If you've made it this far, it's because you've already decided you want data for your trip and just need to choose the package size. Let's get straight to the point: here I'll tell you how many GB you'll need for Australia, depending on how you travel, with real numbers and without inflating anything to sell you more. Australia has a peculiarity that almost no one calculates correctly: it's a long trip with many miles in between, so the daily calculation weighs much more here than on a weekend getaway to Europe. Three or four weeks completely change the number.
The short answer: how many GB for Australia
For three weeks in Australia, most people will be fine with 15 GB, about 700 MB per day. If you're going for 10 days and use maps, WhatsApp, and some social media, 8 GB will be ample. If you work remotely or are on a working holiday, estimate 20-30 GB per month.
That's the range that covers most of the people who write to me. And yes, I'm aware that telling you "8 GB is more than enough" sells a cheaper package than telling you "buy 30 GB just in case." I prefer that you come back.
The typical mistake with Australia is not running out of gigabytes, but calculating the trip as if it were a week long when it's actually twenty-one nights. No one goes to the other side of the world for five days: between flights, layovers, and jet lag, the minimum reasonable trip is three weeks, and many stay for four or five. Multiply your daily consumption by 21 instead of 7 and you'll see why the number skyrockets.
The flip side is that Australia is one of the few destinations where some of your days will consume almost nothing: in the interior there's no signal, and in cities, Wi-Fi is abundant and decent. So the final number doesn't grow linearly. If you want the general method I use for any destination, you can find it in the guide on how much data I need for travel; here I'll focus specifically on Australia.
Why Australia changes the calculation (and it's not what you think)
There are four factors that make the number of gigabytes in Australia different from a trip to Italy or Portugal, and it's important to understand them before looking at any table.
One: duration. This is the most dominant factor. A 21-day trip at 700 MB per day is 14.7 GB; the same profile on a 4-day long weekend is 2.8 GB. Nothing else changes the figure so much. That's why in Australia, consumption per day matters more than in any other destination: any estimation error is multiplied by twenty.
Two: distances. Sydney-Melbourne is almost 900 km by road; Cairns-Brisbane, over 1,700 km. You'll spend many hours navigating, listening to music, or watching videos in the car or on overnight buses. That adds up.
Three: the interior without coverage. Hundreds of kilometers of road without a single signal bar. You won't use data there, but the problem isn't the usage, it's that you need everything downloaded beforehand.
Four: cities are very well connected. Sydney and Melbourne have free Wi-Fi in public libraries, central train stations, shopping centers, museums, and a huge number of cafes. If you stay in a city, a good portion of your heavy consumption (uploading videos, backups, long video calls) can go through Wi-Fi. If you want details on how connectivity works there, I cover it in internet in Australia.
How much each activity you'll do actually consumes
Before deciding on a package, check these figures. These are what I use for calculations, and you'll see that apps you think consume a lot (maps, WhatsApp) are among the least, and those you consider harmless (a quick scroll at the airport) are the ones that eat up your package.
| Activity | Approximate Consumption |
|---|---|
| Google Maps navigating, with map already downloaded | 3-5 MB/hour |
| Google Maps without download, searching on the fly | 15-25 MB/hour |
| WhatsApp text and audio only | 5-15 MB/day |
| WhatsApp voice call | ~1 MB/minute (60 MB/hour) |
| WhatsApp or FaceTime video call | 5-12 MB/minute (300-700 MB/hour) |
| Instagram or TikTok scrolling | 500 MB - 1 GB/hour |
| Uploading a photo from your phone | 3-5 MB per photo |
| Uploading a 15-second story | ~5 MB |
| Uploading a 1-minute video in 1080p | 100-150 MB |
| Music streaming, normal quality | 70-100 MB/hour |
| Video streaming at 720p | 500 MB - 1 GB/hour |
| Video in 4K | 4-7 GB/hour |
| Email and web browsing | 10-20 MB/hour |
| Ordering an Uber or checking transport schedules | 2-5 MB per query |
| Automatic photo backup (if not deactivated) | 1-3 GB per week |
Notice what comes out of this: you can navigate with your phone eight hours along the Great Ocean Road and spend less than 40 MB, or lie down for twenty minutes in the hostel watching reels and spend 300 MB. The map is not the enemy. You have more detailed figures in the mobile data usage statistics by activity.
Master table: GB per profile and duration
This is the important table. Find your profile, cross-reference with the number of days you'll be staying, and that's your number. They are calculated with a reasonable margin, not cutting it close.
| Traveler Profile | 5 days | 10 days | 15 days | 30 days |
|---|---|---|---|---|
| Maps and WhatsApp, little else (~250 MB/day) | 2 GB | 3 GB | 5 GB | 10 GB |
| Photos and social media, average traveler (~700 MB/day) | 5 GB | 8 GB | 12 GB | 20 GB |
| Road trip with stories and daily video (~1.2 GB/day) | 8 GB | 15 GB | 20 GB | 30 GB |
| Digital nomad or remote work (~2 GB/day) | 10 GB | 20 GB | 30 GB | 50 GB |
| Family sharing, 3-4 phones (~1.5 GB/day) | 10 GB | 15 GB | 25 GB | 40 GB |
| Working holiday, daily life with home Wi-Fi (~800 MB/day) | — | — | 12 GB | 20-25 GB/month |
An important note: for Australia, the column you'll almost certainly look at is the 15-day or 30-day one, not the 5-day one. If you're going for 21 days, take the 15-day value and add 40%; if you're going for 25, go straight to the 30-day value. Rounding up for a long trip costs very little extra money and saves you the worry of constantly checking your usage.
And if you're debating between two rows, go with the higher one and top up if necessary. It's cheaper than overpaying on the first day.
The Outback and inland roads: hundreds of kilometers without coverage
This is the critical piece of information in the article and the one most people underestimate. Australia has excellent mobile coverage where people live and practically non-existent coverage elsewhere. Telstra, the operator with the largest network in the country, reports coverage for about 99.7% of the population but only about 39% of the territory, roughly 3 million km² out of almost 7.7 million. In other words: outside of cities, towns, and major coastal corridors, there is no signal.
In the interior, you can drive 200, 300, or more kilometers without a single bar, and gas stations (roadhouses) are just as far apart. Routes like the Stuart Highway, the Nullarbor, or any detour to central national parks fall into this category.
People ask me how many gigabytes they need for the Outback. The honest answer is: almost none, because you won't have anything to spend them on. What you need is to have everything downloaded beforehand.
What to do before heading inland:
- Download offline maps for the entire area on Google Maps or Maps.me. GPS works without coverage; what's missing is the map.
- Download music, podcasts, and series for long drives.
- Save screenshots of reservations, addresses, and emergency phone numbers.
- Tell someone your route and estimated arrival time.
- For truly remote routes, your phone is not a safety system: carry a locator beacon or satellite phone.
The practical effect on your gigabytes is that two or three days in the Outback consume what a single day in Sydney does. This is already accounted for in the table above.
Road trips: Great Ocean Road, East Coast, and Red Centre
The road trip is the star format in Australia and has a very recognizable consumption pattern: many hours of driving, low consumption while driving, and a big peak at night when you arrive at your accommodation and upload everything from the day.
On the Great Ocean Road (about 240 km between Torquay and Allansford, which most people do in two or three days) there is coverage in towns and dead zones in between. It's a short route compared to others, but it's where the most photos are taken per kilometer. The East Coast—Sydney, Byron Bay, Brisbane, Whitsundays, Cairns—is well covered almost all the way. The Red Centre, not so much.
| Type of Day | What you do | Estimated Consumption |
|---|---|---|
| City day (Sydney, Melbourne) | Maps, transport, cafes with Wi-Fi, social media | 300-600 MB |
| Coastal road trip day | Navigation, music, photos, irregular coverage | 500-900 MB |
| Outback day | Poor signal for most of the day | 50-200 MB |
| Great Barrier Reef or excursion day | Phone put away, uploads at night | 200-500 MB |
| "Catch-up" day | Uploading videos + long video call home | 1.5-3 GB |
| Work-from-accommodation day | Email, Drive, some meetings | 1.5-2.5 GB |
If you add up a realistic three-week trip—say 7 city days, 8 road days, 3 excursion days, and 3 catch-up days—you'll get between 11 and 16 GB. Which is exactly the range I gave you at the beginning. The numbers add up when you break them down by day type instead of relying on intuition.
Great Barrier Reef, diving, and excursion days
Here's good news and a trap. The good news: boat and diving days consume very little. Your phone stays in a dry bag or locker, you go five or six hours without touching it, and out in the open sea of the Great Barrier Reef, coverage is patchy anyway. A day trip to the cays from Cairns or Port Douglas rarely exceeds 300-400 MB.
The trap comes at night. You return with 200 photos and three videos from your GoPro, and that's where your data package disappears. If you have automatic backup activated and not restricted to Wi-Fi, your phone starts uploading all of that as soon as it gets a signal, without asking you. On a three-week trip, this can mean several gigabytes you didn't even know you were spending.
Three specific things for these days:
- Set Google Photos or iCloud to "Wi-Fi only" before leaving home. It's the setting that saves the most gigabytes on the entire trip.
- If you record with a separate camera or GoPro, transfer the material to your laptop and upload from your accommodation.
- If you want to share something on the same day, upload one or two photos, not the entire camera roll.
Calculated this way, water days are almost free in terms of data and compensate for city days, which are the ones that consume the most. If your trip involves a lot of snorkeling, diving, hiking, and national parks, you can go down a notch in the profile table.
Photos and videos: the trip's biggest data hog
Australia is heavily photographed. Between landscapes, kangaroos, coral, and sunsets, people return with thousands of files. And the format in which you share them changes consumption by a factor of one hundred, literally.
| What you upload | Size per file | In 3 weeks (3 per day) |
|---|---|---|
| Phone photo (12 MP, HEIC/JPG) | 2-4 MB | ~0.2 GB |
| 15-second story | ~5 MB | ~0.3 GB |
| RAW photo or from separate camera | 15-25 MB | ~1.3 GB |
| 30-second Reel or TikTok in 1080p | 50-75 MB | ~3.8 GB |
| 1-minute video in 4K | 300-400 MB | ~22 GB |
The takeaway is simple: if you share photos, the impact is negligible. If you share 4K video from mobile data, no reasonable package will suffice. The solution is not to buy 100 GB, it's to lower the upload quality or wait for the accommodation's Wi-Fi, which you'll have almost every night in Australia.
One setting that almost no one touches and works very well: on Instagram, activate "use less data" (Settings > Cellular Data); on TikTok, data saver mode; and on your phone, disable automatic video playback on social media. Just with that, a "photos and social media" profile drops from 700 to about 450 MB per day, which means 5 GB less over 21 days. It can be the difference between buying 20 GB or 12 GB.
Working holiday and long stays: a different calculation
If you're on a working holiday visa, or staying for three months or more, stop thinking about "data for the trip" and think about "monthly plan," because your pattern will be closer to living there than to tourism.
The main difference is that you'll have fixed Wi-Fi most of the time: in shared accommodation, in the hostel, at work, in the library. Mobile data consumption will be concentrated during commutes, breaks, and weekends. With that pattern, most people use 15-25 GB per month, and those who heavily stream music and video outside the home go up to 30-40 GB.
What does skyrocket are two things: video calls home to Spain (at 300-700 MB per hour, two long calls per week are 3-5 GB per month) and periods of farm work or rural employment, where you might end up in an area with limited coverage and no decent Wi-Fi, in which case your phone becomes your only connection.
My practical recommendation for long stays: start with a 20-25 GB monthly package for the first month, check your actual consumption after 30 days, and adjust from there. It's cheaper to make a mistake for one month than for twelve. If you're staying for months, also look at the available options and durations in the eSIM for Australia guide, because not all packages are designed for long stays.
How to know your real consumption before leaving home
All of the above are averages. Your exact number is already on your phone, free, and takes two minutes to check. This is the most useful tip in this guide.
On Android: Settings › Network & Internet › SIMs / Data usage › App data usage. On iPhone: Settings › Mobile Data, and scroll down to see the breakdown by app (note: the iPhone counter is cumulative since the last manual reset, so check the date at the very bottom before trusting it).
Take your usage from the last full month and divide it by 30. That's your daily usage in your normal life. Now adjust it:
- Add 20-30% for maps, translator, constant searches, and travel photos.
- Subtract what you use at home on Wi-Fi and will also use on Wi-Fi there (Netflix on the couch, large downloads).
- Multiply by the number of travel days and round up to the next package.
Real example of how I do it: if I use 6 GB a month at home with Wi-Fi at home and the office, that's 200 MB daily; +30% is 260 MB; for 21 days in Australia, that's 5.5 GB. Since I know I take many more photos and stories when traveling, I take 8-10 GB and feel at ease. This method is much more reliable than any generic table, including my own. If this is also your first time with this technology, here I explain what an eSIM is and how the counter works.
How to stretch your GBs and what happens if you run out
Before buying the big package "just in case", try to reduce your consumption. On a three-week trip, these adjustments easily save between 4 and 8 GB:
- Downloaded offline maps of all route areas before leaving. Direct savings and it also saves you in the Outback.
- Photo backups only via Wi-Fi. The most cost-effective adjustment of all.
- Video autoplay disabled on Instagram, TikTok, X, and Facebook.
- System data saver mode activated (Android and iOS have it as standard).
- Music and series downloaded before car journeys or internal flights.
- App updates only via Wi-Fi. A batch of updates can be 1 GB.
What if you still run out? You top up. It takes a couple of minutes and you don't have to change anything on your phone. That's why my advice is always the same: it's better to run short and top up than to overbuy. If you buy 30 GB and use 11, you've wasted money and there's no refund possible. If you buy 12 and need 4 more, you pay for 4 more.
The only precaution: top up when you have 15-20% of the package left, not when you reach zero, because you need a connection to buy, and on the road, you might not have one at that moment. You have the complete list of tricks in how to save data on your trip.
Frequently Asked Questions
How many GB do I need for 2 weeks in Australia?
Between 10 and 12 GB covers most people for 14 days. If you only use maps and WhatsApp, 5 GB is more than enough. If you post stories daily and upload videos, plan for 15-20 GB. Duration is key: remember that in Australia, 3 weeks is normal, not 2.
Is 5 GB enough for a month in Australia?
Only if you are very conservative and always sleep with Wi-Fi. 5 GB in 30 days is 170 MB per day: enough for maps, messaging, and occasional lookups, but no social media or video. For a normal month-long trip, you need 20 GB; for a working holiday month with Wi-Fi at home, 20-25 GB.
Is there mobile coverage in the Outback?
Generally no, and this is the most underestimated point. The network covers about 99.7% of the population but only about 39% of the territory. In the interior, you can go 200-300 km without a signal. It's not about gigabytes: it's about having maps, music, and reservations downloaded before you leave.
How much data do I need for a working holiday?
Between 15 and 25 GB per month for most. You will have Wi-Fi at your accommodation and work, so mobile data will be used for commutes and weekends. If you make a lot of video calls to your home country (300-700 MB per hour) or end up in a rural area without Wi-Fi, increase to 30-40 GB.
What happens if I run out of data halfway through my trip?
Nothing dramatic happens: you top up and continue. Your phone will stop having data, but you can connect to any Wi-Fi and buy more in a couple of minutes. The advice is to top up when you have 15-20% remaining, especially if you are on the road, because you need a connection to do so.
Do I use data even if I don't use my phone?
Yes, and on a long trip, it's noticeable. Backups, updates, email synchronization, and background apps can amount to several hundred MB per day without you touching the screen. Restrict backups to Wi-Fi and activate data saver: over 21 days, that's the difference between 12 and 18 GB.
Can I share data with my partner's phone?
Yes, by activating the hotspot or Internet sharing. This is why the "sharing family" row in the table makes sense: a single large package is usually better than several small ones. However, the sharing phone uses more battery, and on road trip days, that matters.
Do I need unlimited data for Australia?
Almost no one needs it, not even for month-long trips. It only makes sense if you work remotely daily from your phone, stream in high quality, or will share a connection with several laptops. For tourism, even intense, 20-30 GB covers a long month with plenty of margin.
Conclusion
To summarize without beating around the bush: for a typical three-week trip to Australia, 15 GB is the number that works for most people. If you're going for 10 days, 8 GB. If you travel light with your phone, with maps and messaging, drop down to 5 GB and it's fine. If it's a working holiday or remote work, plan for 20-30 GB per month and review your actual consumption after the first month.
And the two rules that will really save you money: set photo backups to "Wi-Fi only" before you leave home, and download offline maps for your entire route, especially if you're venturing into the interior. With that done, almost everyone spends less than they feared.
Once you have your number, choose the data package for Australia that fits your days and have the peace of mind of being able to top up without changing anything on your phone if you run short halfway through. That's better than paying double for gigabytes that will go unused.
