Free tool
Estimate what data roaming could cost on your next trip using your carrier's own rate, and compare it with a live travel eSIM price for your destination.
We don't have a plan that covers this much data for 7 days in Japan. Try a shorter trip or less data, or see all plans.
Prices are estimates and may vary by carrier, plan, destination and usage. Roaming costs use the rate entered above; eSIM prices come from our live catalogue.
Enter your carrier's daily pass or price per GB. An example rate is filled in until you change it, and it's labelled as an example.
We find the cheapest plan in our catalogue that covers your data and your number of days in that destination.
If your home country and destination are both in the EU/EEA, your plan probably includes roaming, and we'll point that out.
Not sure how much data you'll use? Try the data usage calculator.
Tick off each step as you go. Your progress is saved in this browser.
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Find out whether your plan includes your destination, and whether it charges per day, per megabyte or not at all.
How roaming charges work →Work out what a typical day would cost at your carrier's rate before you rely on it.
Roaming cost calculator →Save maps for each city and route so navigation keeps working without signal.
Keep tickets, bookings, insurance and a copy of your passport on your phone.
Make sure your phone supports eSIM and is unlocked if you plan to use one.
How to install an eSIM →Compare a data plan for your destination with your carrier's roaming price.
Browse destinations →Set app and system updates to Wi-Fi only so they don't use mobile data.
Turn off mobile data for photo backups, cloud sync and apps you won't need.
Planning mobile data abroad →Save playlists, podcasts and shows before you leave so streaming doesn't eat your data.
It's an estimate. The roaming side uses the rate you enter, so it's only as accurate as that rate, and any taxes or fees your carrier adds aren't included. Travel eSIM prices come from our live catalogue.
On your carrier's website or app, usually in a section about international or travel use. Look for a daily pass price, or a price per megabyte or gigabyte, for your destination.
Multiply the price per MB by 1,024 to get the price per GB, then choose "Price per GB" in the calculator.
For SIMs from EU and EEA countries, roaming within the EU/EEA is usually charged at home rates, subject to fair-use limits. Choose "Included in my plan" if that applies to you. See international data roaming for details.
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