Compare what the same data costs at home versus roaming.
Multiplying data used by each rate computes what the same usage costs on a domestic plan versus roaming. Roaming surcharges are often several times the home rate, so the gap makes the value of a travel plan concrete.
Roaming Cost
Roaming = data used x roaming rate; extra = roaming - domestic
Roaming = data used x roaming rate; extra = roaming - domestic Multiplying data used by each rate computes what the same usage costs on a domestic plan versus roaming.
Roaming surcharges are often several times the home rate, so the gap makes the value of a travel plan concrete.
This calculator takes 3 inputs: Data used, Home rate, Roaming rate. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.