About AIKit

AIKit is a free AI engineering toolkit: fast, focused calculators for the estimates engineers reach for constantly when building LLM and RAG applications — token counts, API costs, context window usage, chunking, and classic ML metrics.

Who it's for

AI/ML engineers, application developers, data scientists, students, and founders who need a quick, trustworthy number without spinning up a notebook or signing up for another account.

Our approach to accuracy

Every formula on this site is documented on its tool page so you can verify it independently. Where a number depends on external, frequently-changing data — like provider pricing — we clearly label it as example/demo data rather than presenting it as current fact. We'd rather show "undefined" than a misleading number.

Privacy

Every calculator runs entirely in your browser. Text and numbers you enter are never sent to a server.