Free online calculators
Practical calculators for planning work before you commit. The first tool estimates LLM API spend from a prompt; more everyday calculators will land here over time.
Why show the working
A single dollar figure without inputs is impossible to check. Every calculator here surfaces the assumptions it used — token estimates, cache settings, volume — so you can confirm it answered the question you actually asked before you paste a number into a budget or a ticket.
LLM pricing moves often. Prefer tools that show a pricing-reviewed date and let you override token counts from an official tokenizer when an invoice depends on it.
What the AI token cost calculator covers
The calculator estimates spend for major hosted models — OpenAI GPT, Anthropic Claude, Google Gemini and comparable APIs — from the text you paste or type. It counts input and output tokens, applies published per-million rates, and can factor in prompt caching where a provider offers it.
Use it when you are scoping a feature (“what does summarising 500 support tickets cost?”), comparing vendors before a contract, or sanity-checking an invoice. It is a planning aid, not a billing system: real usage can differ when a model truncates context, retries a failed call, or applies volume discounts your account manager negotiated.
How to read the estimate
Paste representative text — a typical user message, a chunk of documentation, or a redacted support ticket — rather than a one-word prompt. Longer samples produce more realistic token counts because whitespace, markdown and JSON structure all consume tokens.
If the calculator shows a range, treat the upper bound as your safety margin for bursty traffic. Batch jobs that run overnight can spike input size when users attach files or when retrieval injects extra context. For production systems, multiply the per-call estimate by expected daily calls and add headroom for retries.
Privacy on calculator pages
Like every other tool on PixelAndPDF, calculators run entirely in your browser tab. The prompt you paste for token counting is processed locally — it is not logged, stored or sent to our servers. That matters when the sample text contains customer data, unreleased copy or internal identifiers.
Close the tab when you are done if you are on a shared computer. Nothing persists after the tab closes, which is the same behaviour as our file converters.
When to use a calculator vs a guide
Open a calculator when you need a number for a deck, a purchase request or a capacity plan. Open a guide when you need context — for example how prompt caching changes spend, or how image-generation APIs price differently from chat completions.
The guides index includes longer reads on AI models and security news; each links back to calculators or converters when there is a practical next step. Calculators and guides are meant to work together, not replace each other.
Frequently asked questions
Are PixelAndPDF calculators free?
Yes. The AI token cost calculator and any future calculators here are free with no account. Estimates run in your browser and nothing you paste is uploaded.
Which AI models does the token cost calculator support?
It covers major hosted APIs including OpenAI GPT, Anthropic Claude and Google Gemini, using published per-million input and output rates. Check the tool page for the exact model list and the date pricing was last reviewed.
Is the token estimate exact?
It is a planning estimate. Real bills can differ when providers round tokens, apply discounts, truncate context or retry failed calls. Use an official tokenizer when an invoice must match to the cent.
Does the calculator send my prompt to a server?
No. Token counting and pricing math happen locally in your tab, the same way file converters work here. Close the tab when finished on a shared machine.
Why show input and output tokens separately?
Most APIs price them differently — output is often several times more expensive per token. Splitting the line items makes it obvious where spend grows when you lengthen model replies.
Can I estimate cost for a whole month of API calls?
Multiply the per-call estimate by expected daily volume and working days, then add headroom for retries and traffic spikes. The calculator is best for a representative sample; scale the result in a spreadsheet for capacity planning.
What is prompt caching and does it affect cost?
Some providers charge less when repeated prompt prefixes hit cache. If the calculator exposes a caching toggle, use it when your app sends the same system prompt or document chunk on every request.
Will more everyday calculators be added?
Yes. This hub will grow beyond AI pricing — unit converters, date math and similar utilities that belong in the browser. Each gets its own page with the same no-upload privacy model.
Where do I read about AI models before buying tokens?
The guides index includes longer articles on model releases, security and industry news. Start there for context, then return here when you need a number for a budget.
How is this different from the vendor’s own pricing page?
Vendor pages list list prices. This calculator lets you paste your actual prompt, see token counts and combine input plus output in one place — useful when you are comparing two models on the same workload.