[Home](./index.md) > [bitburner](./bitburner.md) > [HacknetNodesFormulas](./bitburner.hacknetnodesformulas.md) > [ramUpgradeCost](./bitburner.hacknetnodesformulas.ramupgradecost.md) ## HacknetNodesFormulas.ramUpgradeCost() method Signature: ```typescript ramUpgradeCost(startingRam: number, extraLevels?: number, costMult?: number): number; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | startingRam | number | | | extraLevels | number | | | costMult | number | | Returns: number