TripCalceSIM guide
How much data do I need in Japan or Europe?
Quick answers by trip length and how you use your phone.
| Usage | 7 days | 10 days | 14 days | 21 days |
|---|---|---|---|---|
| Light (maps + messaging) ~0.2 GB/day | 1.1 GB buy 3 GB | 1.6 GB buy 3 GB | 2.2 GB buy 3 GB | 3.3 GB buy 5 GB |
| Typical (+1 hr social) ~0.7 GB/day | 4.6 GB buy 5 GB | 6.5 GB buy 10 GB | 9.2 GB buy 10 GB | 13.7 GB buy 20 GB |
| Heavy (+2 hr social, 1 hr SD video) ~2.0 GB/day | 13.9 GB buy 20 GB | 19.9 GB buy 20 GB | 27.9 GB buy 50 GB | 41.8 GB buy 50 GB |
These are estimates based on typical app data use, plus a 20% buffer, and assume no hotel Wi-Fi. Your real use depends on your apps and settings. For a custom number, use the eSIM data calculator.
Japan tips
- You'll use maps a lot for trains and walking, so offline maps save data.
- Pocket Wi-Fi rentals are common, but an eSIM is easier if your phone supports it.
Europe tips
- Multi-country Europe eSIMs cover many countries on one plan, so check that every country on your trip is included.
- If you're from the EU, your home plan may already include roaming.
Before you buy: make sure your phone is unlocked and supports eSIM.
Compare Japan & Europe eSIMs
Pick the plan size from the table above.
Compare Japan & Europe eSIMs →Affiliate linkPick the plan size from the table above.