[Home](./index.md) > [bitburner](./bitburner.md) > [HackingFormulas](./bitburner.hackingformulas.md) > [growThreads](./bitburner.hackingformulas.growthreads.md) ## HackingFormulas.growThreads() method Calculate how many threads it will take to grow server to targetMoney. Starting money is server.moneyAvailable. Note that when simulating the effect of [grow](./bitburner.ns.grow.md), what matters is the state of the server and player when the grow \*finishes\*, not when it is started. The growth amount depends both linearly \*and\* exponentially on threads; see [grow](./bitburner.ns.grow.md) for more details. The inverse of this function is [formulas.hacking.growAmount](./bitburner.hackingformulas.growamount.md), although it can work with fractional threads. **Signature:** ```typescript growThreads(server: Server, player: Person, targetMoney: number, cores?: number): number; ``` ## Parameters

Parameter	Type	Description
server	[Server](./bitburner.server.md)	Server info, typically from [getServer](./bitburner.ns.getserver.md)
player	[Person](./bitburner.person.md)	Player info, typically from [getPlayer](./bitburner.ns.getplayer.md)
targetMoney	number	Desired final money, capped to server's moneyMax
cores	number	_(Optional)_ Number of cores on the computer that will execute grow.

**Returns:** number The calculated grow threads as an integer, rounded up.