Rotational Molding Cost Calculator

Rotational molding is a versatile manufacturing process used for producing hollow plastic products. It involves heating a plastic material in a mold that rotates along two perpendicular axes. The molten material coats the interior of the mold, creating a seamless and durable product. Determining the cost of rotational molding can be complex due to various factors involved, including material costs, labor, tooling, and more. To simplify this process, we’ve created the Rotational Molding Cost Calculator.

Formula: The cost calculation involves multiple factors, including material cost, tooling cost, labor cost, electricity cost, overhead cost, transportation cost, miscellaneous cost, desired profit margin, and more. The calculator uses the following formula to determine the selling price:

Selling Price = (Production Cost + Total Cost) / (1 - Desired Profit Margin / 100)

How to Use:

  1. Enter the diameter and height of your rotational molding product.
  2. Input the material cost, quantity, tooling cost, labor cost, electricity cost, overhead cost, desired profit margin, transportation cost, and miscellaneous cost.
  3. Click the “Calculate” button to determine the selling price.

Example: Let’s say you are manufacturing a plastic container with a diameter of 24 inches and a height of 12 inches. The material cost is $200 per cubic inch, and you need to produce 100 units. Tooling costs amount to $1,000, labor is $500, electricity is $300, overhead is $700, and you desire a 20% profit margin. Transportation costs are $200, and miscellaneous costs are $100.

Input these values into the calculator and click “Calculate.” The calculator will provide you with the selling price for your product.


  1. What is rotational molding? Rotational molding, also known as rotomolding, is a plastic manufacturing process used to create hollow, seamless products.
  2. How does rotational molding work? It involves heating a mold that rotates along two axes, allowing the molten plastic to coat the interior and take the shape of the mold.
  3. What factors affect rotational molding costs? Material cost, labor, tooling, electricity, overhead, transport, and profit margin all impact the cost.
  4. Why is calculating rotational molding costs important? It helps manufacturers determine the selling price and profitability of their products.
  5. Can this calculator be used for other industries? While designed for rotational molding, it can be adapted for similar manufacturing processes.
  6. Is the desired profit margin a crucial input? Yes, it determines the level of profit you want to achieve in your pricing.
  7. What if I’m unsure about some cost inputs? Use your best estimates or consult with experts in your industry.
  8. Are there any limitations to this calculator? It provides a rough estimate and should be used as a starting point for pricing decisions.
  9. Can it handle multiple products with different parameters? The calculator is designed for a single product at a time.
  10. How accurate is the calculation? The accuracy depends on the accuracy of the input data. It provides a good estimate but should be verified with actual costs.

Conclusion: The Rotational Molding Cost Calculator is a valuable tool for manufacturers in the rotational molding industry. It simplifies the complex process of cost estimation, enabling businesses to make informed pricing decisions and improve profitability. Remember that while this calculator provides a useful estimate, it’s essential to validate the results with real-world data and market considerations for the most accurate pricing strategy.

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