AI Token Calculator
Estimate AI input tokens from text length and combine them with expected output tokens for API cost planning.
What does this calculator answer?
AI tokens are the units language models process. This calculator estimates input tokens from text and combines them with expected output tokens so you can plan API usage before sending requests.
Inputs
Results
Estimated input tokens
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Estimated total tokens
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Word count
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Before you enter values
- Enter the exact text or scenario you want to estimate for text to estimate.
- Enter expected output tokens in tokens so the estimate uses the same unit throughout.
How to read the result
- Start with 'Estimated input tokens'. This is the main output for the current assumptions.
- Then compare 'Estimated total tokens' so you do not judge the scenario from one number alone.
- Then compare 'Word count' so you do not judge the scenario from one number alone.
Formula
Rough English estimate: about 4 characters per token. Actual tokenization varies by model and language.
Example
If each support ticket uses about 500 input tokens and 150 output tokens, processing 10,000 tickets requires roughly 6.5 million total tokens.
Common mistakes
- Treating characters, words, and tokens as the same unit
- Forgetting output tokens
- Assuming every provider uses the same tokenizer
Sources and pricing
Prices and policies can change. Confirm official sources before budgeting.
Important note
This is an estimate. For exact counts, use the provider tokenizer or API usage response.
Review and update policy
This page was reviewed on August 6, 2026 for formula wording, default inputs, FAQ coverage, and related calculator links. Investing and AI cost calculators do not pull live market prices or account-specific pricing, so you should enter the latest values yourself.
When official sources are relevant, source links are provided on the page. If a formula, rate, or source is outdated, send the page URL and supporting reference through the contact page.