What is the formula for SMD Capacitor Code (104 = 100nF)?

Core formula: Code ABc = AB × 10^c pF (104 → 10×10⁴ = 100nF). The tool returns results instantly using this formula and the selected parameters.

What engineering notes should I keep in mind when using SMD Capacitor Code (104 = 100nF)?

Below 10pF, R is the decimal point: 4R7 = 4.7pF, R47 = 0.47pF. Four-digit codes (e.g. 1001) are three significant digits plus a multiplier: 1001 = 100×10¹ pF = 1nF. The code only gives capacitance; voltage rating and dielectric (X7R/C0G) come from the part number or datasheet.

SMD Capacitor Code (104 = 100nF)

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Two-way conversion between three- and four-digit EIA capacitor codes and capacitance, with code cross-reference, unit conversion and tolerance letters.

Key points

SMD Capacitor Code (104 = 100nF): Two-way conversion between three- and four-digit EIA capacitor codes and capacitance, with code cross-reference, unit conversion and tolerance letters. Formula: Code ABc = AB × 10^c pF (104 → 10×10⁴ = 100nF). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Below 10pF, R is the decimal point: 4R7 = 4.7pF, R47 = 0.47pF. Four-digit codes (e.g. 1001) are three significant digits plus a multiplier: 1001 = 100×10¹ pF = 1nF.

Inputs

Code ABc = AB × 10^c pF (104 → 10×10⁴ = 100nF)

Calculation model (updates with parameters)

Capacitance	100 nF
Conversion	100000 pF ｜ 100 nF ｜ 0.1 µF
Three-digit code	104
Four-digit code	1003
Tolerance code	Not marked (a trailing J/K/M means ±5/±10/±20%)

Engineering notes

Below 10pF, R is the decimal point: 4R7 = 4.7pF, R47 = 0.47pF.
Four-digit codes (e.g. 1001) are three significant digits plus a multiplier: 1001 = 100×10¹ pF = 1nF.
The code only gives capacitance; voltage rating and dielectric (X7R/C0G) come from the part number or datasheet.

FAQ

What is SMD Capacitor Code (104 = 100nF) for?: Two-way conversion between three- and four-digit EIA capacitor codes and capacitance, with code cross-reference, unit conversion and tolerance letters.
What is the formula for SMD Capacitor Code (104 = 100nF)?: Core formula: Code ABc = AB × 10^c pF (104 → 10×10⁴ = 100nF). The tool returns results instantly using this formula and the selected parameters.
What engineering notes should I keep in mind when using SMD Capacitor Code (104 = 100nF)?: Below 10pF, R is the decimal point: 4R7 = 4.7pF, R47 = 0.47pF. Four-digit codes (e.g. 1001) are three significant digits plus a multiplier: 1001 = 100×10¹ pF = 1nF. The code only gives capacitance; voltage rating and dielectric (X7R/C0G) come from the part number or datasheet.