Frequency's for the 555 running in Astable mode

Supply Voltage (Vs) in the range 4.5 to 15V   (18V absolute maximum!)
5V to 9V is pretty standard...

3ms (0.032) @ 50.76% Duty Cycle  

R1 - 68K
R2 - 2.2M
C1 - 10uF

---

5ms (0.049) @ 92.52% Duty Cycle  

R1 - 250K
R2 - 22K
C1 - 100uF

---

5ms (0.0479) @ 50.02% Duty Cycle  #2

R1 - 1K
R2 - 1M
C1 - 15uF

---

8ms (0.076) @ 92.11% Duty Cycle   

R1 - 160K
R2 - 15K
C1 - 100uF

---

8ms (0.08) @ 91.66% Duty Cycle   

R1 - 1M
R2 - 100K
C1 - 15uF

---

0.14Hz (0.146) @ 52.38% Duty Cycle

R1 - 10K
R2 - 100K
C1 - 47uF

---

0.15Hz (0.148) @ 50.25% Duty Cycle

R1 - 22K
R2 - 2.2M
C1 - 2.2uF

---

0.21Hz (0.255) @ 91.67% Duty Cycle

R1 - 100K
R2 - 10K
C1 - 47uF

---

0.31Hz (0.312) @ 52.38% Duty Cycle  #1

R1 - 10K
R2 - 100K
C1 - 22uF

---

0.32Hz (0.32) @ 51.11% Duty Cycle  #2

R1 - 1K
R2 - 22K
C1 - 100uF

---

0.33Hz (0.3256) @ 50.25% Duty Cycle  #3

R1 - 1K
R2 - 100K
C1 - 22uF

---

0.5Hz (0.4799) @ 66.66% Duty Cycle    #1

R1 - 100K
R2 - 100K
C1 - 10uF

---

0.5Hz (0.481) @ 66.67% Duty Cycle     #2   

R1 - 100K
R2 - 1K
C1 - 22uF

---

0.8Hz (0.825) @ 51.61% Duty Cycle     #1      

R1 - 12K
R2 - 180K
C1 - 4.7uF

---

0.8Hz (0.82) @ 98.70% Duty Cycle     #2     

R1 - 750K
R2 - 10K
C1 - 2.2uF

---

0.9Hz (0.94601) @ 99.96% Duty Cycle

R1 - 390K
R2 - 150Ω
C1 - 3.9uF

---

1Hz (0.9999) @ 50.00% Duty Cycle  #1

R1 - 47Ω
R2 - 720K
C1 - 1uF

---

1Hz (0.9883) @ 51.61% Duty Cycle  #2

R1 - 1K
R2 - 15K
C1 - 47uF

---

1Hz (1.023) @ 66.67 % Duty Cycle  #3

R1 - 10K
R2 - 10K
C1 - 47uF

---

1Hz (1.1338) @ 62.99% Duty Cycle  #3

R1 - 33K
R2 - 47K
C1 - 10uF

---

1.3Hz (1.285) @ 58.16% Duty Cycle

R1 - 3.9K
R2 - 10K
C1 - 47uF

---

1.5Hz (1.515) @ 50.53% Duty Cycle  #1

R1 - 10K
R2 - 470K
C1 - 1uF

---

1.5Hz (1.4589) @ 50.53% Duty Cycle  #2

R1 - 10K
R2 - 100K
C1 - 4.7uF

---

1.5Hz (1.533) @ 50.05% Duty Cycle  #3

R1 - 1K
R2 - 470K
C1 - 1uF

---

2Hz (1.9998) @ 50.00% Duty Cycle  #1

R1 - 47Ω
R2 - 360K
C1 - 1uF

---

2Hz (1.978) @ 54.67% Duty Cycle  #2

R1 - 6.8K
R2 - 33K
C1 - 10uF

---

2Hz (1.9999) @ 75% Duty Cycle  #3

R1 - 36K
R2 - 18K
C1 - 10uF

---

2Hz (2) @ 66.66% Duty Cycle  #4

R1 - 240K
R2 - 240K
C1 - 1uF

---

2.5Hz (2.488) @ 65.52% Duty Cycle  +

R1 - 18K
R2 - 20K
C1 - 0.01uF

---

2.8Hz (2.787) @ 99.45% Duty Cycle 

R1 - 180K
R2 - 1K
C1 - 22uF

---

3Hz (2.915) @ 66.67% Duty Cycle     #1

R1 - 33K
R2 - 33K
C1 - 5uF

---

3Hz (3.101) @ 66.67% Duty Cycle     #2 

R1 - 33K
R2 - 33K
C1 - 4.7uF

---

3Hz (3.123) @ 52.38% Duty Cycle     #3

R1 - 10K
R2 - 100K
C1 - 2.2uF

---

3.2Hz (3.207) @ 51.11% Duty Cycle   

R1 - 10K
R2 - 220K
C1 - 1uF

---

4Hz  @ 66.67% Duty Cycle

R1 - 120K
R2 - 120K
C1 - 1uF

---

4.8Hz  @ 66.66% Duty Cycle

R1 - 100K
R2 - 100K
C1 - 1uF

---

5Hz (4.799) @ 66.66% Duty Cycle

R1 - 1M
R2 - 1M
C1 - 0.1uF

---

7.4Hz (7.42) @ 75.77% Duty Cycle (use a POT for R1 to adjust to a different Freq.)

R1 - 10K   POT
R2 - 4.7K
C1 - 10uF

---

8.5Hz (8.57) @ 66.66% Duty Cycle

R1 - 1M
R2 - 1M
C1 - .056uF

---

10Hz (10.078) @ 63.82% Duty Cycle  #1

R1 - 84K
R2 - 110K
C1 - .47uF

---

10Hz (10.145) @ 63.58% Duty Cycle  #2

R1 - 82K
R2 - 110K
C1 - .47uF

---

10Hz (10.2127) @ 66.66% Duty Cycle  #3

R1 - 47K
R2 - 47K
C1 - 1uF

---

10Hz (9.59) @ 68.66% Duty Cycle  #4

R1 - 5.6K
R2 - 4.7K
C1 - 10uF

---

10Hz (10.234) @ 66.67% Duty Cycle  #5

R1 - 4.7K
R2 - 4.7K
C1 - 10uF

---

13Hz (13.118) @ 50,50% Duty Cycle

R1 - 10K
R2 - 50K
C1 - 1uF

---

14Hz (13.87) @ 99.79% Duty Cycle  

R1 - 47K
R2 - 100
C1 - 2.2uF

---

15Hz (14.997) @ 50.01% Duty Cycle

R1 - 100Ω
R2 - 320K
C1 - .15uF

---

17Hz (117.35) @ 90.96% Duty Cycle  

R1 - 680K
R2 - 75K
C1 - .1uF

---

20Hz (19.99) @ 50.00% Duty Cycle

R1 - 10Ω
R2 - 360K
C1 - .1uF

---

27Hz (27.170) @ 81.13% Duty Cycle 

R1 - 330K
R2 - 100K
C1 - .1uF

---

31Hz (31.17) @ 53.38% Duty Cycle 

R1 - 1K
R2 - 10K
C1 - 2.2uF

---

50Hz (50) @ 64.58% Duty Cycle   (Line Power Frequency - EU)

R1 - 56K
R2 - 68K
C1 - .15uF

---

55Hz (54.54) @ 91.67% Duty Cycle  

R1 - 100K
R2 - 10K
C1 - .22uF

---

60Hz (60) @57.5% Duty Cycle   (Line Power Frequency - US) 

R1 - 24K
R2 - 68K
C1 - .15uF

---

62Hz (61.75) @55.66% Duty Cycle

R1 - 120Ω
R2 - 470Ω
C1 - 22uF

---

68Hz (68.57) @52.38% Duty Cycle   #1

R1 - 100K
R2 - 1M
C1 - .01uF

---

68Hz (68.76) @52.38% Duty Cycle   #2

R1 - 1K
R2 - 10K
C1 - .001uF

---

75Hz (75.28) @55.77% Duty Cycle

R1 - 4.7K
R2 - 18K
C1 - .47uF

---

80Hz (80.81) @66.66% Duty Cycle

R1 - 18K
R2 - 18K
C1 - .33uF

---

100Hz (98.63) @ 53.42% Duty Cycle  #1

R1 - 1K
R2 - 6.8K
C1 - 1uF

---

100Hz (101.05) @ 50.53% Duty Cycle  #2

R1 - 1K
R2 - 47K
C1 - .15uF

---

102Hz (102.055) @ 51.81% Duty Cycle

R1 - 5.1K
R2 - 68K
C1 - .1uF

---

120Hz (120) @ 65.83% Duty Cycle  #1

R1 - 76K
R2 - 82K
C1 - .05uF

---

120Hz (120) @ 91.66% Duty Cycle  #2

R1 - 1M
R2 - 100K
C1 - .01uF

---

136Hz (135.85) @ 92.92% Duty Cycle   

R1 - 91K
R2 - 7.5K
C1 - .1uF

---

151.58Hz  @ 50.53% Duty Cycle

R1 - 1K
R2 - 47K
C1 - .1uF

---

180Hz  @ 62.5% Duty Cycle

R1 - 100K
R2 - 150K
C1 - .02uF

---

200Hz (201.12) @ 53.91% Duty Cycle

R1 - 5.6K
R2 - 33K
C1 - .1uF

---

217Hz (216.64) @ 50.35% Duty Cycle

R1 - 4.7K
R2 - 330K
C1 - .01uF

---

240Hz (240) @ 91.67% Duty Cycle  

R1 - 100K
R2 - 10K
C1 - .05uF

---

350Hz (350.19) @ 51.36%  [ CW ]

R1 - 5.6K
R2 - 100K
C1 - .02uF

---

400Hz (399.7) @ 50.14% Duty Cycle  #1

R1 - 1K
R2 - 180K
C1 - .015uF

---

400Hz (400) @ 65.83% Duty Cycle  #2

R1 - 76K
R2 - 82K
C1 - .015uF

---

480Hz (400) @ 66.67% Duty Cycle

R1 - 100K
R2 - 100K
C1 - .01uF

---

500Hz (499.99) @ 54.70% Duty Cycle  #1

R1 - 2.2K
R2 - 13.3K
C1 - .1uF

---

500Hz (501.74) @ 54.70% Duty Cycle  #2

R1 - 27K
R2 - 130K
C1 - .01uF

---

540Hz (540.36) @ 52.38% Duty Cycle

R1 - 27K
R2 - 270K
C1 - .0047uF

---

550Hz (550.06) @ 51.53% Duty Cycle

R1 - 17K
R2 - 270K
C1 - .0047uF

---

560Hz (559.50) @ 50.69% Duty Cycle

R1 - 7.6K
R2 - 270K
C1 - .0047uF

---

600Hz (600.50) @ 68.81% Duty Cycle

R1 - 10K
R2 - 100K
C1 - .01uF

---

687Hz (686.82) @ 50.79% Duty Cycle  #1    

R1 - 1.5K
R2 - 47K
C1 - 22 nf

---

687Hz (687.14) @ 52.38% Duty Cycle  #2 

R1 - 82K
R2 - 68K
C1 - .011uF

---

700Hz (685.39) @ 50.78% Duty Cycle

R1 - 1.5K
R2 - 47K
C1 - .022uF

---

1KHz (1002.79) @ 52.65% Duty Cycle

R1 - 76K
R2 - 680K
C1 - .001uF

---

1KHz (1021.28) @ 66.66% Duty Cycle

R1 - 470K
R2 - 470K
C1 - .001uF

---

1.2KHz (1199.99) @ 60.83% Duty Cycle

R1 - 260K
R2 - 470K
C1 - .001uF

---

1.2KHz (1202.00) @ 60.77% Duty Cycle  #1

R1 - 258K
R2 - 470K
C1 - .001uF

---

1.2KHz (1199.99) @ 91.67% (Duty Cycle, not a good choice)  #2

R1 - 10K
R2 - 1K
C1 - .1uF

---

1.5KHz (1515.79) @ 50.53% Duty Cycle   #1

R1 - 1K
R2 - 47K
C1 - .01uF

---

1.5KHz (1515.79) @ 76.84% Duty Cycle   #2

R1 - 51K
R2 - 22K
C1 - .01uF

---

1.8KHz (1799.99) @ 58.75% Duty Cycle  (Center of Telephone Audio)

R1 - 140K
R2 - 330K
C1 - .001uF

---

2KHz (1999.99) @54.17% Duty Cycle  #1

R1 - 60K
R2 - 330K
C1 - .001uF

---

2KHz (2004) @72.22% Duty Cycle  #2

R1 - 32K
R2 - 20K
C1 - .01uF

---

2KHz (2036.78) @53.32% Duty Cycle  #3

R1 - 4.7K
R2 - 33K
C1 - .01uF

---

2KHz (2149.25) @50.75% Duty Cycle  #4

R1 - 1K
R2 - 33K
C1 - .01uF

---

2.3KHz (2335.99) @98.18% Duty Cycle 
R1 - 27K
R2 - 510Ω
C1 - .022uF

---

2.6KHz (2600) @56.76% Duty Cycle  (Blue Tone)

R1 - 75K
R2 - 240K
C1 - .001uF

---

2.7KHz (2701.69) @54.97% Duty Cycle

R1 - 53K
R2 - 240K
C1 - .001uF

---

3.2KHz (3199.99) @ 56.67% Duty Cycle - (Voltage Inverter)

R1 - 1.2K
R2 - 3.9K
C1 - .05uF

---

3.2KHz (3.207) @ 51.11% Duty Cycle - (Voltage Inverter)

R1 - 1K
R2 - 22K
C1 - .01uF

---

4KHz (3999.99) @ 58.33% Duty Cycle

R1 - 60K
R2 - 150K
C1 - .001uF

---

4.5KHz (4472.05) @ 53.42% Duty Cycle - (Voltage Doubler)

R1 - 2.2K
R2 - 15K
C1 - .01uF

---

4.8KHz (4799.99) @ 60% Duty Cycle   (Inverter Frequency)  #1

R1 - 60K
R2 - 120K
C1 - .001uF

---

4.8KHz (4799.99) @ 67% Duty Cycle   (Inverter Frequency)  #2

R1 - 1K
R2 - 1K
C1 - .1uF

---

4.9KHz (4848.48) @ 94.44% Duty Cycle   (Inverter Frequency)

R1 - 24K
R2 - 1.5K
C1 - 1uF

---

5KHz (5034.97) @ 67.48% Duty Cycle   (Inverter Frequency)

R1 - 1K
R2 - 930Ω
C1 - .1uF

---

7KHz (6889.66) @ 50.53% Duty Cycle

R1 - 4.7K
R2 - 220K
C1 - 470pF

---

7.2KHz (7199.99) @ 64% Duty Cycle

R1 - 560K
R2 - 720K
C1 - 100pF

---

9.2KHz (9230.77) @ 56.41% Duty Cycle  -  (IR Repeater)

R1 - 2K
R2 - 6.8K
C1 - .01uF

---

10KHz (9986.13) @ 52.84% Duty Cycle

R1 - 8.2K
R2 - 68K
C1 - .001uF

---

11.6KHz (11612.90) @ 59.68% Duty Cycle

R1 - 2,4K
R2 - 5K
C1 - .01uF

---

12KHz  @ 60% Duty Cycle

R1 - 24K
R2 - 48K
C1 - .001uF

---

12.5KHz  @ 59.38% Duty Cycle

R1 - 1.8K
R2 - 3.9K
C1 - .012uF

---

14KHz (14007.78) @ 53.31% Duty Cycle

R1 - 6.8K
R2 - 48K
C1 - .001uF

---

15KHz (142999) @ 64.25% Duty Cycle

R1 - 287Ω  1%
R2 - 360Ω
C1 - .01uF

---

15KHz (15031.32) @ 50.94% Duty Cycle   (Inverter Frequency, driving a Darlinton)

R1 - 180K
R2 - 4.7K
C1 - .01uF

---

19KHz (18.987) @ 56.58% Duty Cycle    (Wireless Power Supply Transmitter)

R1 - 1K
R2 - 3.3K
C1 - .1uF

---

31KHz (31168.83) @ 52.38% Duty Cycle   (Drive a Nixie Tube)

R1 - 1K
R2 - 10K
C1 - .0022uF

---

40KHz @ 61.11% Duty Cycle

R1 - 8K
R2 - 14K
C1 - .001uF

---

50KHz (50174) @ 58.19% Duty Cycle

R1 - 4.7K
R2 - 12K
C1 - .001uF

---

60KHz (59975) @ 50.02% Duty Cycle

R1 - 10Ω
R2 - 12K
C1 - .001uF

---

65KHz (65454.54) @ 54.54% Duty Cycle   (Drive an Inverter  i.e. +12VDC to -12VDC)

R1 - 2K
R2 - 10K
C1 - .001uF

---

69KHz (68.714) @ 52.38% Duty Cycle

R1 - 1K
R2 - 10K
C1 - .001uF

---

70KHz (70038.91) @ 51.36% Duty Cycle  

R1 - 560Ω
R2 - 10K
C1 - .001uF

---

75KHz (75156.58) @ 51.46% Duty Cycle

R1 - 560Ω
R2 - 9.3K
C1 - .001uF

---

107KHz (107.462) @ 75.37% Duty Cycle

R1 - 6.8K
R2 - 3.3K
C1 - .001uF

---

110KHz (110.091) @ 75.99% Duty Cycle

R1 - 6.8K
R2 - 3.14K   1%
C1 - .001uF

---

120KHz (120.25) @ 91.67% Duty Cycle

R1 - 10K
R2 - 1K
C1 - .001uF

---

200KHz (202816.90) @ 89.44% Duty Cycle

R1 - 56K
R2 - 7.7K
C1 - 100pF

---

NOTE: Due to the tolerance of the Resistors, the given Frequency may vary.
             New +		This chart is from 3ms to 200KHz
	 Modified  =

Ted J Mieske - of: http://elecurls.tripod.com/ - Updated: 11/24/2024