What is ai api cost calculator?
Building with AI APIs means paying for every token. A small change in prompt length or output length can change a monthly bill by hundreds of dollars.
This calculator lets you test scenarios before you launch. Enter your own token counts and the current prices from your provider.
How to use the ai api cost calculator
- Estimate the tokens in your average prompt and answer.
- Enter the prices per million tokens from the provider's pricing page.
- Enter your daily request volume to see the monthly cost.
How the ai api cost calculator works
Cost per request equals input tokens divided by one million times the input price, plus output tokens divided by one million times the output price. Daily and monthly figures multiply by request volume and 30 days.
Worked example
Common uses of the ai api cost calculator
- Budgeting a chatbot or content tool before launch.
- Comparing models with different prices.
- Finding how a longer prompt changes the monthly cost.
- Setting usage limits for a customer plan.
- Explaining AI costs to a client or manager.
Tips and common mistakes
Output tokens usually cost more than input tokens. Ask for concise answers when you can.
Caching and batch pricing can cut costs. Check your provider's options.
Background: what to know before you rely on it
AI providers bill separately for input tokens, the text you send, and output tokens, the text the model returns. Output tokens usually cost several times more because they are generated one at a time. Prices are normally quoted per million tokens and change often, with cheaper small models and pricier large ones. Techniques that lower bills include shorter prompts, prompt caching, batch processing for non urgent jobs, choosing a smaller model for simple tasks and limiting the maximum output length. Always add a safety margin for retries, tool calls and growth in usage.
Private, free and fast
This tool runs entirely in your browser. What you type or choose is not uploaded to a server and is not saved after you close the page, which keeps it fast and private. It is free to use as often as you like. See more in all ai tools, or browse the full list of tools.
Frequently asked questions
How do I calculate API cost?
Convert tokens to millions and multiply by the price for input and output separately.
Where do I find prices?
On your provider's pricing page. They change often.
Does it include other fees?
No.
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