How Much Mobile Data Do I Need for My Trip?
Estimate your travel data needs: typical usage for maps, social media, video calls and streaming, plus a simple GB guide for 1 to 4 week trips.
Buying too little data means hunting for Wi-Fi on day five. Buying too much means paying for gigabytes you never use. The good news: most travelers use far less than they expect, as long as they avoid a few data-hungry habits. Here is how to size your plan.
What uses data while traveling
These are rough, real-world estimates. Actual usage varies by app, settings and video quality.
| Activity | Approximate usage |
|---|---|
| Messaging (WhatsApp, iMessage, text only) | Under 5 MB per day |
| Maps and navigation | 5–20 MB per hour |
| Web browsing and email | 50–100 MB per hour |
| Social media with photos | 100–300 MB per hour |
| Social media with lots of video (Reels, TikTok) | 0.5–1 GB+ per hour |
| Voice calls over WhatsApp or FaceTime Audio | 20–50 MB per hour |
| Video calls | 0.5–1.5 GB per hour |
| Music streaming | 50–150 MB per hour |
| HD video streaming | 1.5–3 GB per hour |
The pattern is clear: maps, messages and browsing are cheap. Video is what eats data, whether you're streaming, video calling or scrolling short videos.
A simple guide by trip length
For a typical traveler who navigates, messages, posts some photos and browses (but mostly streams video on hotel Wi-Fi):
| Trip length | Light user | Average user | Heavy user |
|---|---|---|---|
| 1 week | 1–3 GB | 3–5 GB | 10 GB+ |
| 2 weeks | 3–5 GB | 5–10 GB | 20 GB+ |
| 3–4 weeks | 5 GB | 10–20 GB | 20 GB+ |
- Light user: maps, messaging and the occasional search.
- Average user: all of the above plus social media and a few video calls.
- Heavy user: frequent video, hotspot for a laptop, or working remotely.
Seven ways to make your data last
- Download offline maps in Google Maps or Maps.me before you go.
- Turn off auto-play for videos in Instagram, Facebook and X.
- Set app stores and photo backup to Wi-Fi only. A single iCloud or Google Photos sync can use gigabytes.
- Download playlists and shows at the hotel instead of streaming on the go.
- Use Low Data Mode on iPhone or Data Saver on Android.
- Watch your hotspot use. A laptop can burn through data far faster than a phone.
- Check your usage in your Simsiz account after the first day and adjust.
What if I run out?
Many plans support top-ups, so you can add data to the same eSIM without installing a new one. Look for the "Top-up available" label on the plan cards, for example on our Japan eSIM or Thailand eSIM pages.
When in doubt, choose the middle option: it's usually the best value per GB, and you won't spend your holiday rationing data.
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