// tools / vps
VPS size calculator
Tell it what you run and how much traffic you get. It estimates the vCPU, RAM and disk your server needs, shows how it got there, and points to the smallest plan that fits. Nothing leaves your browser.
What your project needs
Estimated peak load: -
Where the RAM goes
How the estimate is built
Monthly visits are turned into page views (2.5 per visit), then into an average rate per second. That average is multiplied by 4 for steady traffic or 12 for spiky traffic to get the peak the server must absorb.
CPU comes from the peak rate times the CPU time a typical uncached request takes on that stack, doubled to leave room for bots, admin pages, cron and updates. A page cache cuts PHP stacks to roughly a third of that.
RAM adds the operating system, one process set per app, a shared database whose buffer grows with traffic, the workers needed at peak, your extras, and a 30 % margin. Disk adds the system, each app, your media, and 50 % for logs, updates and local backups.
Assumptions per stack
| Stack | App RAM (GB) | Database RAM (GB) | CPU per uncached request |
|---|---|---|---|
| Static site (Nginx / Caddy) | 0.05 | - | 2 ms |
| WordPress | 0.25 | 0.75 | 80 ms |
| WooCommerce shop | 0.4 | 1 | 150 ms |
| Laravel / PHP app | 0.3 | 0.75 | 60 ms |
| Node.js app | 0.3 | 0.5 | 20 ms |
| Docker containers | 0.6 | 0.75 | 50 ms |
These are rules of thumb, not benchmarks. A heavy plugin set, a large catalogue or slow queries can double them. If you already run the site, the real numbers from htop and your database are better than any calculator.
Questions
How much RAM does a WordPress VPS need?
A single WordPress site with a few tens of thousands of visits a month runs in about 2 to 3 GB once MySQL and PHP-FPM are counted. Several sites or WooCommerce push it to 4 GB and more.
Is 1 vCPU enough?
For a static site, yes. For anything with PHP or a database, 2 vCPU is the comfortable minimum, because updates, backups and bots run at the same time as your visitors.
Should I size for today or for growth?
For today plus a margin. Most VPS providers let you move up a plan later, so paying for capacity you may need in a year rarely makes sense.