IT & Cloud Calculators
Free, practical tools for IT, cloud, and networking work — plan an IPv4 subnet, gauge password strength, estimate file-transfer time, model a cloud bill, translate an SLA into a downtime budget, and convert between storage units.
Subnet Calculator
Enter an IPv4 address and CIDR prefix to get the network and broadcast addresses, subnet and wildcard masks, the usable host range, and total and usable host counts
Password Strength Calculator
Estimate a password's entropy and offline crack time from its length and character sets, with a weak-to-strong rating — all computed in your browser
Bandwidth Calculator
Estimate how long a file takes to transfer over a link from its size and speed, with the result in a readable format and the megabit maths behind it
Cloud Cost Calculator
Estimate your monthly and annual cloud bill from compute, storage, and egress, with each line item broken out so you can see where the spend lands
Uptime SLA Calculator
Turn an availability target like 99.9% into the maximum allowable downtime per day, week, month, and year — the budget behind every SLA tier
Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB, and PB using binary units, and see the exact byte count behind every result