4R7: this page
- Input
- 4R7
- Expected output
- 4.7
4 whole and 7 tenths: 4.7 Ω.
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smd resistor 4r7
Values below 10 ohms do not fit the three-digit rule, because it only adds zeros. For them, the marking uses the letter R in place of the decimal point, and the reading is direct: 4R7 is 4.7 Ω. Here the tool opens with 4R7 decoded and shows, step by step, how the same principle applies to 2R2, R47 and to the 4-character markings.
4 whole and 7 tenths: 4.7 Ω.
Zero whole and 47 hundredths: 0.47 Ω.
2 whole and 2 tenths: 2.2 Ω.
The zero after the R is a decimal: 1.0 Ω.
Same value as 4R7, written with one more digit.
In 4 characters, 10 whole and 0 tenths: 10 Ω.
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.
The R marks the position of the decimal point. 4R7 is 4.7 Ω, R47 is 0.47 Ω. It is not a multiplier letter, except in EIA-96 codes of two digits and a letter, where R means 0.01.
None in nominal value: both are 4.7 Ω. 4R70 has one more significant digit and appears on higher-precision parts.
From context: in a schematic or bill of materials, 47R is 47 Ω. Printed on a small EIA-96 part, it is 3.01 Ω. When in doubt, measure the part with a multimeter.
Yes, on the Value to code tab. Typing 4.7 or 4R7 returns 4R7 and 4R70, the two R formats that represent that value.
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