**Posted by :**Resistance Calculator |

**Published on :**25 March |

**Label :**Resistance Calculators

** SMD Resistor Code Calculator**

The surface mount resistor code calculator can be used to find the value of resistance of a SMD resistor using the marking code found on it’s surface.

For calculating the resistance value, input the 3 digit or 4 digit or EIA-96 code, the calculated resistance value will appear below.

# SMD Resistor Code Calculator

Enter SMD Resistor Code |

Resistance value: 0 Ω |

**SMD Resistor Code Format**

SMD resistors with standard tolerances use a 3 digit or a 4 digit code to put the resistance value on it’s surface. The first two numbers of this code indicates the important digits, and the third and fourth will be the multiplier. 'R' in marking is used to inform the position of a decimal point.

**SMD resistor value calculations**

Almost on all SMD resistors, the 3 digit or 4 digit code are marked, which resembles the color code for through-hole resistors. Even we can get EIA-96 codes on SMD resistors with accurate tolerance.**3-digit code marking**

A 3-digit code is marked on a simple standard tolerance SMD resistors. Here the first two numbers will inform the important digits, and the third digit is the multiplier. There’s no multiplier for the resistance which are less than 10 ohms, here in this case the 'R' is used to indicate the decimal point position.

Examples for 3-digit code:

120 = 12 x 100 (1) = 12Ω (it’s not 120Ω)

271 = 27 x 101 (10) = 270Ω

302 = 30 x 102 (100) = 3000Ω or 3kΩ

4R2 = 4.2Ω

51R = 51Ω

**4-digit code marking**

A 4-digit code is marked on a precised or accurate tolerance SMD resistors. The resistor with 1% tolerance. Here the first three numbers will inform the important digits, and the fourth digit is the multiplier. There’s no multiplier for the resistance which are less than 100 ohms, here in this case the 'R' is used to indicate the decimal point position.

Examples for 4-digit code:

2700 = 270 x 100 (1) = 270Ω (not 2700Ω)

1001 = 100 x 101 (10) = 1000Ω or 1kΩ

3002 = 300 x 102 (100) = 30000Ω or 30kΩ

12R0 = 12.0Ω

**EIA-96 code marking**

On accurate or precised tolerance SMD resistors, a coding system related to EIA-96 can be found. It apeears on 1% tolerance resistor. It has three character code, where first 2 characters tell us the 3 important digits of resistor value as per below table and the third character I.e alphabet letter informs about the multiplier.

Examples for EIA-96 code:

02Y = 102 x 0.01 = 1.02Ω

65X = 464 x 0.1 = 46.4Ω

05A = 110 x 1 = 110Ω

20B = 158 x 10 = 1.58kΩ

07C = 115 x 100 = 11.5kΩ

Download excel sheet for EIA-96 SMD Resistor Code List.

**Conclusion**

SMD resistor code calculator presented here can easily calculate the resistance value of 3 digit, 4 digit code and EIA-96 code.