Circularity Index Calculator
Free Circularity index Calculator for waste recycling. Enter variables to compute results with formulas and detailed steps.
Formula
MCI = 1 - LFI x F(X) where LFI = (V + W) / (2M + W/2)
Material Circularity Index measures how restorative material flows are, from 0 (fully linear) to 1 (fully circular).
Worked Examples
Example 1: Recycled Packaging
Problem: 100 kg, 30% recycled input, 50% recovery, utility 1.0.
Solution: V = 100 x 0.7 = 70 kg. W = 100 x 0.5 = 50 kg. LFI = 120/225 = 0.533. MCI = 1 - 0.533 x 0.9 = 0.52
Result: MCI = 0.52 (Moderate)
Example 2: Durable Product
Problem: 50 kg, 60% recycled, 80% recovery, utility 1.5.
Solution: V = 50 x 0.4 = 20. W = 50 x 0.2 = 10. LFI = 30/105 = 0.286 MCI = 1 - 0.286 x 0.6 = 0.828
Result: MCI = 0.83 (Excellent)
Frequently Asked Questions
What is the Material Circularity Index?
The MCI is a metric developed by the Ellen MacArthur Foundation to measure how circular a product or company material flows are. It ranges from 0 (completely linear take-make-dispose) to 1 (perfectly circular with full material recovery). The index considers both the recycled content of inputs and the recyclability of outputs at end of life.
What does the linear flow index represent?
The linear flow index quantifies the proportion of material flowing through a product system in a linear fashion from extraction to disposal. It combines virgin material input and unrecovered waste relative to total material throughput. Lower LFI values indicate more circular material flows with greater recycling and recovery rates.
How does recycled input fraction affect circularity?
Higher recycled input reduces virgin material demand proportionally, directly improving the circularity score. Using 50 percent recycled content halves the virgin material component of the linear flow calculation. Increasing recycled content is often the most practical way to improve circularity for manufactured products.
How does waste recovery improve the index?
Waste recovery fraction measures how much end-of-life material is recycled, composted, or otherwise returned to productive use. A recovery rate of 100 percent means no material goes to landfill or incineration without energy recovery. Even partial recovery significantly improves circularity compared to fully disposing of products after use.
What industries use circularity metrics?
Electronics manufacturers track circularity to measure recycled content and e-waste recovery performance across product lines. Fashion brands calculate garment circularity considering recycled fibers and textile-to-textile recycling rates. Construction companies measure circularity of building materials including recycled aggregate and steel content.
How can companies improve their circularity index?
Design for disassembly and recycling ensures materials can be recovered efficiently at end of product life. Increasing recycled content in raw materials directly reduces virgin resource dependence and improves MCI scores. Extending product life through durability, repair services, and refurbishment programs improves the utility factor.