yards of compost applied per specific area (see above) Reproduction Rate - V&R (1987): Uses values from The life-cycle of the compost worm Eisenia fetida (Oligochaeta) (J.M.Venter and A.J.Reinecke). This was a study conducted across 600 days, where 10 original worms were used, and reproduction/growth was noted throughout. Ratio 2 is going to be additional items mixed in afterwards that have a C:N either high in nitrogen or high in carbon – whichever is opposite to Ratio 1. You can build excellent compost without using a calculator. Ideally, the estimated C:N ratio for composting is between 25:1 and 30:1 portions of carbon and nitrogen for a faster composting process. For optimal performance, the beneficial microbes need the right ratio of carbon for vitality and nitrogen for protein generation. The free online compost calculator makes it super easy to know exactly how much compost you need for your next composting project. Our soil calculator can be used to help you determine how much soil all of your containers will need. Use our calculator to formulate a plan for your project. This calculator computes one of the following three quantities, given the other two: volume of soil amendment (in cubic yards), area of coverage (in square feet), depth of amendment (in inches) To use this calculator, you must enter two of the three numbers. GMC Complete Compost should be added to your soil at a ratio of 1 part compost to a minimum of 2 parts native soil. Confused with how much a yard of compost is? Compost Mix Calculator Sources Bernalillo County Extension Master Composters. The addition of water adds more weight even though the square footage covered remains unchanged. So, you can either build a pile and hope for the best… or, you can use our compost calculator to help make sure your compost pile has good carbon to nitrogen ratios. Aerate your lawns, then apply 1/4 – 1/2 inch of compost and gently rake into existing soil. Compost Calculator; Unsure about how much compost you need? For lawns: Lawns can look great without chemicals. Whether you are growing in raised beds, 5 gallon buckets, or pots, our soil calculator has the flexibility to mix and match any combination of round and rectangular containers for you environment. Enter the mass of each material (wet weight), percentage of carbon, percentage of nitrogen, and percentage of moisture, then click on the calculate button. Well, according to the USDA, the ideal carbon to nitrogen rate for optimal microbial action in a compost pile is between 20:1 and 40:1, with 24:1 being the absolute sweet spot. Our compost calculator gives measurements in both cubic yards and tons based on average dry weights. Calculate C/N Ratio For Three Materials This calculation solves for the carbon to nitrogen ratio of up to three materials. (Use 3 inches to improve sandy soils, or 1-2 inches for heavy clay soils). Or just want to make sure you are not buying too much. For mulching, spread 1-3 inches of compost on beds in fall or spring. When adding materials to your compost, it is not necessary to use precise measurements or attain an exact C:N (carbon to nitrogen) ratio. Ratio 1 is going to represent all of the organic waste you have accumulated at your home or business that you want to compost such as food scraps, weeds, and used paper. The Compost Calculator Width (feet) Length (feet) Depth (inches) Reseed and water as usual. At a ratio of up to Three Materials as for walkways and driveways it. The carbon to nitrogen ratio of carbon for vitality and nitrogen for protein generation to improve soils. Super easy to know exactly how much a yard of compost is to... Used, and reproduction/growth was noted throughout free online compost calculator makes it super easy know. And nitrogen for protein generation of compost dug or tilled into the soil too much compost ratio calculator! & Mulch calculator Skip to page navigation how much compost you need come with... 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