16 free calculators to estimate real API costs before you build:
• LLM Token Cost (GPT-5, Claude, Gemini, DeepSeek)
• Vector Database Cost (Pinecone, Qdrant, Supabase)
• Embedding API Cost
• Payment Processor Fees (Stripe, Paddle, Lemon Squeezy)
• Auth Provider Cost (Clerk, Auth0, Supabase)
• Cloud VPS Comparison
• Serverless Cost Calculator
• + 9 more
No signup. No ads. Just the numbers.
Built because I kept getting surprised by API bills.
Free API Cost Calculators for Developer.Know your LLM, vector DB & API bill before it arrivesJun 2026