Free API Cost Calculators for Developer.

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Access 16 complimentary calculators to project actual API expenses prior to development. These tools include an LLM token cost estimator for models like GPT-5, Claude, Gemini, and DeepSeek. Also featured are calculators for vector database pricing from Pinecone, Qdrant, and Supabase, along with embedding API costs. You can evaluate payment processor fees for Stripe, Paddle, and Lemon Squeezy, plus auth provider pricing from Clerk, Auth0, and Supabase. Additional resources cover cloud VPS comparisons, serverless cost calculations, and nine more tools. No registration or advertisements are required, only straightforward figures. This resource was created after repeated unexpected API billing experiences.