Other calculators
Network math, password entropy, and a few novelty tools.
6 calculators
Acoustic Room Mode Resonance Calculator
Calculate a rectangular room-mode frequency from dimensions and axial, tangential, or oblique indices. Use the calculator above. Use the calculator above.
Bcrypt & Argon2 Hashing Cost Estimator
Compare relative bcrypt and Argon2 password-hashing work factors and estimate bcrypt latency scaling. Use the calculator above. Use the calculator above.
Dog Age in Human Years Calculator
Estimate a dog’s approximate human-equivalent age using a logarithmic model with examples and breed-aware limitations. Use the calculator above.
Password Entropy Calculator
Estimate theoretical password entropy bits from password length and character-set size, with examples and security limitations. Use the calculator above.
RAID Storage Capacity Calculator
Estimate usable capacity and tolerated drive failures for RAID 0, 1, 5, 6, and 10. Use the calculator above. Use the calculator above.
Subnet Mask / CIDR Calculator
Calculate IPv4 address counts, usable host counts, and a CIDR mask integer from a prefix length for network planning. Use the calculator above.