Independent web tools studio
Small, accurate tools
people use every day
Complex calculations, straight from official data, usable in seconds. pitropatro builds and runs free web tools with every number sourced.
See services →Live services
LLM Cost Calculator
llmcost.pitropatro.comAPI cost calculator for 36 AI models from 6 providers. Agent runs, prompt caching and batch discounts, priced from official pages.
생활계산기 (Korean calculators)
calc.pitropatro.com13 calculators for life and work in Korea: take-home pay, severance, unemployment and parental leave benefits, using the official withholding tables and current statutory rates.
How we build
Every number has a source
Rates and prices are checked against official documents and published with their source and verification date.
Your inputs stay in your browser
Calculations run locally. Nothing you type is sent to or stored on a server.
Kept current
When laws or prices change we update right away. No stale numbers.
Contact
For partnerships, corrections or anything else, email us.
hywook4@gmail.com