If you already know you're going to buy data for your trip and the only thing left is to decide on the size, this guide is about that: how many GB you need for China depending on the number of days you'll be there and the type of traveler you are. Let me tell you something upfront that almost no one mentions: China is one of the few destinations where the same trip, with the same phone and the same apps, can consume significantly more data than in Italy or Thailand. And it's no coincidence; it's the Great Firewall.
The short answer: how many GB for China
For a 10-day trip to China, most people will be fine with 5 GB if they're mainly using maps, messaging, and a translator. If you upload photos and videos daily, budget 10 GB. And if you work remotely, 20 GB. In China, add an extra 20% over what you would spend in Europe.
That's the number, and I won't hide it at the end of the article. Now, for the nuance: that number varies due to three things, and only three. The first is the number of days, obviously. The second is your profile: someone who checks a map and replies to a family group chat doesn't use the same amount of data as someone who uploads three stories a day from the Great Wall. And the third, which most people underestimate, is how much Wi-Fi you'll actually catch. In China, hotel and cafe Wi-Fi exists and usually works, but many places ask for a Chinese mobile number to give you the code, and that's where your plan ends.
My general recommendation for China is simple: take the amount you would typically use for a similar trip in Europe and add between 20% and 30%. Not because I want to sell you more gigabytes, but because there are three data consumptions there that you don't have in other destinations: the camera-based translator used all day, the essential Chinese apps for payment and navigation, and—if you connect via a local provider—the extra cost of VPN encryption. If you're coming from the generic article about how much data you need for travel, this is the exception I mentioned.
Why China is unlike any other destination
The Great Firewall is not a rumor or a blogger's exaggeration. Within mainland China, as of today, virtually the entire Google ecosystem (search, Gmail, Maps, YouTube, Drive, Translator), WhatsApp, Instagram, Facebook, Messenger, X, Telegram, Signal, Reddit, and most Western media are blocked. Apple services, Bing, Outlook, and, of course, all Chinese services do work.
This has a direct consequence on your gigabytes that almost no guide connects: the blockade forces you to change tools, and the replacement tools consume data differently. You can't rely on Google Maps with a cached map as you would in any European city; you have to use Apple Maps (which works natively in China because Apple uses a Chinese mapping provider) or Amap/Baidu Maps on Android, which are much heavier apps, full of photos of places, reviews, and advertising. You can't just send audio via WhatsApp; you'll end up using WeChat. And you can't pay with your card in many places: you pay with Alipay or WeChat Pay, which are apps you open twenty times a day.
There's a technical detail that confuses many people: even if you manage to open Google Maps with a VPN, maps in China are intentionally offset due to the country's official coordinate system, so your blue dot might appear hundreds of meters from where you are. So, it's not just that it's blocked: even if you unblock it, it doesn't serve you well. All this is explained in more detail in the guide to internet in China, which is the sister article to this one.
The VPN toll: between 5% and 20% more data
Since almost everything Western is blocked, the natural reaction of a traveler is to install a VPN. And it works... to a certain extent, because the country actively pursues providers, and there are times when half of the VPNs stop connecting. But what interests us here is something else: a VPN makes you consume more data. It's not a myth. Encryption wraps each packet in another packet, and that wrapper takes up space.
I've looked at the published measurements, and the honest range is this: between 4% and 20% extra cost, depending on the protocol your VPN uses. Modern ones are quite efficient; classic ones, much less so.
| VPN Protocol | Data Overhead | For a 5 GB Plan |
|---|---|---|
| WireGuard (most modern) | ~4-6% | +200 to 300 MB |
| IKEv2 / IPsec | ~7-10% | +350 to 500 MB |
| OpenVPN (UDP) | ~17% | +850 MB |
| OpenVPN (TCP) | ~20% | +1 GB |
Translated to your trip: if you were going to spend 5 GB in ten days and spend the trip with OpenVPN activated, you could end up at 6 GB just by encrypting. And beware, because many consumer VPN apps use OpenVPN or similar efficiency proprietary protocols, and most people don't even check what protocol is set. Add to that that when the VPN is slow or disconnects, the phone retries connections, and MBs are also spent there. That's why my advice, if you're going to rely on a VPN, is to count on 20% more gigabytes and be at ease, instead of fine-tuning to the millimeter.
The alternative: accessing the internet outside of China
Here's the good part, and it's important to understand it well because it changes the GB calculation. When you use mobile data from a foreign operator within China, your traffic doesn't exit to the internet through the Chinese gateway: it exits through the gateway of the operator providing you service, which in practice is usually in Hong Kong, Singapore, or another country. That is, your connection enters China through the international gateway and is managed outside the firewall. That's why many people find Google, WhatsApp, or Instagram work with mobile data without installing anything.
This is not a trick or a marketing promise: it's how international roaming works, and China respects it because international telecommunications transit is covered by ITU agreements. That said, don't take it as an absolute guarantee: it depends on the operator your line connects with, and there are occasional reports of people experiencing worse performance. If something is critical for you, have a backup plan.
A very important nuance that almost no one mentions: this only protects your mobile data. The moment you connect to hotel or cafe Wi-Fi, you're back inside the firewall, because that Wi-Fi accesses the internet through China. It's exactly the opposite of what we do on other trips.
And what does this imply for gigabytes? Two contradictory things. The good: if you don't need a VPN, you save the 5-20% overhead of encryption. The bad: since free Wi-Fi leaves you without access to half the internet, you'll be relying on mobile data many more hours than you would in another destination. That's why, in practice, in China you still need more GB. I elaborate on all this in the eSIM for China guide.
What each activity consumes, in actual MB
Let's look at the numbers. These are average consumption figures; your phone may vary depending on video quality, screen resolution, and your settings, but they are perfectly suitable for sizing a plan.
| Activity | Approximate Consumption | Note for China |
|---|---|---|
| Text messaging (WhatsApp, WeChat) | 5-10 MB/hour | Negligible |
| Map navigation (Google Maps) | 3-5 MB/hour | You won't use it: offset maps |
| Navigation with Amap or Baidu Maps | 20-40 MB/hour | Much heavier apps |
| Browsing websites and searching for places | 50-100 MB/hour | Same as any destination |
| Scrolling social media (Instagram) | 600-900 MB/hour | The big data hog |
| TikTok / Douyin | 900 MB-1.2 GB/hour | The absolute champion |
| Uploading 20 photos a day to the cloud | 60-100 MB/day | Disable with data |
| Uploading a 1-minute video | 50-150 MB | Per video, not per hour |
| Video call (WhatsApp, FaceTime) | 200-400 MB/hour | ~5 MB per minute |
| Streaming music (normal quality) | 50-100 MB/hour | High quality, up to 600 MB |
| Streaming video (standard quality) | 500 MB-1 GB/hour | Download before leaving |
What I want you to see from this table: everything useful for a trip is cheap in data, and everything for entertainment is very expensive. Maps, messaging, finding a restaurant, and sending a location don't even reach 150 MB on a busy day. Half an hour of short videos on the subway does. If you want the figures broken down in more detail, I have them in the article on data usage statistics by activity.
The three expenses you only pay for in China
This is the part that makes China different when calculating gigabytes. There are three consumptions that in Portugal or Mexico you simply don't have, and that you do here.
1. The camera-based translator. In China, you'll use it much more than you think: restaurant menus without photos, ticket machines, subway signs outside the city center, ingredients in the supermarket, directions. Instant camera translation (the one that overlays text in real-time) is not free: it sends images to the server and can easily reach 50-100 MB on a day of intense use. Download the offline Chinese language pack before you leave and the cost drops almost to zero.
2. Maps. As we've seen: Google Maps won't serve you well there, and Chinese alternatives load much more content per screen. An entire day moving around Beijing with Amap open can easily consume 150-250 MB.
3. Mandatory local apps. WeChat is not just a chat: it's the country's social operating system, with mini-apps inside for booking, entering museums, or ordering at a restaurant. Alipay is the real way to pay. Didi is the Chinese Uber and constantly loads maps in real-time throughout the journey. They are not optional: without them, traveling in China is extremely inconvenient.
| China-Specific Expense | Daily Consumption | How to Reduce It |
|---|---|---|
| Camera-based translator | 50-100 MB | Offline Chinese package |
| Maps (Amap, Baidu, Apple Maps) | 150-250 MB | Download area and avoid satellite view |
| WeChat + Alipay + Didi | 100-200 MB | Little margin, they are necessary |
| VPN overhead, if used | +5% to +20% of total | WireGuard protocol if you can choose it |
The table: GB by profile and duration
Here is the core of the article. Find your profile, cross-reference with the number of days, and you have your number. These figures already incorporate the Chinese plus I mentioned, so don't add anything more.
| Profile | 5 days | 10 days | 15 days | 30 days |
|---|---|---|---|---|
| Tourist using maps, translator, and messaging | 3 GB | 5 GB | 8 GB | 15 GB |
| Traveler uploading photos and using social media | 5 GB | 10 GB | 15 GB | 25 GB |
| Digital nomad / business trip | 10 GB | 20 GB | 30 GB | 50 GB or unlimited |
| Family sharing a phone as a router | 8 GB | 15 GB | 20 GB | 40 GB |
A couple of honest points about this table. First: if you're staying for five days, sleeping in a hotel, and connecting to Wi-Fi at night for heavy data use, 3 GB will be plenty. I say this even though we sell larger plans, because I'd rather you come back than buy a 20 GB package and only use four. Second: the "family" profile isn't about people who spend more per person; it's that sharing a connection multiplies background consumption—updates, backups, a child watching videos on the high-speed train from Beijing to Shanghai.
Third: if your trip is a classic Beijing-Xi'an-Shanghai circuit, you'll spend many hours on high-speed trains, and people tend to watch videos then. If you know you're one of those, move up a step in the table or download your shows at home.
How to check your own consumption before you leave
Everything above is an average, and you are not an average. There's a very simple way to find out your real number, and it only takes a minute: check how much you've spent on your own phone in the last month.
On an iPhone: Settings > Cellular, scroll down to the end, and you'll see the total for the period, with a breakdown by app. Be careful, because the iPhone counter doesn't reset automatically; if you've never zeroed it, that number could be years old. If that's your case, tap "Reset Statistics" now and check it again in a week. On Android: Settings > Network & internet > SIM > Data usage (the name changes a bit depending on the brand), and there you'll find your monthly cycle and app ranking.
With that data, the calculation is direct: divide your monthly consumption by 30, and you have your MB per day. Now apply two corrections. First: at home, you use Wi-Fi many more hours than you will there, so multiply by 1.5 or 2 if you spend a lot of time in the office or at home during your daily life. Second: add the Chinese bonus, that 20-30% we talked about.
Real example: if you spend 4 GB per month, that's about 133 MB per day. With a 1.7 Wi-Fi correction, it comes to 225 MB, plus a 25% Chinese bonus: 280 MB per day. In ten days, 2.8 GB. A 3 GB plan works for you, and a 5 GB plan gives you margin. You see how the number comes out by itself when you look at your own data instead of relying on a table.
How to stretch your data there
With four adjustments made before you get on the plane, consumption can easily be cut in half. These are the ones that really move the needle in China:
- Download maps of the cities you're going to visit. In Apple Maps and Amap, you can save areas offline; in Maps.me or Organic Maps, entire countries.
- Download the Chinese language pack for the translator. This is the advice with the best effort-to-saving ratio on the entire list, and it also saves you if you lose coverage.
- Backups only via Wi-Fi. iCloud Photos, Google Photos, and mobile backups are, by far, the biggest invisible expense of a trip.
- Disable automatic video playback on Instagram, X, and WeChat, and set video quality to low or "data saver."
- Enable the system's Data Saver Mode. This cuts off background activity for apps you're not using.
- Download music, series, and podcasts at home. Five hours on a train with Netflix downloaded costs 0 MB.
Regarding Wi-Fi, in China it's advisable to reverse your habit. In other destinations, you connect to hotel Wi-Fi to save data; there, if you have a connection that goes outside the country, it's often in your interest to stay on mobile data for whatever you want to work and only use Wi-Fi for heavy tasks that do work internally (downloads, updates, Apple services, uploading to the Chinese cloud). I have the complete list of tricks in the guide on how to save data on a trip.
What happens if you run out of data?
Not much, and that’s the good news. If you run out of data, the connection simply stops: no surprise bill or overage charge, which was the drama of roaming fifteen years ago. You will be without mobile internet until you top up or find a Wi-Fi connection.
And topping up takes minutes: you log into your account, buy more data on the same line, and continue. You can also install a second profile, because a modern mobile phone can store several at once even if only one is active; if you’ve never tinkered with this, I explain it from scratch in What is an eSIM?.
That's why my advice is always the same: it's better to run out and top up than to buy too much. Unused GBs don't come back, and no one will refund you the price difference between 5 and 10 GB when you land.
There's one exception, and in China it carries more weight than elsewhere: if you run out of data in a country where public Wi-Fi asks for a local number and where the apps you know how to use are blocked, being stranded is more inconvenient than in Rome. So don't fine-tune your first plan too much if you're traveling alone, if you don't speak any Chinese, or if you depend on Didi to get back to your hotel at night. In that case, it seems reasonable to have a bit of a buffer: one step above what the table says, and you're good.
A practical tip: activate the usage warning in your phone's settings (you can set a limit and have it notify you when you reach it) so you'll know before you run out, not after.
Frequently Asked Questions
How many GB do I need for 10 days in China?
5 GB is plenty for most people on a ten-day trip for maps, translator, and messaging. If you upload photos and videos to social media every day, 10 GB. If you work from there, 20 GB. And if you sleep in hotels with good Wi-Fi, you can go down a notch.
Does a VPN use more data?
Yes, between 4% and 20% more, depending on the protocol. WireGuard adds around 4-6%; OpenVPN, between 17% and 20%. On a 5 GB plan, that's an extra 200 MB to 1 GB just for encryption. If you're going to rely on a VPN in China, factor in a 20% margin.
Do Google and WhatsApp work in China with a travel eSIM?
Normally yes, because traffic goes out to the internet outside of China. A line from a foreign operator connects through its home network (often Hong Kong or Singapore), so the country's filtering does not apply to it. It is not a contractual guarantee and depends on the operator, but it is the usual operation of international transit.
Can I use hotel Wi-Fi to save data?
Yes, but with one major drawback: that Wi-Fi is inside the firewall. It's useful for downloading, updating, or using services that aren't blocked, but not for opening Instagram or Gmail without a VPN. Many establishments also send the access code via SMS to a Chinese number.
Do I need Google Maps, or can I manage with something else?
In China, Google Maps is not the right tool, even if you manage to open it. The country's maps are displaced by the official coordinate system, and your position may appear hundreds of meters off. On iPhone, use Apple Maps, which works natively; on Android, Amap or Baidu Maps. They consume more data, but they are reliable.
How much data does the camera translator use?
Between 50 and 100 MB per day if you use it heavily in instant mode, because it processes images against the server. It's a small expense compared to video, but in China you'll use it daily. Downloading the offline Chinese package before you leave reduces it to practically zero.
What if I run out of data halfway through my trip?
Nothing serious happens: the connection cuts off and that's it, with no overage charges. You top up from your account in a couple of minutes and continue. That's why I always recommend starting with just enough and extending, instead of buying too much "just in case."
Does sharing data with another mobile consume more?
Considerably more, and almost always under the radar. The second phone syncs mail, updates apps, and uploads photos without anyone noticing. If you're going to share the connection, go up a tier in the table and disable automatic backups on all devices.
Conclusion
If you take away one idea, let it be this: in China you need more gigabytes than you would use doing exactly the same thing in another destination. Not out of whim, but because the camera translator, local maps, and mandatory Chinese apps add up every day, and because if you connect via the local route, the VPN charges you a toll of 5% to 20% just for encryption. With that in mind, the number for most people is clear: 5 GB for ten days of normal tourist travel, 10 GB if you live on Instagram, 20 GB if you work from there. And if it's five days with good hotel Wi-Fi, 3 GB.
Check your real consumption for the last month before deciding, download the maps and the offline Chinese package, and buy just the right plan knowing that topping up on the fly is a matter of minutes. When you're clear on that, here's the eSIM for China with data from landing, ready to install before leaving home.
