SMD Resistor Calculator

🔧 SMD Resistor Code Calculator

3 Digit Code

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Enter a 3 digit code

📋 Format: First 2 digits are the value, third is the multiplier (number of zeros).
📌 Examples: 472 = 4.7kΩ, 103 = 10kΩ, 330 = 33Ω

4 Digit Code

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Enter a 4 digit code

📋 Format: First 3 digits are the value, fourth is the multiplier.
📌 Examples: 4702 = 47kΩ, 1001 = 1kΩ, 2200 = 220Ω

EIA-96 Code (1% Tolerance)

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Enter an EIA-96 code

📋 Format: 2 digits (01-96) + multiplier letter (A-Z).
📌 Examples: 01A = 100Ω, 68C = 49.9kΩ, 76X = 604MΩ

📊 View EIA-96 code table

How do SMD codes work?

SMD (Surface Mount Device) resistors use different coding systems to indicate their value:

3 Digit Code (±5% tolerance)

  • Digits 1-2: Significant value
  • Digit 3: Multiplier (number of zeros to add)
  • Example: 472 = 47 × 10² = 4700Ω = 4.7kΩ

4 Digit Code (±1% tolerance)

  • Digits 1-3: Significant value
  • Digit 4: Multiplier
  • Example: 4702 = 470 × 10² = 47000Ω = 47kΩ

EIA-96 Code (±1% precision tolerance)

  • Digits 1-2: Value code (01-96) representing a specific value from the E96 series
  • Letter: Multiplier
    • Z = ×0.001, Y/R = ×0.01, X/S = ×0.1
    • A = ×1, B/H = ×10, C = ×100
    • D = ×1000, E = ×10000, F = ×100000

“R” Notation

The letter R indicates the decimal point:

  • 4R7 = 4.7Ω
  • R47 = 0.47Ω
  • 47R = 47Ω

Common Values Tables

Info

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3 Digit Codes (E24 Series, ±5%)

CodeResistanceCodeResistanceCodeResistance
R100.1 Ω R220.22 Ω R470.47 Ω
1R01 Ω 2R22.2 Ω 4R74.7 Ω
10010 Ω 22022 Ω 47047 Ω
101100 Ω 221220 Ω 471470 Ω
1021 kΩ 2222.2 kΩ 4724.7 kΩ
10310 kΩ 22322 kΩ 47347 kΩ
104100 kΩ 224220 kΩ 474470 kΩ
1051 MΩ 2252.2 MΩ 4754.7 MΩ

4 Digit Codes (E96 Series, ±1%)

CodeResistanceCodeResistanceCodeResistance
R1000.1 Ω R2200.22 Ω R4700.47 Ω
1R001 Ω 2R202.2 Ω 4R704.7 Ω
10R010 Ω 22R022 Ω 47R047 Ω
1000100 Ω 2200220 Ω 4700470 Ω
10011 kΩ 22012.2 kΩ 47014.7 kΩ
100210 kΩ 220222 kΩ 470247 kΩ
1003100 kΩ 2203220 kΩ 4703470 kΩ
10041 MΩ 22042.2 MΩ 47044.7 MΩ

EIA-96 Codes (±1% Precision)

CodeResistanceCodeResistanceCodeResistance
01Y1 Ω 07Y1.15 Ω 19Y1.54 Ω
01X10 Ω 10X12.4 Ω 25X17.8 Ω
01A100 Ω 10A124 Ω 25A178 Ω
01B1 kΩ 10B1.24 kΩ 25B1.78 kΩ
01C10 kΩ 50C32.4 kΩ 68C49.9 kΩ
01D100 kΩ 50D324 kΩ 96D976 kΩ
01E1 MΩ 50E3.24 MΩ 96E9.76 MΩ