For the detail of the calculation, you can refer to the official documentation:

1. CPU Calculation:  (CPU) System configuration — Odoo 17.0 documentation
2. Memory Calculation: (MEMORY) System configuration — Odoo 17.0 documentation
3. Configuration Example :   (EXAMPLE) System configuration — Odoo 17.0 documentation

Hi,

Here's what I'd recommend based on real-world experience:

  Minimum that actually works:

  - 4GB RAM (not 2GB like some guides suggest)

  - 2 vCPUs

  - 40GB SSD storage

  - This should handle your modules comfortably

  Sweet spot for smooth performance:

  - 8GB RAM

  - 4 vCPUs

  - 80GB SSD storage

  I learned this the hard way after starting with a 2GB server that       

  became unusable once we had 3 people using it simultaneously. POS       

  especially can be resource-hungry during busy periods.

  Cost-wise, you're looking at around $40-80/month depending on

  provider. I put together a detailed comparison of providers and

  exact specs in my self-hosting guide

  https://ariashaw.github.io/odoo-self-hosting-guide/ - includes performance       

  benchmarks and real monthly costs.