How do I read a 4 digit SMD resistor code?

In a 4-digit SMD resistor code, the first three digits are significant figures and the fourth digit is the multiplier (power of 10). For example, 1002 means 100 × 10² = 10,000 ohms = 10 kΩ.

What is the value of a 102 SMD resistor?

The SMD resistor code 102 means 10 × 10² = 1000 ohms = 1 kΩ. The first two digits (10) are the significant figures and the third digit (2) is the multiplier.

SMD Resistor Calculator – Decode Any SMD Code Instantly | Free Tool

Electronics · Free Tool

SMD Resistor Calculator — Decode Any Code Instantly

Whether you’re reading a 4 digit SMD resistor calculator code like 1002 or decoding an EIA-96 alphanumeric code like 01C, this free SMD resistor calculator gives you the exact resistance in ohms in seconds. Need the 100 SMD resistor value or the 102 SMD resistor value? Just enter the code and get instant results — no app download needed. This tool works as a full SMD resistor calculator app on any mobile browser and replaces the need for a SMD resistor code chart PDF. It supports 3-digit, 4-digit, and EIA-96 formats, covering the entire SMD resistor code list used in modern PCB design and electronics repair.

SMD Resistor Calculator

Select code format, enter your SMD code, and decode instantly

SMD Code (3-Digit)

Tolerance

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RESISTANCE VALUE

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Exact Ohms

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Tolerance

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Code Format

How To Use

Step-by-Step Guide to the SMD Resistor Calculator

Count the Characters on the Resistor

Look at your SMD resistor and count the marking characters. 3 digits = 3-digit format. 4 digits = 4-digit format. A mix of numbers and a letter (like 01C) = EIA-96 format.

Select the Correct Code Format

Click the matching tab — 3-Digit, 4-Digit, or EIA-96. Using the wrong format will give incorrect results. The EIA-96 system uses a 2-digit number followed by a letter multiplier.

Enter the SMD Code

Type the exact marking from the resistor body. For example, enter 102 for a 3-digit code, 4702 for a 4-digit code, or 01C for an EIA-96 code. The input is case-insensitive.

Select Tolerance and Click Decode

Choose your resistor’s tolerance marking if known, then press Decode. Instantly see the resistance value in ohms, kΩ, or MΩ along with the full breakdown.

Formula

SMD Resistor Code Formula Explained

The SMD resistor calculator ohms uses different decoding formulas depending on the code format:

3-Digit: R = [D1 D2] × 10^D3
4-Digit: R = [D1 D2 D3] × 10^D4
EIA-96: R = EIA96_Table[NN] × Multiplier[X]

3-Digit Example (102): Significant digits = 10, Multiplier = 10² = 100 → 1000Ω = 1kΩ
4-Digit Example (4702): Significant digits = 470, Multiplier = 10² = 100 → 47,000Ω = 47kΩ
EIA-96 Example (01C): Code 01 = 100Ω base, C multiplier = ×10 → 1000Ω = 1kΩ

Special code 0 or 000 always means a jumper wire (0Ω resistor).

The EIA-96 system is used for precision 1% tolerance SMD resistors and encodes values from the E96 series using a 2-digit index plus a single-letter decade multiplier (A through Z).

Quick Reference

Common SMD Resistor Code List

Here are frequently searched SMD resistor code values from the standard SMD resistor code chart:

SMD Code	Format	Resistance	Decoded As
`100`	3-Digit	10 Ω	10 × 10⁰
`101`	3-Digit	100 Ω	10 × 10¹
`102`	3-Digit	1 kΩ	10 × 10²
`103`	3-Digit	10 kΩ	10 × 10³
`104`	3-Digit	100 kΩ	10 × 10⁴
`4702`	4-Digit	47 kΩ	470 × 10²
`1002`	4-Digit	10 kΩ	100 × 10²
`01C`	EIA-96	1 kΩ	100 × 10¹
`0` / `000`	Any	0 Ω	Jumper Wire

Smart Features

Why This SMD Resistor Calculator Stands Out

3 Format Support

Handles all three common SMD resistor code systems — 3-digit, 4-digit, and EIA-96 alphanumeric — in a single tool. No need to switch between different calculators or PDF charts.

Auto Unit Formatting

Results are automatically displayed in the most readable unit — Ω, kΩ, or MΩ — so you never have to manually convert. Replaces the need for a full SMD resistor code chart PDF for everyday use.

Tolerance Aware

Select the tolerance band to get a complete component profile. Shows the exact resistance range your component can span — useful for tight-tolerance circuit design and component verification.

FAQ

SMD Resistor Calculator — Frequently Asked Questions

How do I use a 4 digit SMD resistor calculator?

For a 4-digit SMD resistor code, the first three digits are the significant figures and the fourth digit is the power-of-10 multiplier. For example, 4702 means 470 × 10² = 47,000Ω = 47kΩ. Select the “4-Digit Code” tab in the calculator above, type your code, and click Decode to get the instant result in ohms, kΩ, or MΩ.

What is the SMD resistor code list and where can I find it?

The SMD resistor code list is the complete set of standard markings used on surface mount resistors. 3-digit codes cover values from 1Ω to 9.9MΩ, 4-digit codes add one extra significant figure for precision, and EIA-96 alphanumeric codes cover the full E96 precision resistor series. Instead of a static PDF chart, use this calculator to instantly look up any code from the list in real time.

What is the 102 SMD resistor value?

The 102 SMD resistor value is 1,000 ohms (1 kΩ). In the 3-digit code system, the first two digits (10) are the significant figures and the third digit (2) means ×10² = ×100. So 10 × 100 = 1,000Ω. This is one of the most commonly used values in electronics and appears frequently in voltage dividers and pull-up/pull-down circuits.

What is the 01C SMD resistor value in the EIA-96 system?

In the EIA-96 system, 01C means: code “01” maps to a base value of 100 from the E96 table, and the letter “C” is the multiplier ×10. So 100 × 10 = 1,000Ω = 1kΩ. EIA-96 is used for 1% tolerance precision resistors that are too small to print a full 4-digit code. Enter 01C in the EIA-96 tab of this SMD resistor calculator to verify.

What is the 100 SMD resistor value?

The SMD code 100 represents 10 ohms. The significant digits are 10 and the multiplier is 10⁰ = 1, so 10 × 1 = 10Ω. Note: do not confuse this with a 4-digit code of 1000 which would mean 100 × 10⁰ = 100Ω. Always identify the number of digits first to ensure you use the correct decoding formula.

Is there an SMD resistor calculator app I can use on my phone?

Yes — this page works perfectly as a mobile SMD resistor calculator app. Simply open this URL on your Android or iPhone browser and bookmark it to your home screen. It loads fast, supports all three SMD code formats, and gives instant results just like any dedicated app. No Play Store or App Store download required.

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Conclusion

Decode Any SMD Resistor Code — Every Time

Whether you’re a hobbyist trying to identify parts on a board, an engineer verifying component values, or a student learning electronics — this free SMD resistor calculator handles it all. From the common 3-digit codes like 102 and 100, to the precise 4-digit and EIA-96 alphanumeric formats like 01C, every code is decoded instantly in ohms. No more flipping through a SMD resistor code chart PDF or downloading a separate app — just open this page, enter the code, and get your answer. Bookmark it now and use it at your workbench whenever you need it.

Smd resistor calculator