What are the minimum requirements to run a Minecraft server?

For a small vanilla or Paper server with 2–5 friends: 2 GB RAM, 1 CPU core at 2.8+ GHz, 10 GB NVMe storage, 5 Mbps upload, Java 21, and port 25565 open. Most plugin-based SMP servers with 10–20 players need at least 4 GB RAM, 2–3 CPU cores, 40 GB NVMe, and 10 Mbps upload. Requirements scale with player count, plugin count, world size, and view distance.

How much CPU does a Minecraft server need?

Minecraft server tick processing is mostly single-threaded — one fast core matters more than many slow cores. For 10–20 players on Paper, aim for 2–3 cores at 3.0+ GHz with high IPC (Ryzen 5000/7000, Intel 12th/13th gen). Heavy redstone, mob farms, or 50+ players benefit from 4+ cores. Avoid oversubscribed budget VPS hosts that throttle CPU — TPS drops below 20 long before RAM runs out.

How much storage does a Minecraft server need?

Plan for: world folder (500 MB–40 GB depending on explored area), plugin/mod files (1–10 GB), daily backups (3× world size for 3 days retention), logs and crash reports (1–2 GB), and Dynmap tiles (0.5× world size if used). A typical SMP with daily backups needs 40–80 GB NVMe. Never use HDD — chunk loading is random I/O and HDDs cause stutter during exploration.

How much upload bandwidth does a Minecraft server need?

Each connected player uses roughly 80–150 Kbps upload depending on activity (exploring new chunks uses more than standing still). Ten active players need ~10 Mbps upload minimum. Twenty players need 15–20 Mbps. Add headroom for backup uploads and map rendering. Home connections often have asymmetric upload — check your actual upload speed before self-hosting.

What Java version do I need for a Minecraft server in 2025?

Minecraft Java Edition 1.20.5 and later requires Java 21. Paper, Purpur, and Spigot for 1.21.x all run on Java 21 LTS (Eclipse Temurin recommended). Older modpacks on Forge 1.16–1.19 may need Java 17 or Java 8 — always check the modpack page. Bedrock Dedicated Server does not use Java.

Can I host a Minecraft server on my home PC?

Yes, for small groups. You need: the PC running 24/7 (or accept downtime), port 25565 forwarded on your router, a static or dynamic DNS name, sufficient upload bandwidth (check speedtest.net upload, not download), and RAM/CPU not already consumed by other apps. Downsides: home IP exposure, power cost, ISP upload caps, and no DDoS protection. VPS hosting from $5–15/month avoids most of these issues.

VPS or dedicated server for Minecraft?

VPS is right for most servers up to ~50 players on a single backend. Choose a host with dedicated vCPU (not shared/oversubscribed) and NVMe storage. Dedicated servers make sense for 50+ concurrent players, multi-backend networks, or heavy modpacks needing 32 GB+ RAM. Avoid "unlimited RAM" shared game panels — they oversell and throttle.

Do I need a MySQL database for my Minecraft server?

Not always. Small servers can use YAML/SQLite storage built into plugins like LuckPerms and LiteBans. MySQL or MariaDB becomes important at scale (30+ players, networks) or when using plugins that require it (some economy, logging, and web integration plugins). Plan 2 GB extra disk and 384 MB RAM if running MySQL on the same VPS.

What ports need to be open for a Minecraft server?

Java Edition default: TCP 25565. Bedrock Edition: UDP 19132. If using Velocity proxy: TCP 25577 (Velocity default). BungeeCord: TCP 25565 on the proxy. Backend servers behind a proxy can use non-standard ports since players connect to the proxy IP only. Also open SSH (22) for VPS management — restrict it to your IP via firewall.

How do server requirements differ for modded vs plugin servers?

Plugin servers (Paper/Spigot) scale mainly with player count and plugin count — RAM and single-thread CPU speed dominate. Modded servers (Forge/Fabric) add heavy JVM Metaspace usage, longer startup times, and more CPU during worldgen. A 200-mod Forge pack with 8 players often needs more RAM (10–16 GB) and storage (15–30 GB) than a 30-player Paper SMP with 25 plugins (6–8 GB RAM).

Tools · Hosting

Minecraft Server Requirements Calculator

Ordering a VPS or planning a home server? This calculator estimates RAM, CPU cores, NVMe storage, upload bandwidth, Java version, OS, and open ports from your player count, plugin load, world size, backup strategy, and network setup — then gives you a copyable spec sheet to paste into a hosting order.

RAM · CPU · Storage · Bandwidth · Java · OS · PortsPresets for SMP, Skyblock, modpacks & networks

Quick presets

Server profile

Server software

Network setup

Max online players — 20

150100200

Plugin load

World size on disk

Entity / redstone load

Backup frequency

Dynmap / BlueMap web mapMySQL database (LuckPerms, etc.)Voice chat plugin

RAM

8 GB

6 GB min · 8 GB comfortable

CPU

2 cores

3.0+ GHz, 2–3 cores with high IPC

Storage

40 GB

20 GB minimum · NVMe/SSD

Upload bandwidth

5 Mbps

10 Mbps download recommended

Recommended hosting tier

Performance VPS

8–16 GB RAM, 4 vCPU, 80 GB NVMe — busy SMP or small minigame server

Need a deeper RAM breakdown and JVM flags? Use our RAM Calculator.

System & software requirements

Java runtime

Java 21 LTS (Temurin or Oracle)

Operating system

Linux — Ubuntu 22.04/24.04 LTS or Debian 12 (headless, no desktop)

Network ports

25565 (Java) or 19132 (Bedrock)

Disk type

NVMe SSD strongly recommended — avoid HDD for chunk I/O

Requirements checklist

!8 GB RAM allocated to JVM (-Xmx)
!2 CPU cores at 3.0+ GHz
!40 GB SSD/NVMe storage
!5 Mbps upload bandwidth minimum
!Java 21 LTS (Temurin or Oracle)
·Linux — Ubuntu 22.04/24.04 LTS or Debian 12 (headless, no desktop)
!Port 25565 (Java) or 19132 (Bedrock) open (TCP)
·Firewall (UFW/iptables) configured
!daily world backups (3× world size)
·Automatic restart on crash (systemd / panel)

Full spec summary (copy for hosting order)

Minecraft Server Requirements Summary
─────────────────────────────────
RAM:      8 GB recommended (6 GB min, 8 GB comfortable)
CPU:      2 cores — 3.0+ GHz, 2–3 cores with high IPC
Storage:  40 GB NVMe/SSD (20 GB minimum)
Upload:   5 Mbps minimum
Download: 10 Mbps minimum
Java:     Java 21 LTS (Temurin or Oracle)
OS:       Linux — Ubuntu 22.04/24.04 LTS or Debian 12 (headless, no desktop)
Ports:    25565 (Java) or 19132 (Bedrock)
Hosting:  Performance VPS — 8–16 GB RAM, 4 vCPU, 80 GB NVMe — busy SMP or small minigame server
Players:  20 max | Software: paper | Plugins: moderate

Every component your server needs

Hosting panels advertise "4 GB RAM Minecraft Server" as if RAM is the only spec that matters. In practice, five other resources determine whether players experience smooth 20 TPS or constant lag.

RAM — heap for chunks, entities, and plugins

RAM holds loaded chunks, every entity in the world, plugin caches, and the JVM itself. Under-allocating causes OutOfMemoryError crashes; over-allocating on a shared VPS starves the OS. For JVM tuning and Aikar flags, use the dedicated RAM Calculator.

CPU — single-thread speed wins

The main game tick runs on one thread. A 5 GHz single core outperforms a 2 GHz 16-core Xeon for Minecraft. That said, garbage collection, async chunk loading (Paper), Dynmap rendering, and MySQL queries use additional cores — so 2–4 fast cores is the sweet spot for most SMP servers. Watch TPS (/tps on Paper) — if TPS drops below 18 with RAM to spare, you are CPU-bound.

Storage — NVMe is non-negotiable

Minecraft reads and writes chunks in random 4 KB blocks constantly. HDDs deliver 1–2 ms seek times that cause visible stutter when players explore. NVMe SSDs at 50–100 µs latency eliminate this. Budget for world data + plugin files + backup retention — a server with a 5 GB world and daily backups needs at least 20 GB free, not 10 GB.

Bandwidth — upload, not download

ISPs advertise download speed. Minecraft servers are upload-bound — every block change, entity movement, and inventory click sends data from server to client. A 100 Mbps download / 10 Mbps upload home connection supports roughly 10–15 active players before rubber-banding starts. VPS hosts typically offer symmetric or high-upload plans — verify before buying.

Requirements by player count (Paper SMP, moderate plugins)

Players	RAM	CPU	Storage	Upload
1–5	2–3 GB	1–2 cores @ 2.8+ GHz	20 GB NVMe	5 Mbps
10–15	4–6 GB	2–3 cores @ 3.0+ GHz	40 GB NVMe	10 Mbps
20–30	6–8 GB	3–4 cores @ 3.0+ GHz	60 GB NVMe	15 Mbps
40–60	10–16 GB	4 cores @ 3.2+ GHz	100 GB NVMe	25 Mbps
80–100	16–32 GB	6+ dedicated cores	160 GB NVMe	40 Mbps

Home server vs VPS — which is right for you?

Home PC / old laptop

Free if hardware already owned
Full control, no monthly fee
Exposes home IP — use with caution
Upload speed often the bottleneck
No DDoS protection
Power cost + noise + uptime depends on you

Best for: 2–8 friends, LAN-like trust groups

VPS / game server host

$5–40/month depending on specs
Static IP, DDoS protection (most hosts)
Symmetric bandwidth, 24/7 uptime
Panel for backups, restarts, console
Watch for oversubscribed CPU on cheap plans
Less control than bare metal

Best for: public SMP, 10+ players, 24/7 uptime

First-time server setup checklist

Install Java 21 (Temurin) or verify modpack Java version
Download Paper, Purpur, or your chosen server jar
Accept EULA (eula=true in eula.txt)
Configure server.properties — set view-distance, motd, max-players
Allocate RAM with -Xms and -Xmx flags
Open port 25565 (TCP) on firewall and router if self-hosting
Set up daily backups (plugin, panel, or rsync cron)
Install essential plugins: permissions, anti-grief, core commands
Pre-generate world with Chunky to avoid lag on first join
List on a server list to attract players — MinecraftServer.Buzz

Frequently asked questions

What specs do I need for a 20-player SMP?

6 GB RAM, 3 CPU cores at 3.0+ GHz, 60 GB NVMe, 15 Mbps upload, Java 21, Ubuntu 22.04, port 25565 open. Paper with 15–25 plugins, view distance 10, daily backups.

Is 4 GB enough to start a server?

Yes, for 5–10 players with a lean plugin set and view distance 8. Upgrade to 6–8 GB before advertising publicly — player spikes during peak hours will exhaust 4 GB fast.

Do I need a dedicated IP?

No. Players connect via IP address or domain name — a shared IP with a custom port works fine. A dedicated IP (default port 25565) looks cleaner in server lists. Most VPS hosts include one IPv4 address; domains cost ~$10/year via Cloudflare, Namecheap, etc.

What is the difference between this and the RAM Calculator?

This tool covers the full hosting picture — CPU, storage, bandwidth, Java, OS, and ports. The RAM Calculator goes deeper on memory breakdown, JVM flags, and Aikar G1GC tuning. Use both together.

Can I run multiple servers on one VPS?

Yes — allocate separate RAM pools per server (-Xmx for each), use different ports, and ensure total RAM + 1.5 GB OS headroom fits within the VPS. A 16 GB VPS can run two 6 GB backend servers plus a 1 GB Velocity proxy comfortably.