Choosing a data size that matches how you travel
The right number follows your habits, not the length of the trip.
Author: eSIMonline Editorial · eSIMonline editorial teamPublished: September 5, 2026Last updated: September 5, 2026
Quick answer
- Ask how much video streaming and video calling you will do: those two decide almost the whole number.
- When unsure, take a mid-size plan that can be topped up rather than over-buying upfront.
How many gigabytes cannot be answered from the number of days alone. Two travellers on the same seven-day trip can differ several times over. Behaviour decides it, not duration.
Travel styles and their data profile
| Style | Usage profile | How to choose |
|---|---|---|
| City sightseeing | Maps, search and messaging | Small to mid usually suffices |
| Posting photos and video daily | Large daily uploads | Large, or top-up capable |
| Working while travelling | Video meetings and work files | Large, and check the full-speed cap |
| Family travel sharing a hotspot | Several devices on one plan | Scale with the number of devices |
A quick way to estimate
- Check your normal daily usage from the phone's counter
- Add for the extra maps and search you use in an unfamiliar place
- Subtract what will happen on accommodation Wi-Fi
- Multiply by the days, then add roughly a quarter for the unplanned
Buying smaller and topping up usually costs less than buying a large margin, provided the plan supports top-ups. Check that before you buy.
FAQ
Is unused data wasted?+
Plans are sold as a package of volume and validity, and the remainder is generally not refunded. Size closer to reality and top up if needed.
Is unlimited better value?+
It depends on your habits. Heavy daily use can justify it, but always check the full-speed cap, since the experience past it differs considerably.