SMD Resistor Code Calculator

3-Digit Code Format:

• First two digits: significant figures

• Third digit: multiplier (power of 10)

• Use "R" for decimal point (e.g., 3R3 = 3.3Ω, R47 = 0.47Ω)

• Tolerance: ±5%

Enter Code:

Enter 3 characters (digits 0-9 or R for decimal point)

100 220 471 102 104 3R3 R47

Third Digit	Multiplier	Example	Result
0	×1	100	10Ω
1	×10	101	100Ω
2	×100	102	1kΩ
3	×1,000	103	10kΩ
4	×10,000	104	100kΩ
5	×100,000	105	1MΩ
6	×1,000,000	106	10MΩ

4-Digit Code Format:

• First three digits: significant figures

• Fourth digit: multiplier (power of 10)

• Use "R" for decimal point (e.g., 57R6 = 57.6Ω, 0R45 = 0.45Ω)

• Special case: "0" alone = zero ohm resistor

• Tolerance: ±1%

Enter Code:

Enter 4 characters (digits 0-9 or R for decimal point) or "0" for zero ohm

1001 4700 2001 1002 57R6 0R45 0

Fourth Digit	Multiplier	Example	Result
0	×1	1000	100Ω
1	×10	1001	1kΩ
2	×100	1002	10kΩ
3	×1,000	1003	100kΩ
4	×10,000	1004	1MΩ
5	×100,000	1005	10MΩ

EIA-96 Code Format:

• Two digits (01-96): lookup code for standard value

• One letter (A-Z): multiplier code

• Example: 38C = 243 × 100 = 24.3kΩ

• Tolerance: ±1%

Enter Code:

Enter 3 characters: two digits (01-96) + one letter (A-Z)

01A 01C 38C 92Z 50B