# How is the APY calculated?

The formula to calculate the fixed rate upfront yield percentage is based on the inputs the user chooses when interfacing with the Flashstake dapp.

### Formula

APR = (return \* 31536000) / (deposit \* stakeDurationSeconds)

### Math Example

Given that a user chooses to Flashstake 10 stETH for 180 days and is set to receive 0.45 wstETH as the upfront yield amount, and if 1 stETH is worth exactly $2,000 then the display may read something like:

> Stake 10 stETH ($20,000) for 180 days and instantly receive at least 0.45 wstETH ($900) at 9.125% APR

APR = (900 \* 31536000) / (20,000 \* 15,552,000) = 9.125%