Hey Product Hunt 👋 Sergio here I built CalculadoraTokens.com after a month where my OpenAI bill came in way higher than I expected. I'd been testing prompts, iterating on system messages, running the same context through different models — and I had no clear picture of what each run was actually costing me until the invoice arrived. I started keeping a spreadsheet. Then I realized: this should just be a tool. So I built it. You paste your prompt, pick your model, and it tells you the token count and the estimated cost before you send anything. Simple as that. It's free and there's no account needed. I'd love to hear from anyone who's had the same "surprise bill" experience — and especially from those of you building products on top of LLMs who need to estimate costs at scale. What would make this more useful for your workflow?

Calculadora de Tokens IA

Know your AI costs before you hit send

Know your AI costs before you hit send