What does the SMD resistor code 1002 mean?

In a 4-digit code the first three digits are the value and the fourth digit is the multiplier. 1002 means 100 x 100 = 10000 ohms, which is 10 kilo-ohms. 4-digit codes are typically 1 percent tolerance.

What does the code 4K7 mean on a resistor?

The letter is the decimal point. 4K7 means 4.7 kilo-ohms (4700 ohms). Similarly 1K2 means 1.2 kilo-ohms, 2M2 means 2.2 mega-ohms, 4R7 means 4.7 ohms, 0R22 means 0.22 ohms and 10K means 10 kilo-ohms.

What is an EIA-96 resistor code like 01C?

EIA-96 is a 3-character code for 1 percent SMD resistors: two digits look up a value from a table and the letter is a multiplier. 01 means 100 and C means x 100, so 01C = 10000 ohms = 10 kilo-ohms. 39D means 249 x 1000 = 249 kilo-ohms.

Which code is a 1 kilo-ohm resistor?

1 kilo-ohm (1000 ohms) can be marked 102 in the 3-digit system (10 x 100) or 1001 in the 4-digit system (1000 x 1). Both decode to 1000 ohms.

Which SMD code is 4.7 kilo-ohm?

4.7 kilo-ohm (4700 ohms) is marked 472 in the 3-digit system (47 x 100) or 4701 in the 4-digit system (470 x 10).

Do SMD resistors use colour bands like through-hole resistors?

No. SMD resistors are too small for colour bands, so they use printed numeric codes (3-digit, 4-digit or EIA-96). Colour bands are used on larger through-hole resistors.

SMD Resistor Code Calculator

Type the code printed on a surface-mount resistor and get its value instantly. Works with 3-digit codes (103 = 10 kΩ), 4-digit codes (1002 = 10 kΩ), letter notation (4K7 = 4.7 kΩ, 4R7 = 4.7 Ω) and EIA-96 codes (01C = 10 kΩ).

सापट पर लिखे ह्रीतु के हिसाब से जानी तुजे साध साध पाएं। 3-digit (जैसे 103 = 10 kΩ), 4-digit, R-notation और EIA-96 सहित सभी सपण्टै हैं।

Sapet par likhe code se value turant nikalo. 3-digit (jaise 103 = 10 kΩ), 4-digit, letter notation (4K7) aur EIA-96 sabhi saported hain.

Quick answer: a resistor marked 103 is 10,000 Ω = 10 kΩ (10 × 1000). A resistor marked 472 is 4.7 kΩ, 1002 is 10 kΩ, 4K7 is 4.7 kΩ, and 01C is 10 kΩ.

Resistor code (e.g. 103, 4K7, 1002, 01C)

Tip: most codes are 3 digits. Letters work too: 4K7 = 4.7 kΩ. Uppercase or lowercase both.

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Enter a code above.

How the SMD resistor code works

Surface-mount (SMD/chip) resistors are too small for colour bands, so the value is printed as a short code. There are four common formats:

1. Three-digit code (most common, usually ±5%)

The first two digits are the value, the third digit is the number of zeros to add.

Code	Meaning	Value
`103`	10 × 1000	10,000 Ω = 10 kΩ
`472`	47 × 100	4,700 Ω = 4.7 kΩ
`470`	47 × 1	47 Ω (not 470!)
`220`	22 × 1	22 Ω

2. Four-digit code (1% precision)

The first three digits are the value, the fourth digit is the multiplier.

Code	Meaning	Value
`1002`	100 × 100	10,000 Ω = 10 kΩ
`4701`	470 × 10	4,700 Ω = 4.7 kΩ
`4700`	470 × 1	470 Ω (not 4700!)
`2001`	200 × 10	2,000 Ω = 2 kΩ

3. Letter notation (R, K, M — the letter is the decimal point)

The letter replaces the decimal point: R = ohms, K = kilo-ohms, M = mega-ohms (G = giga-ohms). This avoids a leading dot that could be missed when printed.

Code	Meaning	Value
`4K7`	4.7 kilo-ohms	4.7 kΩ
`1K2`	1.2 kilo-ohms	1.2 kΩ
`10K`	10 kilo-ohms	10 kΩ
`2M2`	2.2 mega-ohms	2.2 MΩ
`4R7`	4.7 ohms	4.7 Ω
`0R22` or `R22`	0.22 ohms	0.22 Ω
`10R`	10 ohms	10 Ω

4. EIA-96 code (1% resistors, small packages)

Three characters: two digits look up a base value in the EIA-96 table, the letter is a multiplier.

Code	Lookup	Multiplier	Value
`01C`	01 → 100	C = ×100	10 kΩ
`39D`	39 → 249	D = ×1000	249 kΩ
`85X`	85 → 750	X = ×0.1	75 Ω

Full EIA-96 two-digit lookup table

Digits	Base	Digits	Base	Digits	Base	Digits	Base
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976

Letter multipliers: Z = ×0.001, Y/R = ×0.01, X/S = ×0.1, A = ×1, B = ×10, C = ×100, D = ×1000, E = ×10,000, F = ×100,000.

Common SMD resistor codes cheat sheet

Code	Value	Code	Value
`100`	10 Ω	`331`	330 Ω
`101`	100 Ω	`332`	3.3 kΩ
`102`	1 kΩ	`471`	470 Ω
`103`	10 kΩ	`472`	4.7 kΩ
`104`	100 kΩ	`473`	47 kΩ
`105`	1 MΩ	`474`	470 kΩ
`150`	15 Ω	`562`	5.6 kΩ
`220`	22 Ω	`682`	6.8 kΩ
`221`	220 Ω	`822`	8.2 kΩ
`222`	2.2 kΩ	`910`	91 Ω
`1001`	1 kΩ (4-digit)	`1002`	10 kΩ (4-digit)
`4K7`	4.7 kΩ	`1K2`	1.2 kΩ
`4R7`	4.7 Ω	`01C`	10 kΩ (EIA-96)

FAQ

What does a 103 SMD resistor mean?

103 means 10 followed by 3 zeros: 10 × 1000 = 10,000 Ω = 10 kΩ. The first two digits are the value, the third is the number of zeros.

Is a resistor marked 470 equal to 470 ohms?

No. 470 is 47 × 1 = 47 Ω. The third digit is a multiplier, not another value digit. For 470 Ω you need 471.

What does 1002 mean?

Four-digit code: 100 × 100 = 10 kΩ. Four-digit codes are typically 1% tolerance.

What do 4K7, 1K2 and 2M2 mean?

The letter is the decimal point: 4K7 = 4.7 kΩ, 1K2 = 1.2 kΩ, 2M2 = 2.2 MΩ, 4R7 = 4.7 Ω, 0R22 = 0.22 Ω, 10K = 10 kΩ.

What is EIA-96?

A 3-character code for 1% resistors: two digits look up a base value, the letter is a multiplier. 01C = 100 × 100 = 10 kΩ; 39D = 249 × 1000 = 249 kΩ.

Which code is 1 kΩ?

102 (10 × 100) or 1001 (1000 × 1). Both are 1000 Ω.

Which code is 4.7 kΩ?

472 (47 × 100) or 4701 (470 × 10).

Do SMD resistors use colour bands?

No — they are too small, so they use printed codes. Colour bands are for through-hole resistors. If you are repairing a laptop or phone board and need the part fitted, see our laptop repair service or engineer-approved parts.

About this tool

This calculator is maintained by Sayan Roy Chowdhury, the engineer behind Byte Sherlock, a laptop and mobile repair workshop in Barrackpore, West Bengal. We use these codes daily when tracing boards, and built this page because a fast decoder is genuinely useful on the bench. If you are debugging a dead laptop instead, send us the symptoms on WhatsApp.

Digits	Base	Digits	Base	Digits	Base	Digits	Base
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976

Digits	Base	Digits	Base	Digits	Base	Digits	Base
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976

Digits	Base	Digits	Base	Digits	Base	Digits	Base
01	100	25	178	49	316	73	562
02	102	26	182	50	324	74	576
03	105	27	187	51	332	75	590
04	107	28	191	52	340	76	604
05	110	29	196	53	348	77	619
06	113	30	200	54	357	78	634
07	115	31	205	55	365	79	649
08	118	32	210	56	374	80	665
09	121	33	215	57	383	81	681
10	124	34	221	58	392	82	698
11	127	35	226	59	402	83	715
12	130	36	232	60	412	84	732
13	133	37	237	61	422	85	750
14	137	38	243	62	432	86	768
15	140	39	249	63	442	87	787
16	143	40	255	64	453	88	806
17	147	41	261	65	464	89	825
18	150	42	267	66	475	90	845
19	154	43	274	67	487	91	866
20	158	44	280	68	499	92	887
21	162	45	287	69	511	93	909
22	165	46	294	70	523	94	931
23	169	47	301	71	536	95	953
24	174	48	309	72	549	96	976