Price per GB
Price per GB divides a plan's cost by its data allowance — the single best number for comparing travel eSIM value.
Price per gigabyte is a plan's price divided by its data allowance: a $9 plan with 3 GB costs $3.00/GB. It is the fastest way to compare plans of different sizes fairly.
This entire site ranks plans by real price per GB after coupons, because sticker prices mislead: a cheaper plan with little data is often worse value than a slightly pricier one with triple the allowance.
Caveat: very large "unlimited-style" allowances can make price/GB look absurdly low without being meaningful — which is why our Price Index ranks countries by the cheapest plan with at least 1GB instead of raw price/GB.