Translation API Cost Calculator

Translation API cost calculator

✓ Last verified: 2026-07-15· Source: official provider pricing page· Auto-monitored — report change →

Machine translation is billed per character — and the spread between providers is huge, before you even consider translating with an LLM. Enter your monthly volume and this tool ranks Google, DeepL, Amazon, Azure and LLM translation (GPT-4o mini, Gemini Flash) by real cost, subtracting free tiers, so you can see how much you'd save by switching.

Translation is priced by the character — and the range is wide

Unlike most APIs, machine translation bills on characters processed, not requests or tokens. That makes cost easy to forecast: it's just your monthly character volume times a per-character rate. The catch is how much that rate varies. Azure Translator's standard tier sits near $10 per million characters, Amazon Translate around $15, Google Cloud Translation about $20, and DeepL API Pro roughly $25 — so the priciest dedicated option costs about 2.5× the cheapest for the same work. DeepL commands the premium on translation quality for European languages; the AWS/Azure/Google options win on price and on being inside a cloud you already use.

The LLM disruption

Small LLMs upended this market. Because they bill by token and a character is a fraction of a token, translating with GPT-4o mini or Gemini Flash can cost well under $1 per million characters — often 10–50× cheaper than dedicated MT. For high-volume, informal content — user reviews, chat, product descriptions — that difference is enormous, and the LLM can adjust tone or summarize in the same call. What you give up is consistency and the professional features MT was built for: glossaries to lock brand terms, formality control, document-format preservation, and predictable quality across obscure language pairs. The honest answer for many teams is both: LLM for bulk casual text, dedicated MT for anything formal or legal.

Free tiers cover more than you'd think

Before paying anyone, check the free allowances. Google gives 500,000 characters/month, DeepL API Free 500,000/month, Azure's F0 tier 2 million/month, and Amazon Translate 2 million/month for the first year. A small app localizing its own UI or a modest content flow can sit entirely inside the free tier indefinitely. Toggle "Apply free tiers" above to see which providers charge you nothing at your volume. When translation is one piece of a larger pipeline, roll it into the API stack cost calculator, and if you're using an LLM, size the token side with the LLM token cost calculator.

How to use it

1. Pick your unit — characters, words, or pages — and enter the monthly volume.
2. Choose whether to apply each provider's free tier.
3. Read the cheapest option overall, the cheapest dedicated MT, and the cost per million characters.

Common mistakes

Counting words, billing characters. MT charges per character, so a 500-word page is ~3,000 characters — the calculator converts for you. Ignoring the output side on LLMs. You pay for both the source text in and the translation out; this tool counts both. Missing free tiers. At low volume the right answer is often "$0" — don't pay for what a free tier covers. Assuming LLM quality equals MT. Test your actual language pairs before switching formal content to an LLM.

FAQ

What is the cheapest translation API?

On dedicated MT, Azure Translator's standard tier is usually cheapest per character, followed by Amazon Translate. Overall, LLM translation with a small model is cheaper still. The calculator ranks all of them for your volume.

How are characters counted?

Providers count characters of source text, including spaces. Google and Amazon bill source characters; some endpoints count both source and target. This tool estimates on source volume, which matches the common billing model.

Is DeepL worth the higher price?

For European-language quality and nuance many teams think so. For bulk or informal content where cost dominates, cheaper MT or an LLM usually wins. Match the tool to the content, not the other way around.

Can I translate documents, not just text?

Yes — Google, DeepL, Amazon and Azure all offer document translation that preserves formatting, usually billed on the characters inside the document. Rates can differ from plain text; check the document endpoint.

Estimate only. Prices are reference figures for 2026 and change — verify current per-character rates with each provider before committing.

Frequently asked questions

How much does a translation API cost per million characters?

Dedicated machine-translation APIs charge per character. In 2026 typical list rates are roughly $10 per million characters for Azure Translator, $15 for Amazon Translate, $20 for Google Cloud Translation and $25 for DeepL API Pro. LLM translation with a small model like GPT-4o mini or Gemini Flash is dramatically cheaper per character — often under $1 per million source characters — because you pay by token, though quality and formatting guarantees differ.

Is it cheaper to translate with an LLM or a translation API?

On raw price, small LLMs are far cheaper per character than dedicated translation APIs — frequently 10–50× cheaper. The trade-offs are consistency and features: dedicated MT gives you glossaries, formality control, document formatting preservation, batch translation and predictable quality across language pairs. LLMs shine for casual or high-volume content where cost matters most, and for cases where you want translation plus rewriting or tone changes in one call. Many teams use both — MT for formal documents, LLM for bulk UGC.

Do translation APIs have free tiers?

Yes. Google Cloud Translation includes 500,000 free characters per month, DeepL API Free covers 500,000 characters per month, Amazon Translate gives 2 million free characters per month for the first 12 months, and Azure Translator's free F0 tier covers 2 million characters per month. Small projects can run entirely inside these free allowances, so always subtract the free tier before comparing paid rates.