IT & Cybersecurity Calculators
Password security, networking, storage, and IT operations calculators.
Cybersecurity
Password resistance time, password strength, SIEM log volume, and security awareness tools.
Password Generator
Generate a cryptographically secure random password with your chosen length and character set. See entropy in bits and strength rating — then understand why length matters more than complexity for resistance to brute-force attacks.
Password Strength by Time
Enter password length, character set, and attacker speed to see the estimated average brute-force crack time. Adjust the attack speed to compare online rate-limited logins versus offline hash-cracking scenarios. For educational use — to illustrate why length and randomness are your primary defences.
Password Strength Checker
Enter password length and character types to see the estimated entropy in bits, strength rating, and actionable improvement steps. Runs entirely client-side — no input is transmitted or stored. Adjust the strong-entropy target to match your security policy.
SIEM Log Volume Estimator
Enter your events per second, average event size, retention period, and indexing overhead to get daily ingest in GB and total retention storage in TB. Adjust the overhead multiplier for your SIEM vendor's observed compression ratio. Use the result as a planning baseline — validate against a sample week of actual data before purchasing long-term storage.
Networking & Storage
Subnet calculator, internet usage, file size, and storage conversion tools.
Bandwidth Calculator
Enter file size and transfer speed to see how long a download or upload takes. The calculator handles the bits-vs-bytes conversion automatically, so your ISP's Mbps and your browser's MB/s stay comparable.
Base64 Encode / Decode
Encode text into Base64 or decode Base64 back to text, with the distinction between transport encoding and real security kept clear.
Electricity Cost Calculator
Turn appliance wattage, daily hours, and your electricity rate into daily, monthly, and annual running-cost estimates.
File Size Storage Calculator
Enter file size and number of files to get total storage required in your chosen unit. Choose between decimal (GB) and binary (GiB) standards — the same reason your 1 TB drive appears as 931 GB in Windows. Also converts any file size between all common units.
Internet Usage Calculator
Estimate monthly data use from the selected activity, daily hours, and days per month, then see how strongly that habit can affect a capped plan.
Ohm's Law Calculator
Enter two different known values to calculate the remaining electrical values and see when a zero denominator makes a result undefined.
Resistor Color Code Calculator
Choose the four color bands to read the resistor value, tolerance, and the actual range allowed by that tolerance.
Subnet Calculator
Enter an IPv4 address and CIDR prefix to get the network address, broadcast address, subnet mask, and usable host count. Change the prefix to see how splitting a /24 into /25s or /26s reduces host capacity and enables network segmentation.
URL Encode / Decode
Encode or decode URL components so spaces and reserved characters travel safely, while keeping percent-encoding separate from security controls.
Voltage Drop Calculator
Calculate voltage drop and percentage from Current (amps), Wire length, Wire gauge, with the key formulas and caveats needed to interpret the result correctly.
