If you are a visitor in Kalmar you can buy occasional car park tickets. The fee depends on which parking zone you are located at. If you are a regular commuter, you can instead buy a 30-days ticket. Whichever ticket you choose, you need to respect the maximum parking time at the parking zone. If there are no sign at the parking lot about parking time, the 24-hours rule applies.
Read more about the 24-hours rule (site with google translate)
Please note that as visitor or commuter, you don't need to apply for parking permisson for residents even if the parking lot should be marked as residential parking.
Please note that we have different parking areas and parking zones in Kalmar. Within one parking area there can be several parking zones. If you buy a car park ticket in a red zone at Kvarnholmen (Kalmar City), you can move your car to another parking lot in another red zone at Kvarnholmen within the parking time. But you can not move your car to antoher red zone in another parking area, for exampel Malmen. These rules also applies for motorcycles.
You can see in what parking zone you are at relevant map for the parking area and also at the parking meter and on your car park ticket.