Travel data usage calculator
Enter your travel dates, pick what you actually do on your phone, and we'll estimate how much data your trip needs — then match it to a real eSIM plan.
Quick answer: most travelers need 5–8 GB for a one-week trip — light users (maps and messaging only) can get by on 2–3 GB, while daily streaming or video calls push that to 15 GB or more. Use the calculator below for a number matched to your own dates and habits.
How it works
- STEP 1Set your travel datesEnter your departure and return dates, or pick a quick preset like "1 week".
- STEP 2Pick your daily habitsChoose a preset profile or set hours per day for maps, social media, streaming, calls, and browsing.
- STEP 3Get your GB recommendationWe total your usage across the whole trip and add a 20% buffer.
- STEP 4Compare matching eSIM plansPick your destination to see real eSIM plans sized to your estimate, and buy instantly.
How much data common activities use
These are the per-hour rates the calculator above uses — the same numbers published in our full data usage guide.
| Activity | Approximate data use |
|---|---|
| Navigation (Google Maps, Apple Maps) | 8 MB / hour |
| Messaging & email (WhatsApp, iMessage, Gmail) | 3 MB / hour |
| Web browsing (news, shopping) | 40 MB / hour |
| Social media (Instagram, TikTok, X) | 500 MB / hour |
| Music streaming (Spotify, Apple Music) | 100 MB / hour |
| Video calls (FaceTime, Zoom) | 600 MB / hour |
| Video streaming, SD (480p) | 300 MB / hour |
| Video streaming, HD (1080p) | 1.1 GB / hour |
| Video streaming, 4K | 3.5 GB / hour |
Frequently asked questions
How does the travel data calculator work?
You set your departure and return dates and how many hours a day you spend on things like maps, social media, streaming, and video calls. The calculator multiplies each activity by its typical MB-per-hour rate and your trip length, adds a 20% safety buffer, and shows the total in GB — then matches it to real eSIM plans for your destination.
How much data do I need for a week-long trip?
For a typical mix of maps, messaging, some social media, and browsing, 5–8 GB covers a one-week trip comfortably. Heavy streamers or frequent video callers should budget 10–15 GB. Enter your own dates and habits above for a number matched to your actual trip.
Is the Siima travel data calculator free?
Yes, it's free to use with no account or sign-up required. It only asks for a payment method if you choose to buy one of the suggested eSIM plans afterward.
Does the calculator work for any destination?
Yes. Pick any of the 150+ countries Siima sells eSIM plans for and the calculator will show real, currently available plans sized to your estimate.
What if I run out of data mid-trip?
Travel eSIMs simply stop passing data once the plan is used up — no overage charges. You can buy a top-up or a fresh eSIM at any time, so it's worth sizing up slightly if your estimate is close to a plan boundary.
Last updated September 2026.