Tight
14.4GB
Enough if Wi-Fi is reliable; expect rationing late in the trip.
How much eSIM data do I need?
Tell us roughly how you'll use your phone abroad and we'll size the plan in seconds. Three bands, no email gate, no signup.
Your data recommendations
Comfortable
17.9GB
Recommended. Covers daily activities with a small margin.
Stress-free
28.7GB
Generous buffer. Heavy social and video without checking usage.
How it works
We multiply each activity by an industry-average data rate (HD video at 3 GB/hour, social media at 600 MB/hour, etc.), subtract a share for Wi-Fi offload, and scale by trip length. Three bands cover most planning styles: Tight is the minimum to get by, Comfortable is the recommended sweet spot, and Stress-free leaves a generous buffer for heavy social and video days.
The country picker pre-fills Wi-Fi availability based on what travellers usually report: Japan and Singapore are high, the US is medium, Morocco is low. You can override it the moment your itinerary differs (think: rural road trip, all-inclusive resort with weak Wi-Fi).
Accuracy
Rates are 2026 averages from public consumption studies and our own measurements; they get within ±20% for typical travellers. If your video is mostly 4K or you tether a laptop, lean toward Stress-free. If you barely use mobile data at home, Tight is probably fine.
Frequently asked questions
- Is 5 GB enough for a one-week trip?
- For most travellers with decent Wi-Fi at the hotel, 5 GB covers a week of maps, social media, and the occasional video. Heavy streamers should plan for 10 GB+ — try the calculator with your real habits.
- How does Wi-Fi availability change the recommendation?
- High Wi-Fi offloads roughly 60% of usage onto free networks (cafés, hotels, airports), so cellular needs drop sharply. Low Wi-Fi assumes you're on cellular ~80% of the time — common for road trips and remote destinations.
- Why are the GB numbers different from what my provider sells?
- We size by activity, not by marketing bundle. Providers commonly sell 1, 3, 5, 10, 20 GB tiers — round up to the nearest one that meets your Comfortable band. Most eSIM providers let you top up mid-trip if you run low.
- Does the calculator save my inputs?
- No. It runs entirely in your browser. We don't store inputs, results, or country selection — there is nothing to sync, leak, or sell.