Token Calculator Online — Count LLM Tokens, Cost & Tokens to Words
Free token calculator online: count GPT / LLM tokens with tiktoken (cl100k, o200k), estimate cost, and convert tokens to words (e.g. 10000 tokens ≈ 7,500 words). Client-side tiktoken online tool.
Count tokens before you spend.
Spoold's Token Calculator Online is a free tiktoken online counter: paste a prompt, see token / word / character counts, convert a token budget to approximate English words, and get an illustrative USD estimate for current models (GPT, Claude, Gemini, Grok, DeepSeek, and more).
What is a token calculator?
LLMs bill and truncate by tokens, not words. A token calculator uses an encoding like cl100k_base or o200k_base (tiktoken-style) to count pieces of text the model actually sees. Spoold also shows a quick approximate mode when you only need a ballpark, plus a tokens → words estimator for planning (“how much prose is 10k tokens?”).
When to use it
Prompt budgeting
Keep system + few-shot + user message under your context limit before shipping.
Cost planning
Pick a model row (or custom $/1M) and set expected output tokens for a rough total.
Tokens to words
Convert budgets like 10,000 tokens to ≈7,500 English words for docs and decks.
With images
Add vision separately with the image token calculator.
Example: rough scale for 10,000 tokens
English prose often averages near ~0.75 words per token and ~4 characters per token. That means:
| Budget | ≈ Words | ≈ Characters | ≈ Pages (500 w) |
|---|---|---|---|
| 256 tokens | ~190 | ~1,000 | 0.4 |
| 10,000 tokens | ~7,500 | ~40,000 | 15 |
| 128,000 tokens | ~96,000 | ~512,000 | 192 |
Code, CJK, and rare names can use far more tokens per “word.” Always re-count the real prompt with tiktoken when it matters.
How to count with Spoold
- Open /tools/token-calculator (alias: tiktoken online).
- Paste or load the sample prompt.
- Choose
o200k_baseorcl100k_base(or approximate). - Select a model for the illustrative cost estimate; set expected output tokens.
- Use Tokens → words presets (256, 10k, 128k…) when you need a human-scale budget.
Tip: costs are illustrative
Vendor prices move. Treat Spoold rows as planning aids and confirm on the provider pricing page before budgeting production traffic.
Token calculator vs token budget vs vision tokens
| Need | Tool |
|---|---|
| Count a pasted prompt + rough $ | Token Calculator |
| Allocate context across system / RAG / reply | Token Budget |
| Image / vision input tokens | Image Token Calculator |
Related guides
Related search terms
Frequently asked questions
Is this the same as OpenAI tiktoken?
How many words is 10,000 tokens?
Does my prompt upload?
Are the dollar amounts invoices?
Which encoding should I pick?
Can I count image tokens here?
Count tokens now
Paste a prompt into the token calculator.
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