Data math
What uses the most travel eSIM data?
Video calls, HD streaming, short video apps, hotspot, and cloud work are usually the biggest data drivers. Maps and messaging are light, but they matter when you rely on them every day abroad.
| Activity | MB/hour | 1GB lasts about |
|---|---|---|
| Email and messaging | 10 | 102 hours |
| Voice calls / WhatsApp calls | 30 | 34 hours |
| Video calls | 800 | 1 hours |
| Social browsing | 150 | 7 hours |
| Reels / TikTok / Stories | 500 | 2 hours |
| Music streaming | 75 | 14 hours |
| Video SD / 480p | 700 | 1 hours |
| Video HD / 4K | 2500 | 1 hours |
| Google Maps / navigation | 20 | 51 hours |
| Web browsing | 60 | 17 hours |
| Remote work / cloud apps | 400 | 3 hours |
Download offline maps before departure.
Use WiFi for app updates, backups, and large downloads.
Turn off video autoplay in social apps.
Lower streaming quality when using mobile data.
Check hotspot and fair-use notes before buying.
Calculator FAQ
Common travel eSIM data questions
How much eSIM data do I need for a one week trip?
Most travelers are comfortable with 5GB to 10GB for one week if they use maps, messaging, social apps, and light video. Heavy video, hotspot, or remote work can push the recommendation to 20GB or more.
Does the estimate include a buffer?
Yes. The calculator adds a 20% safety buffer before rounding to common eSIM plan sizes, because airport delays, navigation, ride apps, and weak hotel WiFi can increase mobile data usage.
When should I choose unlimited data?
Unlimited can make sense for heavy video, frequent hotspot use, or remote work. Always check fair-use and throttling notes before buying, because many unlimited eSIM plans slow down after a daily allowance.
Can I compare plans after calculating data?
Yes. The comparison button opens the selected country page with the recommended minimum data filter already applied.