[Home](./index.md) > [bitburner](./bitburner.md) > [HacknetServersFormulas](./bitburner.hacknetserversformulas.md) > [hashUpgradeCost](./bitburner.hacknetserversformulas.hashupgradecost.md) ## HacknetServersFormulas.hashUpgradeCost() method Calculate hash cost of an upgrade. **Signature:** ```typescript hashUpgradeCost(upgName: HacknetServerHashUpgrade, level: number): number; ``` ## Parameters

Parameter	Type	Description
upgName	[HacknetServerHashUpgrade](./bitburner.hacknetserverhashupgrade.md)	name of the upgrade
level	number	level of the upgrade

**Returns:** number The calculated hash cost.