[Home](./index.md) > [bitburner](./bitburner.md) > [Hacknet](./bitburner.hacknet.md) > [hashCost](./bitburner.hacknet.hashcost.md) ## Hacknet.hashCost() method Get the cost of a hash upgrade. **Signature:** ```typescript hashCost(upgName: HacknetServerHashUpgrade, count?: number): number; ``` ## Parameters

Parameter	Type	Description
upgName	[HacknetServerHashUpgrade](./bitburner.hacknetserverhashupgrade.md)	Name of the upgrade using hash of Hacknet Server.
count	number	_(Optional)_ Number of upgrades to buy at once. Defaults to 1 if not specified.

**Returns:** number Number of hashes required for the specified upgrade. ## Remarks RAM cost: 0.5 GB This function is only applicable for Hacknet Servers (the upgraded version of a Hacknet Node). Returns the number of hashes required for the specified upgrade. The name of the upgrade must be an exact match. ## Example ```js const upgradeName = "Sell for Corporation Funds"; if (ns.hacknet.numHashes() > ns.hacknet.hashCost(upgradeName)) { ns.hacknet.spendHashes(upgradeName); } ```