Translation cost per word is the number most people compare first, and the honest answer is: professional human rates commonly cluster around ten US cents per word — roughly $1,000 per 10,000 words — and rise from there for specialized fields, rare language pairs, and rush deadlines. Free machine translation sits at the other extreme: zero cost, but also zero deliverable. This guide explains what per-word rates actually pay for, and where per-task AI pricing fits.
What a per-word rate pays for
When an agency quotes per word, the rate is not just translation time. It bundles:
- the translator's work itself
- a second linguist's review pass (or not — always ask)
- project management and file handling
- minimum charges that make tiny documents disproportionately expensive
That is why a 300-word document rarely costs 3% of a 10,000-word one. Fixed handling costs dominate small jobs, and per-word math only really works at volume.
What moves the rate up or down
Four drivers explain most of the spread you will see in quotes:
- Language pair. Common pairs cost less; rare pairs cost more because fewer qualified translators exist.
- Subject matter. A menu is not a medical device manual. Technical, legal, and medical source text demands terminology control and review, and the rate reflects the risk of getting a term wrong.
- Volume. Repetition and glossary reuse lower effective rates on large projects; one-off short jobs pay the minimum.
- Turnaround. Rush multipliers are real. Overnight delivery can double the rate.
How AI document translation is priced
AI translation services price differently — per task or per credit, not per word. GoodTrans, for example:
- estimates the cost before a task starts, so you decide with real numbers
- bills by billable units (words for Latin-script text, characters for CJK)
- runs the whole document asynchronously and delivers by email
You can see the current packages on the pricing page and start a task from the translate page.
What the cheap option leaves out
Free machine translation is genuinely useful for understanding a short text. What it does not produce is a deliverable:
- no glossary control, so a product name can translate three different ways in one file
- no document-level checks for missing paragraphs, changed numbers, or broken links
- no review artifacts — nothing to check against
- no file handling for long documents
If the translated text will only ever be read for gist, that trade is fine. If it will be edited, shared, or published, the missing pieces are the product.
A quick comparison
| Option | Typical cost profile | What you get |
|---|---|---|
| Free machine translation | $0 | Instant draft, no review trail |
| AI document service | Per-task credit price, shown upfront | Editable files, bilingual review, quality report |
| Human translator / agency | Commonly $1,000+ per 10,000 words | Full human authoring, project management |
The rows are not substitutes for every job — they serve different stakes.
How to estimate your own cost
- Count your source volume (words, or characters for CJK).
- Multiply by the per-word rate you were quoted — or submit the file to an estimate-first service and read the real number.
- Add the review layer you actually need: who reads the output, and with what?
The second step is where most surprise comes from, which is why estimate-first pricing exists. If you want to see what your document would cost before committing anything, the estimate on the translate page is free to check.
