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SMD Resistor Code Calculator

EIA-3 103 is 10 kΩ (typically ±5 %).

By Jasper · Updated

Calculator

PASS10 kΩEIA-3 10 kΩ

Ambiguous markings such as 10R show both EIA-96 (R = ×0.01) and R-notation (R as the decimal point).

eia-3
10 kΩ · EIA-3 10 kΩ
  • Pass SMD code: EIA-3 10 kΩ

Formula

3-digit EIA

R=(d1d2)×10m R = (d1 d2) × 10^m

EIA-96

R=round(100×10(i-1)/96)×m R = round(100 · 10^((i−1)/96)) × letter multiplier

Variables

Symbol Meaning Unit Typical range Precision Default
code Marking — — 4 sig 103
R Resistance (primary) Ω — 4 sig —
kind Primary encoding — — 1 sig —

Worked example

EIA-3 103

Input Value
code · Marking 103
Output Value
R · Resistance (primary) 10 kΩ
kind · Primary encoding eia-3

10R is both EIA-96 and R-notation

Primary is EIA-96 (1.24 Ω). R-notation 10 Ω is listed as a second reading.

Input Value
code · Marking 10R
Output Value
R · Resistance (primary) 1.24 Ω
kind · Primary encoding eia-96

R-notation 4R7

Input Value
code · Marking 4R7
Output Value
R · Resistance (primary) 4.7 Ω

EIA-96 01C

Input Value
code · Marking 01C
Output Value
R · Resistance (primary) 10 kΩ

How it works

Chip resistors do not have colour bands. The marking is a short code that is sometimes ambiguous on purpose: the same three characters can be EIA-96 or R-notation.

Type the letters you see on the part. When more than one encoding is valid, every reading is listed so you can match the series (E24 vs E96) on the reel.

Pitfalls

  • Treating every three-character code as EIA-3. Letter multipliers are EIA-96.
  • Dropping one reading of 10R. R is both ×0.01 in EIA-96 and a decimal point in R-notation.
  • EIA-96 index 00 or 97–99 is outside 01–96.

FAQ

What does 10R mean?

Both EIA-96 (index 10, letter R = ×0.01 → 1.24 Ω) and R-notation (10 Ω). The calculator lists both.

How do I read 103?

EIA-3 — 10 × 10³ = 10 kΩ, typically ±5 %.

What is 01C?

EIA-96 index 01 with C = ×100 → 10 kΩ, typically ±1 %.

Is 000 a jumper?

Yes. All-zero markings decode as a 0 Ω link.

Related

Sources