Start with your habits, not the biggest bundle.
Use the mobile-data screen on your phone to inspect your recent usage. Separate navigation and messages from video, cloud backups and laptop tethering. Your own usage is a better starting point than a universal number of GB per traveller.
Multiply your usual daily allowance by all travel days, then add room for heavier days. Download entertainment and maps over Wi-Fi beforehand. In our calculator, estimates are planning inputs, not measurements or guarantees.
Match both the data allowance and validity. For unlimited plans, inspect daily high-speed limits and hotspot rules. A smaller allowance with a suitable top-up may fit better, but confirm the top-up price and whether it extends validity before relying on it.
Esimufo editorial · reviewed 2026-10-17. Check your chosen plan’s conditions.