You're asking about the relationship between flow rate (cfm), pressure (psi), and volume. Here's why a direct conversion like that isn't possible:

Understanding the Concepts:

* CFM (Cubic Feet per Minute): Measures the volume of air moving through a system per minute.

* PSI (Pounds per Square Inch): Measures the force exerted by the air.

The Problem:

You can't directly convert CFM at one pressure to CFM at another pressure without additional information. The flow rate depends on both pressure and the characteristics of the system (like pipe size, restrictions, etc.).

Think of it like this:

Imagine a hose with water flowing through it. If you increase the pressure at the source, the water will flow faster (higher CFM). But if you reduce the pressure by half, the flow rate won't necessarily be halved. It could be more or less, depending on the hose's size and any obstructions.

What you need to know:

To figure out the CFM at 45 psi, you'd need more details about the system. Here are some factors to consider:

* Type of system: Is it a compressor, a pump, a fan, etc.?

* System characteristics: What are the pipe sizes, any restrictions, or other factors affecting flow?

Let me know if you can provide more context, and I can help you calculate the CFM at 45 psi!