The calculation of injection mold prices usually involves the following factors:

1. Product design: The price of injection mold is related to product design, because the complexity and shape of the mold will affect the manufacturing difficulty and cost of the mold.

2. Material selection: The material selection of the injection mold will also affect the price. Usually, high-quality steel materials will make the mold more durable, but it will also increase the cost.

3. Mold size: The larger the size of the injection mold, the higher the manufacturing difficulty and cost.

4. Production quantity: The price of injection molds is also related to the production quantity. Usually, the larger the number of production, the lower the cost of a single mold.

5. Manufacturing process: The manufacturing process of injection mold will also affect the price. For example, the use of advanced CNC machining technology to manufacture molds will be more expensive than traditional hand-made molds.

To sum up, the calculation of injection mold prices needs to consider a number of factors. If you need to calculate the price of injection molds, it is recommended to contact a professional mold manufacturer to provide detailed product design and production requirements so that they can provide you with an accurate quote.