Developer & IT calculators
Networking, data formats, and test-data generators for software work.
Developer and IT calculators on pancalc cover subnets, encoding, image resize math, test data generation, and security parameters. Each page documents the relationship so you can audit outputs in code reviews or runbooks.
Use them when planning network layouts, estimating storage, or teaching binary and hex conversions. They run locally in your browser — no data is sent to a server for calculation.
For production deployments, still validate against your vendor documentation and change-management process.
5 calculators
Hexadecimal & Binary Converter
Convert decimal integers to binary and hexadecimal for debugging. Use the calculator above. Use the calculator above. Free browser tool.
Image Resize Calculator
Scale pixel dimensions and estimate uncompressed size at 24 bpp. Use the calculator above. Use the calculator above. Free browser tool.
Random CSV Test Data Generator
Estimate CSV fixture size from row, column, and seed settings. Use the calculator above. Use the calculator above. Free browser tool.
Subnet Mask / CIDR Calculator
Calculate IPv4 address counts, usable host counts, and a CIDR mask integer from a prefix length for network planning. Free browser tool.
UUID Generator
Deterministic UUID-like segments from a seed for test fixtures. Use the calculator above. Use the calculator above. Free browser tool.