Prompt Token Cost Estimator
Estimate what an AI prompt will cost before you run it. Paste your prompt, enter your provider’s per-token prices, and get a transparent cost breakdown.
Prompt Token Cost Estimator
Enter your numbers below and hit Calculate — the answer appears instantly, computed entirely in your browser.
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What is Ai token cost calculator?
Prompt Token Cost Estimator — Estimate what an AI prompt will cost before you run it. Paste your prompt, enter your provider’s per-token prices, and get a transparent cost breakdown.
Token count is a rough heuristic: character count divided by 4, rounded up, labeled "rough estimate — real tokenizers differ" (real tokenizers like tiktoken or SentencePiece can differ 10–30%). Cost = tokens ÷ 1,000,000 × your entered price, computed separately for input and output. No provider prices are built in — every rate is typed in by you. Runs entirely in your browser.
Why use this ai token cost calculator?
Built for ai token cost calculator
Estimate what an AI prompt will cost before you run it. Paste your prompt, enter your provider’s per-token prices, and get a transparent cost breakdown.
Transparent & honest
Token counts are a chars÷4 heuristic, not a real tokenizer — expect 10–30% variance versus actual billing.
Private by design
Everything runs in your browser. Your inputs never leave your device.
Works everywhere
Fully responsive — perfect on desktop, tablet, and mobile. No app needed.
Regularly updated
Regularly maintained and reviewed to ensure accuracy.
Free forever
No accounts, no limits, no watermarks. Use Prompt Token Cost Estimator as much as you need.
How to use Prompt Token Cost Estimator
- 1Paste your full prompt into the Your prompt field.
- 2Enter the input and output prices per 1M tokens from your AI provider’s pricing page — this tool never guesses them.
- 3Enter how many output tokens you expect the response to use.
- 4Click Calculate to see the input, output and total cost with the full math shown.
- 5Re-run with a shorter prompt to see exactly how much each edit saves.
What can you do with Prompt Token Cost Estimator?
- Prompt token counter — Estimate what an AI prompt will cost before you run it.
- Gpt api cost estimator — Estimate what an AI prompt will cost before you run it.
- Llm pricing calculator — Estimate what an AI prompt will cost before you run it.
Good to know
- Token counts are a chars÷4 heuristic, not a real tokenizer — expect 10–30% variance versus actual billing.
- Prices are user-entered; the tool cannot verify them against any provider.
- Does not account for cached-input discounts, batch pricing, or provider-specific billing quirks.
How it works
Token count is a rough heuristic: character count divided by 4, rounded up, labeled "rough estimate — real tokenizers differ" (real tokenizers like tiktoken or SentencePiece can differ 10–30%). Cost = tokens ÷ 1,000,000 × your entered price, computed separately for input and output. No provider prices are built in — every rate is typed in by you. Runs entirely in your browser.
Examples
Shows the input-token estimate, the output cost for 600 tokens, and the combined total with all four math steps.
Zero prices give a $0.00 total — useful for sanity-checking free tiers without inventing any pricing.
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