Tools & calculators

Free interactive calculators for planning power usage, storage, and RAID arrays.

Power consumption calculator

Estimate the yearly energy use and running cost of your home server.

See usable capacity, redundancy, and fault tolerance for common RAID levels.

Plan how much raw storage you need for your media, backups, and documents.

Work out the network address, broadcast, usable host range and host count for any IPv4 subnet.

Estimate how long a transfer takes and how much data a continuous stream uses.

Turn an availability target (e.g. 99.9%) into the downtime it allows.