Homelab
Homelab and self-hosting tools and guides
Everything here is for people running their own gear at home: storage arrays, always-on servers, and the power and backup behind them. The calculators do the math you actually need before you buy or build, and the guides explain the storage and cost decisions in plain terms. Free, no signup.
Tools
RAID / ZFS / unRAID Storage Calculator Usable capacity, fault tolerance, and cost per TB across RAID 0/1/5/6/10, RAIDZ1/2/3, and unRAID. Homelab Power & Electricity Cost Calculator Add your always-on devices, set your kWh rate, and see daily, monthly, and yearly electricity cost with a per-device breakdown. UPS Runtime & Sizing Calculator Estimate how long your UPS will run your gear, or work out what size UPS and battery you need for a target runtime. Subnet / CIDR Calculator Enter a network like 192.168.1.0/24 to get the mask, wildcard, network and broadcast, usable host range, host count, and split it into smaller subnets.
Guides
- ZFS RAIDZ explained RAIDZ1 vs 2 vs 3, parity overhead, and which to pick.
- RAID vs unRAID How the two storage models differ, and when each fits.
- RAID rebuild risk and UREs Why single parity gets dangerous on large modern drives.
- How much does it cost to run a homelab? The power math, typical device wattages, and a worked yearly example.