How to read Capacitor CodesGrab an LCR or Capacitance meter, read the value of the capacitor you wish to replace. This is assuming the capacitor you are replacing is not damaged beyond the point of a reasonably accurate reading. Larger capacitors, like electrolytic, have the value printed on them clearly, such as 10uF, but smaller types often have just 2 or three numbers on them. 2 Numbers: These are read as PicoFarads. An example: 47 printed on a small disk can be assumed to be 47 PicoFarads (or 47pF). 3 Numbers: The first two are the 1^{st} and 2^{nd} significant digits and the third is a multiplier code. Most of the time the last digit tells you how many zeros to write after the first two digits, but this is not ALWAYS the case. eg. an extra digit might be indicating an ESR value. Capacitor Speak  milli, micro, nano, pico,1 milli Farad (or any other unit) is 1/1,000th or .001 times the unit. (10^{3}) 1 micro = 1/1,000,000 or 0.000 001 times the unit (10^{6} ) 1 nano = 1/1,000,000,000 or 0.000 000 001 times the unit (10^{9} ) 1 pico = 1/1,000,000,000,000 or 0.000 000 000 001 times the unit (10^{12} ) Table 1 Digit multipliers 

Third digit  Multiplier (this times the first two digits gives you the value in PicoFarads) 

0  1  1  10  2  100  3  1,000  4  10,000  5  100,000  6 not used   7 not used   8  .01  9  .1 
Example: A capacitor marked 104 is 10 with 4 more zeros or 100,000pF which is otherwise referred to as a 0.1uF capacitor. Tolerance code is given by a single letter. Example a 103J is a 10,000 pF with +/5% tolerance
Table 2 Letter tolerance code 

Letter symbol  Tolerance of capacitor 

B  +/ 0.10%  C  +/ 0.25%  D  +/ 0.5%  E  +/ 0.5%  F  +/ 1%  G  +/ 2%  H  +/ 3%  J  +/ 5%  K  +/ 10%  M  +/ 20%  N  +/ 0.05%  P  +100% ,0%  Z  +80%, 20% 
Exceptions: There is sometimes a letternumberletter (like Z5U) code that gives additional information. Example. A 224 Z5U would be a 220,000 pF (or .22 uF) cap with a low temperature rating of 10 deg C a high temperature rating of +85 Deg C and a tolerance of +22%,56%.
Table 3 Dielectric codes 

First symbol (a letter)  Low temperature requirement  Second symbol (a number)  High Temperature requirement  Third Symbol (a letter)  MAX. Capacitance change over temperature 

Z  +10 deg. C  2  +45 deg. C  A  +1.0%  Y  30 deg. C  4  +65 deg. C  B  +/ 1.5%  X  55 deg. C  5  +85 deg. C  C  +/ 2.2%    6  +105 deg. C  D  +/ 3.3%    7  +125 deg. C  E  +/ 4.7%      F  +/ 7.5%      P  +/ 10.0%      R  +/ 15.0%      S  +/ 22.0%      T  +22%, 33%      U  +22%, 56%      V  +22%, 82% 
There are some Capacitor colour codes  the last dot is the tolerance code where brown is +/1% red +/2% as in the resistor colour code with two exceptions black is +/ 20% and white is +/ 10% going backward the three dots to the left of the tolerance dot form the value in pF There will be two or three more colour dots before the value but they mean different things about temperature range and coefficient depend which one of three systems is used. There are two more number systems seen on caps. The first one can be recognized as the EIA because it starts with an R. R DM 15 F 471(R) J 5 O (C) The above number means the following R  tells us this is an EIA code 

DM  is a dipped case style CM would be a molded case style 

15  is the case size code  if anyone asks I will put up a table for this 

F  is the characteristic code from table 4 

471R  the R is a decimal point when used (not often) the first two digits form the significant value and the third is the multiplier thus, this is a 470pF part 

J  is the capacitance tolerance code as given in table 2 above thus J is a 5% part 

5  is the DC working voltage in hundreds of volts (EIA only) thus 500V 

O  is the temperature range from table 5 

C  tells us the leads are crimped where a S would tell us they are straight. 

This next one is a Military code example: CM 15 B D 332 K N 3 CM  is the case code  DM is a dipped case style CM would be a molded case style 

15  is the case size code  if anyone asks I will put up a table for this 

B  characteristic code tells us it doesn't have a drift specified (from table 4) 

D  is the Military voltage code from table 6 

332  tells us that it is 3,300pF 

K  tells us from table 2 that this is a 10% part 

N  gives us our temperature range of 55 to 85 °C from table 5 

3  The 3gives the vibration grade 3 tells us 20g at 10 to 2,000 hz for 12 hours (1 is 10G at 10 to 55 Hz for 4.5 hours) 

Table 4 characteristic codes 

EIA or MIL characteristic code  Maximum capacitance drift  Maximum range of Temp coefficient 

B  Not specified  Not specified  C  +/(0.5% + 0.1pF)  +/ 200 ppm/°C  D  +/(0.3% + 0.1pF)  +/ 100 ppm/°C  E  +/(0.1% + 0.1pF)  20 to +100 ppm/°C  F  +/(0.05% + 0.1pF)  0 to +70 ppm/°C 
Table 5 Temperature range 

M  55 to 70 °C  N  55 to 85 °C  O  55 to 125 °C  P  55 to 150 °C 
Table 6 Mil voltage range code in volts 

A  100  B  250  C  300  D  500  E  600  F  1,000  G  1,200  H  1,500  J  2,000  K  2,500  L  3,000  M  4,000  N  5,000  P  6,000  Q  8,000  R  10,000  S  12,000  T  15,000  U  20,000  V  25,000  W  30,000  X  35,000 
Cog or NPO refer to caps that don't have any temperature drift (at least in theory.) CONVERSION TABLE  uF  nF  pFTo use this table, just read across. For example, 1uF is same 1,000nF or 1,000,000pF.
eg.  uF  nF  pF   eg.  uF  nF  pF  105  1uF  1000nF  1000000pF   102  0.001uF  1nF  1000pF   0.82uF  820nF  820000pF    0.00082uF  0.82nF  820pF   0.8uF  800nF  800000pF    0.0008uF  0.8nF  800pF   0.7uF  700nF  700000pF    0.0007uF  0.7nF  700pF   0.68uF  680nF  680000pF    0.00068uF  0.68nF  680pF   0.6uF  600nF  600000pF    0.0006uF  0.6nF  600pF   0.56uF  560nF  560000pF    0.00056uF  0.56nF  560pF   0.5uF  500nF  500000pF    0.0005uF  0.5nF  500pF   0.47uF  470nF  470000pF    0.00047uF  0.47nF  470pF   0.4uF  400nF  400000pF    0.0004uF  0.4nF  400pF   0.39uF  390nF  390000pF    0.00039uF  0.39nF  390pF   0.33uF  330nF  330000pF    0.00033uF  0.33nF  330pF   0.3uF  300nF  300000pF    0.0003uF  0.3nF  300pF   0.27uF  270nF  270000pF    0.00027uF  0.27nF  270pF   0.25uF  250nF  250000pF    0.00025uF  0.25nF  250pF   0.22uF  220nF  220000pF    0.00022uF  0.22nF  220pF   0.2uF  200nF  200000pF    0.0002uF  0.2nF  200pF   0.18uF  180nF  180000pF    0.00018uF  0.18nF  180pF   0.15uF  150nF  150000pF    0.00015uF  0.15nF  150pF   0.12uF  120nF  120000pF    0.00012uF  0.12nF  120pF  104  0.1uF  100nF  100000pF   101  0.0001uF  0.1nF  100pF   0.082uF  82nF  82000pF    0.000082uF  0.082nF  82pF   0.08uF  80nF  80000pF    0.00008uF  0.08nF  80pF   0.07uF  70nF  70000pF    0.00007uF  0.07nF  70pF   0.068uF  68nF  68000pF    0.000068uF  0.068nF  68pF   0.06uF  60nF  60000pF    0.00006uF  0.06nF  60pF   0.056uF  56nF  56000pF    0.000056uF  0.056nF  56pF   0.05uF  50nF  50000pF    0.00005uF  0.05nF  50pF   0.047uF  47nF  47000pF    0.000047uF  0.047nF  47pF   0.04uF  40nF  40000pF    0.00004uF  0.04nF  40pF   0.039uF  39nF  39000pF    0.000039uF  0.039nF  39pF   0.033uF  33nF  33000pF    0.000033uF  0.033nF  33pF   0.03uF  30nF  30000pF    0.00003uF  0.03nF  30pF   0.027uF  27nF  27000pF    0.000027uF  0.027nF  27pF   0.025uF  25nF  25000pF    0.000025uF  0.025nF  25pF   0.022uF  22nF  22000pF    0.000022uF  0.022nF  22pF   0.02uF  20nF  20000pF    0.00002uF  0.02nF  20pF   0.018uF  18nF  18000pF    0.000018uF  0.018nF  18pF   0.015uF  15nF  15000pF    0.000015uF  0.015nF  15pF   0.012uF  12nF  12000pF    0.000012uF  0.012nF  12pF  103  0.01uF  10nF  10000pF   100  0.00001uF  0.01nF  10pF   0.0082uF  8.2nF  8200pF    0.0000082uF  0.0082nF  8.2pF   0.008uF  8nF  8000pF    0.000008uF  0.008nF  8pF   0.007uF  7nF  7000pF    0.000007uF  0.007nF  7pF   0.0068uF  6.8nF  6800pF    0.0000068uF  0.0068nF  6.8pF   0.006uF  6nF  6000pF    0.000006uF  0.006nF  6pF   0.0056uF  5.6nF  5600pF    0.0000056uF  0.0056nF  5.6pF   0.005uF  5nF  5000pF    0.000005uF  0.005nF  5pF   0.0047uF  4.7nF  4700pF    0.0000047uF  0.0047nF  4.7pF   0.004uF  4nF  4000pF    0.000004uF  0.004nF  4pF   0.0039uF  3.9nF  3900pF    0.0000039uF  0.0039nF  3.9pF   0.0033uF  3.3nF  3300pF    0.0000033uF  0.0033nF  3.3pF   0.003uF  3nF  3000pF    0.000003uF  0.003nF  3pF   0.0027uF  2.7nF  2700pF    0.0000027uF  0.0027nF  2.7pF   0.0025uF  2.5nF  2500pF    0.0000025uF  0.0025nF  2.5pF   0.0022uF  2.2nF  2200pF    0.0000022uF  0.0022nF  2.2pF   0.002uF  2nF  2000pF    0.000002uF  0.002nF  2pF   0.0018uF  1.8nF  1800pF    0.0000018uF  0.0018nF  1.8pF   0.0015uF  1.5nF  1500pF    0.0000015uF  0.0015nF  1.5pF   0.0012uF  1.2nF  1200pF    0.0000012uF  0.0012nF  1.2pF  102  0.001uF  1nF  1000pF  ……….  1R0  0.000001uF  0.001nF  1pF 
