Show HN: I built a free API cost calculator after a $340 surprise invoice

Category: devtools

Tags: llm, api-cost, calculator

Score: 4.0/10 (Innovation: 3, Technical: 4, Documentation: 6, Utility: 5)

APICalculators is a web tool that estimates monthly LLM API costs across models like GPT-5.5 and Claude Sonnet, helping developers avoid surprise bills. It's interesting for its practical focus on budgeting for high-volume API usage, though it's a straightforward calculator with no complex backend.

Target audience: backend devs, data engineers

Repository: https://apicalculators.com/

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