Work out metro fare instantly with clear inputs, formula shown and shareable results.
Zonal fares are a base for the first zone plus an increment for each additional one. Daily capping then limits total spending regardless of journey count, which is why tapping in and out with a contactless card usually beats buying individual tickets.
Metro fare
single = base fare + (zones - 1) x per-zone increment; daily cost = min(singles, daily cap)
The system totals your journeys and charges no more than the cap for the day or week. It requires consistent use of the same card.
Only if you travel more days than the weekly cap divided by the daily cap. Capping has made most short-term travelcards redundant.