SMD Resistor Code Calculator
SMD resistor code calculator presented here can be used to find the value of resistance of a surface mount resistor using it's surface marking code.
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 resistor value calculator calculates the 3 digit or a 4 digit code resistor value to generate the resistance value. 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.
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.