All free tools
Server RAM calculator.
Estimate a starting allocation for your players and modpack.
Estimated starting allocation3 GB
Leave headroom and test your actual world. This is not a performance guarantee.
Explore matching plansHow the estimate works
This is a planning heuristic, not a benchmark: it starts with 2 GB for a small vanilla world, adds player headroom, and increases the baseline for mods. World generation, server software, view distance and mods all change real usage.
How should I choose a plan?
Use the estimate as a starting point. Test your actual world and leave memory headroom. A specific modpack’s published requirements should take priority over this general estimate.
Free to use. No account required. Inputs stay in your browser.