<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [bitburner](./bitburner.md) > [HacknetServersFormulas](./bitburner.hacknetserversformulas.md) > [ramUpgradeCost](./bitburner.hacknetserversformulas.ramupgradecost.md) ## HacknetServersFormulas.ramUpgradeCost() method Calculate cost of upgrading hacknet server ram. **Signature:** ```typescript ramUpgradeCost(startingRam: number, extraLevels?: number, costMult?: number): number; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | startingRam | number | starting ram | | extraLevels | number | _(Optional)_ amount of level of ram to purchase (defaults to 1) | | costMult | number | _(Optional)_ player cost reduction (default to 1) | **Returns:** number The calculated cost.