Tools

All tools

Every calculator on the site, grouped by topic. Pick the one you need and go. Each is free, runs in your browser, and needs no signup.

Homelab

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.

3D printing

3D Print Cost & Pricing Calculator Enter filament, print time, and your rates to get the full cost breakdown, a suggested price, and your profit per print.