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Buying a travel eSIM or day pass means guessing how much data you'll use. Buy too little and you run out mid-trip; buy too much and you've wasted money. Here's a practical way to estimate, based on how you actually use your phone.
Key takeaways
- Light use (maps, messaging, email) may need under 1 GB per week, depending on habits.
- Moderate use (social media, photo uploads) can use several GB per week.
- Heavy use (video streaming, hotspotting) can use much more. Netflix says HD video uses up to 3 GB an hour.
- Check your own usage at home in Settings to estimate.
Estimate by activity
These are rough figures; actual usage depends on apps, settings and quality.
| Activity | Rough data use |
|---|---|
| Messaging (text) | Very little |
| Email without big attachments | Low |
| Maps and navigation | Low to moderate; offline maps save more |
| Web browsing | Moderate; image-heavy sites use more |
| Social media scrolling | Moderate to high, especially with autoplay video |
| Uploading photos | Several MB per photo; videos much more |
| Voice calls over apps | Moderate |
| Video calls | High |
| Streaming video | Netflix says up to 1 GB an hour in SD and up to 3 GB an hour in HD on its highest setting |
| Hotspotting a laptop | Can be very high, from updates and syncing |
Light use
Maps, messaging and email may use under 1 GB per week, depending on habits. If you mostly navigate, message and check email, with Wi-Fi at your hotel, a small plan of 1 to 3 GB may cover a one-week trip.
Moderate
Social media and photo uploads can use several GB per week. If you post daily, scroll social feeds, and browse often, plan for something like 3 to 10 GB for a week.
Heavy
Video streaming and hotspotting can use much more. Use Wi-Fi for those. If you stream, make video calls, or work from a laptop over your phone, consider a larger or unlimited-style plan, and check its fair-use limits.
Check your own usage
Check your own usage in Settings at home to estimate. - iPhone: Settings, then Cellular. Scroll to see usage since the last reset. Tap "Reset Statistics" at the bottom a week before you travel to get a clean weekly number. - Android: Settings, then Network & internet, then Data usage (or Mobile data usage).
Remember that you'll probably use more data abroad than at home, since you'll rely on maps and translation more and may have less Wi-Fi.
A simple formula
- Measure your typical weekly use at home.
- Add 20% to 50% for extra maps, translation and photo sharing.
- Subtract what you expect to do on hotel Wi-Fi.
- Multiply by the number of weeks.
- Choose a plan a bit above that number, or one that lets you top up.
Ways to use less data
- Download offline maps, playlists and shows on Wi-Fi.
- Turn off video autoplay in social apps.
- Set photo and cloud backup to Wi-Fi only.
- Turn on Low Data Mode (iPhone) or Data Saver (Android).
- Turn off automatic app updates on cellular.
- Lower streaming quality in your video app's settings.
Top-ups vs. big plans
Many travel eSIMs let you top up when you run low. Starting with a moderate plan and topping up can be cheaper than buying a large plan you don't use. Check validity, too: a plan that expires after 7 days won't cover a 10-day trip. Compare price per GB and validity days, not just the headline price.
Sharing with others
Hotspotting from one phone can be cheaper than buying several plans, but laptops and tablets use more data than phones, especially when syncing photos or downloading updates. Turn off automatic updates on connected devices.
What if I run out?
Most providers let you buy more data in their app or website. If you're out of data and can't connect, use free Wi-Fi to top up. Keep the provider's app installed and logged in before you travel. For roaming tips, see how to avoid surprise roaming charges.
Frequently asked questions
How much data do I need for a week of travel?
Light users may need under 1 GB, moderate users several GB, and heavy users who stream or hotspot much more. Check your usage at home and add a margin.
Is 1 GB enough for a week abroad?
It can be for light use such as maps, messaging and email, with hotel Wi-Fi for anything heavier. Social media and video quickly use more.
How much data does Google Maps use?
Navigation itself uses relatively little data, but loading map areas and satellite imagery adds up. Downloading offline maps on Wi-Fi saves the most.
How much data does streaming video use?
According to Netflix, up to about 1 GB per hour for standard definition and up to 3 GB per hour for HD on its highest data setting. Lower settings use less.
Sources
Official sources this article relies on, checked October 15, 2026. Rules and prices change, so confirm details at the source.
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eSIM providers worth comparing
We may earn a commission if you buy through these links, at no extra cost to you. These are sponsored links. We haven't tested every network in every country, so check coverage and current prices for your destination before you buy.
- Jetpac: travel eSIM data packs for 200+ destinations, bought on its website or app. You install the eSIM once and top it up for later trips, and a pack starts when you connect to a network abroad. Hotspot sharing is allowed, and its free SmartDelay perk gives a lounge pass if a registered flight is delayed an hour or more (register at least 24 hours before departure). Data only, no regular SMS.
- eSimania: prepaid, data-only eSIM plans for single countries, regions (such as a 41-country Europe plan) and a global plan, with different data amounts and validity periods. You install by QR code or with the activation details from your order. Note: eSimania isn't available to readers in Australia through our link.
See Jetpac's eSIM plansSee eSimania's eSIM plans
Both are data-only. eSimania isn't available to readers in Australia through our link. Check your phone supports eSIM and the coverage for your destination first.
Before buying any eSIM: make sure your phone is unlocked and eSIM-compatible, compare GB, validity days and price per GB, and read the provider's refund policy.