SMD Resistor Code Calculator

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eia-96 resistor code 01c

EIA-96 SMD Resistor Code: How to Read 01C

EIA-96 marking is not read like the others: the two digits are not the value, and the letter is not the end of an abbreviation. They point to a value in a 96-entry table and to a multiplier. This page opens the tool on 01C, which is 10 kΩ, and the Tables tab lists all 96 indexes and the nine letters so you can check any 1% code.

Index, base value and letter

The E96 series has 96 values per decade, from 1.00 to 9.76. In the marking, index 01 corresponds to 100, 02 to 102, 03 to 105 and so on up to 96, which corresponds to 976. The letter multiplies that base: A is × 1, B is × 10, C is × 100, D is × 1,000, E is × 10,000 and F is × 100,000. The letters Z, Y and X cover low values, × 0.001, × 0.01 and × 0.1. That is why 01C is 100 × 100 = 10,000 Ω and 10C is 124 × 100 = 12,400 Ω.
The table has alternate letters: R means the same as Y (× 0.01), S the same as X (× 0.1) and H the same as B (× 10). Two independent sources we checked list the same nine families, and the 96 base values match the computed E96 series. Even so, if a specific manufacturer uses another convention, its datasheet has the final word. The tool does not decode letters outside this table and warns when the index is not between 01 and 96.
For the reverse path, start from the value. 4.75 kΩ is 475 × 10, index 66 and multiplier B: code 66B. The value 4.7 kΩ is not in E96 (the series has 4.64 and 4.75), so it has no exact EIA-96 code, and the tool shows the nearest neighbor. That is why EIA-96 only appears on 1% parts of E96 values, while 5% E24 resistors use the 3-digit code.

Worked EIA-96 codes

01C: this page

Input: 01C
Expected output: 10k

Index 01 = 100, letter C = × 100: 10,000 Ω.

10C: an index of 124

Input: 10C
Expected output: 12.4k

Index 10 = 124, × 100: 12,400 Ω.

96C: the last index

Input: 96C
Expected output: 97.6k

Index 96 = 976, × 100: 97,600 Ω.

01Y: a low value

Input: 01Y
Expected output: 1

Index 01 = 100, letter Y = × 0.01: 1 Ω.

66X: with a decimal

Input: 66X
Expected output: 47.5

Index 66 = 475, letter X = × 0.1: 47.5 Ω.

25C: 17.8 kΩ

Input: 25C
Expected output: 17.8k

Index 25 = 178, × 100: 17,800 Ω.

Full tool FAQ

What does 103 mean on an SMD resistor?

It means 10 kΩ. The first two digits (10) are the value and the third (3) is the power of ten: 10 × 10³ = 10,000 Ω. It is not 103 ohms.

How do I read an SMD resistor with an R in the code, like 4R7?

What is the EIA-96 code and how do I read 01C?

What is the difference between the 3-digit and 4-digit codes?

What does 000 or 0 mean on an SMD resistor?

Can I convert a value in ohms to the SMD code?

Why can a code like 47R be read two ways?

What are the EIA-96 multiplier letters?

Can the last digit be 8 or 9?

Does the code tell me the resistor's tolerance?

Frequently asked questions

How do I read the code 01C on an SMD resistor?

Index 01 is 100 in the E96 table and the letter C multiplies by 100: 100 × 100 = 10,000 Ω, or 10 kΩ. It is a 1% part.

What are the EIA-96 letters?

Z = × 0.001; Y or R = × 0.01; X or S = × 0.1; A = × 1; B or H = × 10; C = × 100; D = × 1,000; E = × 10,000; F = × 100,000.

Why does EIA-96 use a letter and two digits?

To fit three significant figures into three characters. The two digits point to the value in the 96-entry list, which already carries the three figures, and the letter gives the power of ten.

Does every 1% resistor use EIA-96?

No. EIA-96 is common on small 1% parts, but many manufacturers use the 4-digit code (1002) or leave the body unmarked. Check the component's datasheet.

What is the EIA-96 code for 4.7 kΩ?

No exact one: 4.7 kΩ is not in E96. The neighbors are 4.64 kΩ and 4.75 kΩ, and the latter is 66B (index 66 = 475, B = × 10).

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eia-96 resistor code 01c

EIA-96 SMD Resistor Code: How to Read 01C

Index, base value and letter

The E96 series has 96 values per decade, from 1.00 to 9.76. In the marking, index 01 corresponds to 100, 02 to 102, 03 to 105 and so on up to 96, which corresponds to 976. The letter multiplies that base: A is × 1, B is × 10, C is × 100, D is × 1,000, E is × 10,000 and F is × 100,000. The letters Z, Y and X cover low values, × 0.001, × 0.01 and × 0.1. That is why 01C is 100 × 100 = 10,000 Ω and 10C is 124 × 100 = 12,400 Ω.

The table has alternate letters: R means the same as Y (× 0.01), S the same as X (× 0.1) and H the same as B (× 10). Two independent sources we checked list the same nine families, and the 96 base values match the computed E96 series. Even so, if a specific manufacturer uses another convention, its datasheet has the final word. The tool does not decode letters outside this table and warns when the index is not between 01 and 96.

For the reverse path, start from the value. 4.75 kΩ is 475 × 10, index 66 and multiplier B: code 66B. The value 4.7 kΩ is not in E96 (the series has 4.64 and 4.75), so it has no exact EIA-96 code, and the tool shows the nearest neighbor. That is why EIA-96 only appears on 1% parts of E96 values, while 5% E24 resistors use the 3-digit code.

Worked EIA-96 codes

01C: this page

Input: 01C
Expected output: 10k

Index 01 = 100, letter C = × 100: 10,000 Ω.

10C: an index of 124

Input: 10C
Expected output: 12.4k

Index 10 = 124, × 100: 12,400 Ω.

96C: the last index

Input: 96C
Expected output: 97.6k

Index 96 = 976, × 100: 97,600 Ω.

01Y: a low value

Input: 01Y
Expected output: 1

Index 01 = 100, letter Y = × 0.01: 1 Ω.

66X: with a decimal

Input: 66X
Expected output: 47.5

Index 66 = 475, letter X = × 0.1: 47.5 Ω.

25C: 17.8 kΩ

Input: 25C
Expected output: 17.8k

Index 25 = 178, × 100: 17,800 Ω.

Full tool FAQ

What does 103 mean on an SMD resistor?

It means 10 kΩ. The first two digits (10) are the value and the third (3) is the power of ten: 10 × 10³ = 10,000 Ω. It is not 103 ohms.

How do I read an SMD resistor with an R in the code, like 4R7?

What is the EIA-96 code and how do I read 01C?

What is the difference between the 3-digit and 4-digit codes?

What does 000 or 0 mean on an SMD resistor?

Can I convert a value in ohms to the SMD code?

Why can a code like 47R be read two ways?

What are the EIA-96 multiplier letters?

Can the last digit be 8 or 9?

Does the code tell me the resistor's tolerance?

Frequently asked questions

How do I read the code 01C on an SMD resistor?

Index 01 is 100 in the E96 table and the letter C multiplies by 100: 100 × 100 = 10,000 Ω, or 10 kΩ. It is a 1% part.

What are the EIA-96 letters?

Z = × 0.001; Y or R = × 0.01; X or S = × 0.1; A = × 1; B or H = × 10; C = × 100; D = × 1,000; E = × 10,000; F = × 100,000.

Why does EIA-96 use a letter and two digits?

To fit three significant figures into three characters. The two digits point to the value in the 96-entry list, which already carries the three figures, and the letter gives the power of ten.

Does every 1% resistor use EIA-96?

No. EIA-96 is common on small 1% parts, but many manufacturers use the 4-digit code (1002) or leave the body unmarked. Check the component's datasheet.

What is the EIA-96 code for 4.7 kΩ?

No exact one: 4.7 kΩ is not in E96. The neighbors are 4.64 kΩ and 4.75 kΩ, and the latter is 66B (index 66 = 475, B = × 10).