AI Engineering Budget Planner
Plan the cost of your AI application before you build it.
Estimate LLM, RAG, embedding, and infrastructure costs in one place.
Popular Tools
Free, instant calculators — no planner required.
LLM Cost Calculator
Estimate API costs for LLM requests across providers and models.
Open toolToken Calculator
Estimate token usage from raw text before sending it to an LLM.
Open toolRAG Chunk Calculator
Calculate chunk counts from document size, chunk size, and overlap.
Open toolEmbedding Cost Calculator
Estimate the cost of embedding a document set for retrieval.
Open toolContext Window Calculator
See how much of a model's context window your prompt is using.
Open toolConfusion Matrix Calculator
Calculate accuracy, precision, recall, F1, and related metrics.
Open toolAI Project Planner
Tell us what you're building and how you expect people to use it. AI Budget estimates the monthly operating cost and breaks down the major components.
How it works
- 1Describe your application
- 2Enter expected usage
- 3Select models and infrastructure
- 4Get your estimated budget
- 5Find optimization opportunities
Learn
View all guides →What Are LLM Tokens?
How tokenization works and why LLMs measure text in tokens, not characters.
Read guideHow Does LLM API Pricing Work?
How input/output token pricing works and what actually drives your bill.
Read guideWhat Is a Context Window?
What counts toward a model's context window and how usage adds up.
Read guideWhy AI Budget?
Every basic tool and the planner are free to use immediately.
Results update instantly — no loading states, no waiting.
Every number traces back to a formula and an assumption you can see.
Built around the numbers engineers actually need to plan with.
Calculators run entirely in your browser — your input stays local.
Nothing is a black box. Change any assumption and see the number move.