How much data does Google Translate use, and what works offline?

Translation apps are some of the most useful tools on a trip and among the cheapest in data, as long as you download languages before you go. Here is what needs a connection and what doesn't.

By eSIM Data Deals editorial deskPublished 7 November 2026Updated 7 November 20265 min read

Short answer

Typed translations use very little data, and with the language downloaded they use none: Google says downloaded languages let you translate without an internet connection, and for some languages camera translation works offline too. Download languages on Wi-Fi; Google calls the files small. Features beyond that may need data, so test in airplane mode before you travel.

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Key figuresoffline

Typed translation, online: very little data
With language downloaded: works offline
Camera translation offline: some languages (Google list)
Language files: "small" (Google), download on Wi-Fi
Android setting: Data usage → Downloaded languages
Test: airplane mode before the trip

On this page

How much data does a translation use?

Very little. A typed phrase and its translation are a few kilobytes of text, much like a message. Even a day of heavy use, dozens of phrases at shops, stations and restaurants, is small next to a few minutes of video. Camera and speech features send more: an image or a stretch of audio instead of a line of text. Without a published figure from Google, we treat translation as part of the "messaging and browsing" band in our usage chart, a few MB to tens of MB on a busy day.

The bigger point is that, with the right preparation, most translation needs no data at all.

What works offline in Google Translate?

Based on Google Translate Help, read 7 November 2026. Feature support varies by language; the app shows which languages can be downloaded.
Feature	Works offline?	What you need
Typed text translation	Yes	The language pair downloaded
Camera (point at a sign or menu)	For some languages	Downloaded language that supports instant camera translation
Saved phrases	Yes	Saved before you go
Speech and conversation features	Test it	May need a connection; check in airplane mode
Translating a whole website	No	A connection

Google's help page is direct about the key part: after you download a language, you can translate it without an internet connection, and for some languages you can translate text through the camera too.

How do I set up offline languages?

Connect to Wi-Fi. Google recommends it before downloading.
Open Translate and pick the language. Next to the language, tap Download. If there is no Download option, that language can't be used offline.
Check it shows as Downloaded. Saved languages are marked in the app.
On Android, choose how downloads behave without Wi-Fi. In Menu → Settings → Data usage → Downloaded languages, choose Ask before downloading if you want to avoid surprises on mobile data.
Test in airplane mode. Type a phrase, try the camera on a printed menu. What works now will work on the trip without data.

What about Apple's Translate app?

Apple's Translate app also supports downloaded languages for on-device translation. Download the languages you need on Wi-Fi from the app's language settings, then test in airplane mode the same way. Whichever app you use, the rule is the same: download at home, test offline, and treat mobile data as a backup for features that need it.

Which other offline downloads pair well with translation?

Offline maps. Google says downloaded areas let you navigate offline; download each city on Wi-Fi. See maps and navigation data.
Tickets and bookings. Save boarding passes, rail tickets and hotel confirmations to your wallet or as files.
Music and podcasts. Downloaded playlists use no travel data.

With these four downloads, many travellers find their daily data is mostly messaging and the occasional search, which a small plan covers.

When is mobile data worth it for translation?

When a language can't be downloaded, when you need a feature that works only online, or when you are reading a long web page in another language. All of these are light. If your plan has a daily full-speed cap, translation still works well after the cap for text, because the amounts are tiny; camera and speech features will be slower.

Do downloaded languages take much storage?

Google calls the files small, and the app shows each download before you confirm. If your phone is nearly full, remove languages you no longer need after the trip from the same screen (Remove next to the language). Storage, not data, is usually the reason to be selective.

How much would a day of online translation use?

Suppose you skip the downloads and translate everything online. As example arithmetic with our own planning assumptions (Google publishes no per-request figure): fifty typed phrases are a few hundred kilobytes; twenty camera translations, at an assumed allowance of up to about 1 MB each, are up to about 20 MB; ten minutes of conversation mode, budgeted like a voice note or app voice call, is under about 12 MB. Even a heavy online day stays in the tens of megabytes.

Planning assumptions, not Google figures: text a few KB per phrase, up to about 1 MB per camera image, conversation at the 54–72 MB/h app voice rate. With downloaded languages most of this needs no data.

So translation will never be what empties a plan. The reason to download languages is reliability: menus, signs and station names are often read in places with weak signal, on the underground, or after a daily cap, and the offline version works there.

What should I download before the trip?

The language of every country on the route, and English (or your own language) as the other side of the pair.
Any regional language you may meet on signs, if the app offers it.
An upgraded language pack if the app offers Upgrade; Google says that gives a higher-quality pack.
A few saved phrases for allergies, directions and transport, so they open instantly.

What if my language can't be downloaded?

Google's help page says that if there is no Download option next to a language, it can't be used offline. In that case keep a little data in reserve for translation, save key phrases as screenshots, and prefer typed text over camera and speech when the signal is weak, because short text requests get through a poor connection more easily than images and audio.

Does a smartwatch or tablet change anything?

Only where the device gets its data. A tablet on your phone's hotspot uses the same plan, and should have its own downloaded languages if you translate on it. Watch apps that pass requests through the phone use the phone's connection. The watch and tablet guide covers both.

Frequently asked questions

Does Google Translate work without internet?

Yes, for languages you have downloaded. Google's help page says that after you download a language you can translate without a connection, and that some languages also work with instant camera translation offline.

Can I download a language on mobile data?

Yes. Google says the files are small and that on Android you can allow downloads without Wi-Fi under Settings → Data usage → Downloaded languages. On a small travel plan, Wi-Fi is still the better place.

Does conversation mode use a lot of data?

Speech features send and receive small amounts of data, closer to a voice note than a video. If a feature doesn't work in airplane mode, assume it needs a connection.

Do I need to update downloaded languages?

Occasionally. Google's app offers Update or Upgrade next to a downloaded language. Do it on Wi-Fi before you go.

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Written and checked by the eSIM Data Deals editorial desk

We take data figures from the app makers' own help pages where they publish one, convert published bitrates with kbit/s × 0.45 = MB per hour, and label every planning assumption. We don't run paid reviews or publish prices. Editorial policy · How we get our figures · Who owns this site

Sources and how we checked

Figures were read from these pages on 7 November 2026. Apps change their settings and rates; if a number here disagrees with the app on your phone, trust your phone's own data counter. See how we get our figures.