Tools for people who build and tinker
Free tools for homelab, self-hosting, and 3D printing
Free, no-nonsense calculators and guides for homelab, self-hosting, and 3D printing. No signup to use the tools, no tracking beyond anonymous page counts.
Homelab & self-hosting
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.
Dedicated storage calculators: RAIDZ, Synology SHR, and unRAID.
- 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.
3D printing
3D Print Cost Calculator Enter filament, print time, and your rates to get the true per-print cost: material, power, machine wear, and failed prints. Filament Drying Calculator Pick your filament and your dryer, get the manufacturers' drying temperature and time, and a straight answer on whether your dryer can reach it.
- PLA vs PETG: which should you use? Strength, heat, ease of printing, and when to pick each.
- How much does it cost to 3D print? Filament, power, machine wear, failed prints, and your time.