GVB day card starting at € 7.50
If you want to have a fun day out in Amsterdam and do not have a OV-chipkaart then the GVB day card is the cheapest option.
The GVB day or multi-day card allows you to travel at the hours of your own convenience without any limitation throughout Amsterdam, day and night, on the bus, tram, and metro. The day card is valid for 24 hours after you first check in.

For more information about the GVB day and multi-day cards, click here