Pass Filter Resonant Frequency

Quick Calculate:

R1 Ω   C1 pF
R2 Ω   C2 pF    

R1(Ω)	C1(pF)	R2(Ω)	C2(pF)	Hz
100000	10	100000	10	159.15 KHz
100000	15	100000	15	106.1 KHz
100000	22	100000	22	72.34 KHz
100000	33	100000	33	48.23 KHz
100000	47	100000	47	33.86 KHz
100000	100	100000	100	15.92 KHz
100000	120	100000	120	13.26 KHz
100000	130	100000	130	12.24 KHz
100000	150	100000	150	10.61 KHz
100000	180	100000	180	8.84 KHz
100000	220	100000	220	7.23 KHz
100000	330	100000	330	4.82 KHz
100000	470	100000	470	3.39 KHz
100000	560	100000	560	2.84 KHz
100000	680	100000	680	2.34 KHz
100000	750	100000	750	2.12 KHz
100000	820	100000	820	1.94 KHz
100000	1000	100000	1000	1.59 KHz
100000	1500	100000	1500	1.06 KHz
100000	2000	100000	2000	795.77 Hz
100000	2200	100000	2200	723.43 Hz
100000	3300	100000	3300	482.29 Hz
100000	4700	100000	4700	338.63 Hz
100000	5000	100000	5000	318.31 Hz
100000	5600	100000	5600	284.21 Hz
100000	6800	100000	6800	234.05 Hz
100000	10000	100000	10000	159.15 Hz
100000	15000	100000	15000	106.1 Hz
100000	22000	100000	22000	72.34 Hz
100000	33000	100000	33000	48.23 Hz
100000	47000	100000	47000	33.86 Hz
100000	68000	100000	68000	23.41 Hz
100000	100000	100000	100000	15.92 Hz
100000	150000	100000	150000	10.61 Hz
100000	200000	100000	200000	7.96 Hz
100000	220000	100000	220000	7.23 Hz
100000	330000	100000	330000	4.82 Hz
100000	470000	100000	470000	3.39 Hz
100000	680000	100000	680000	2.34 Hz
100000	1000000	100000	1000000	1.59 Hz
100000	1500000	100000	1500000	1.06 Hz
100000	2000000	100000	2000000	0.8 Hz
100000	2200000	100000	2200000	0.72 Hz
100000	3300000	100000	3300000	0.48 Hz

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The above table can be used for first Order any Order Pass filter 
Based on

f = 1 / 2π√(R1*C1*R2*C2)

if C1 = C2 and R1 = R2

f = 1 / 2πRC

Let's take an example of a Low Pass filter, let's say values are
R1 = 1000000 Ω
R2 = 1000000 Ω
C1 = 100000 pF
C2 = 100000 pF
Then cut-off frequency would be 15.92 Hz.

The roll-off behavior for high frequency would be

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For additional information on all standard Ceramic Capacitor Codes.

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