Free tools
Cloud, network, and time calculators
Useful answers without a signup. Compare costs, plan infrastructure, or solve a quick everyday calculation.
Cloud cost planning
Use your own numbers where prices vary. Estimates are starting points; confirm a provider's current quote before buying.
Network diagnostics
Plan an IPv4 subnet or check the public address and approximate location your connection presents online.
Time and schedules
Calculate an overnight shift, a maintenance window, or elapsed time between two dates in your local time zone.
How these tools handle your data
Most calculations run in your browser. The IP location lookup contacts a third-party lookup service only after you click its button; its estimate is not a precise physical location. See the Privacy Policy for details.