eSIM cost calculator: what does a gigabyte really cost?
Travel eSIM pricing is deliberately hard to compare: every provider sells a different amount of data over a different validity period, so the sticker price tells you almost nothing. The only fair number is price per gigabyte. Type a plan price and the data it includes below, or tap a preset, and the calculator does the rest, including an optional price per day when you add the validity window.
Around $3.20 per GB is fair for the coverage most big names offer. Solid, but a bigger bundle is often cheaper per GB if you can finish it.
Pick on price per GB for your destination, and watch whether unused data expires. Bigger bundles are usually cheaper per GB, but only a deal if you finish them.
How to read the result
Price per GB is simply the plan price divided by the gigabytes you get. On the same 5 GB / 30-day Europe benchmark we use across the site, the cheapest fixed bundles land near $3 per GB (Saily at about $3.00, Nomad at about $3.40), while the best-known name, Airalo, sits around $3.90 for the widest coverage. Anything under $3.50 per GB is a strong price; $3.50 to $4.50 is fair for solid coverage; above that you are paying a premium that only makes sense for special cases like cruise plans, remote regions, or data that never expires.
One honest catch the price per GB hides: a bigger bundle is almost always cheaper per gigabyte, but it is only a real deal if you actually finish it before the validity window closes. Buying 20 GB you will never use is not cheaper than buying 5 GB you will. So pick on price per GB for your destination, size the bundle to a realistic estimate of your trip (most travelers burn 300 to 500 MB a day), and watch whether unused data simply expires. Pay-as-you-go and free options exist too when your usage is hard to predict.