# calculating the stop-band edge frequency of a low-pass FIR

I have three information about a low-pass FIR filter.

• pass-band edge frequency
• pass-band ripple
• stop-band ripple

I want to get the stop-band edge frequency I've been googling for the last hour to find a formula to get, but without success . can any tell me how can I calculate it if have those 3 values ? thanks in advance