This calculator will tell you the required portal level and combination of resonators that are needed to reach a specified destination with a certain number of players.
To use the calculator, select a player count and the distance between your portals below in kilometers. Then click the calculate button.
The results below will include the minimum necessary portal level to reach that distance, the minimum necessary resonator sum ( sum of resonator level x resonators @ level), and sample portal build using the lowest possible resonator levels with the specified number of players.