Estimate how much mobile data you may need for an international trip based on trip length and typical travel usage such as maps, messaging, browsing, video, calls, and hotspot use.
Set your trip length, pick the usage profile that matches your habits, and adjust the individual activities if your days look different from the preset. The calculator turns daily minutes of each activity into a total for the trip and then rounds up to the nearest package size that providers actually sell.
Estimate the activities you will do on mobile data specifically. Anything you do on hotel or café Wi-Fi — large downloads, photo backups, a film for the evening — should be left out, which is often the difference between a 3 GB and a 10 GB plan.
Approximate figures for planning. Real usage varies with app settings, video quality, and signal strength, and streaming quality is by far the largest variable.
| Activity | Approximate data use |
|---|---|
| Turn-by-turn navigation | 5–10 MB per hour |
| Messaging (text, no media) | Under 1 MB per hour |
| Social feeds with images | 30–100 MB per hour |
| Web browsing | 10–25 MB per hour |
| Music streaming | 40–80 MB per hour |
| Video streaming (standard definition) | 300–700 MB per hour |
| Video streaming (high definition) | 1.5–3 GB per hour |
| Video calls | 250–900 MB per hour |
| Photo backup to cloud | 2–5 MB per photo |
| Laptop hotspot, general use | 100–300 MB per hour |
Three profiles cover most travelers. Find the one that matches your day and multiply by your trip length for a first estimate.
Starting points based on the profiles above. Providers usually allow a mid-trip top-up, so there is little penalty for starting one size down.
| Trip length | Suggested data (light / normal / heavy) |
|---|---|
| 1 day | 0.5 GB / 1 GB / 3 GB |
| 3 days | 1 GB / 3 GB / 10 GB |
| 7 days | 2 GB / 5 GB / 20 GB |
| 14 days | 3 GB / 10 GB / unlimited |
| 30 days | 5 GB / 20 GB / unlimited |
These are complementary rather than competing choices, and many travelers use all three on one trip.
Check your usage after the first two days. If you are tracking well above your daily average, topping up is normally cheaper than being cut off and falling back to carrier roaming rates.
Buy more up front if you will be tethering a laptop, working remotely, sharing a connection with travel companions, or spending long stretches away from Wi-Fi. Those four situations account for most cases of running out early.
Most travelers use roughly 300–700 MB per day for maps, messaging, and light browsing, so a week often lands around 3–5 GB. Streaming video, video calls, and hotspot use can raise that quickly — set your daily habits in the calculator for a personal estimate.
5 GB is comfortable for about a week of maps, messaging, and browsing without heavy streaming. If you plan to stream video, tether a laptop, or make frequent video calls, estimate those separately, as they use far more data.
Turn-by-turn navigation uses roughly 5–10 MB per hour, and downloading offline maps ahead of time reduces that further. Maps is rarely the main driver of data use — video and photo backups usually are.
A travel eSIM is usually the cheapest flexible option for data, carrier roaming is simplest but often costs more, and hotel or café Wi-Fi is best for large downloads and backups. Many travelers combine an eSIM for daily use with Wi-Fi for heavy tasks.