THE TOOLBOX / 07 TOOLS

Make the numbers
make sense.

Practical calculators with visible assumptions. Use the result to inform a plan, then verify it against your actual environment.

Compare RAID and ZFS layouts.
Understand what your disks can hold.

Turn a CIDR prefix into an address plan.
Every boundary, clearly defined.

Plan a download, upload or backup window. Calculate time or work backwards to the speed you need.

Understand a 128-bit prefix. Normalize addresses, find the range and preview smaller networks.

Turn an IPv4 range into exact CIDR blocks, or get the complete range behind a prefix.

Give each VLAN enough room. Allocate named networks by host count and check that the plan fits.

See what always-on devices and everyday appliances cost to run, using your own electricity tariff.

Calculations run in your browser. No account, external API, or submission of your calculator inputs is required.