Colour code and SMD marking
Read resistors without knowing the table by heart: pick the colour bands, type in the SMD marking or find the standard value and its bands for a value.
Colour code and SMD marking
Bands from left to right, starting with the one further from the edge.
Or the other way round: type in the marking of an SMD resistor or look up a value.
How the page calculates
- Colour bands: digits black 0, brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, grey 8, white 9
- SMD with three digits: two digits times 10 to the power of the third (473 = 47 kฮฉ)
- SMD with four digits: three digits times 10 to the power of the fourth
- R marks the decimal point (4R7 = 4.7 ฮฉ)
- EIA-96: two digits for the value from the E96 series, one letter as multiplier (01C = 10 kฮฉ)
When you look up a value, the calculator gives the nearest standard value from the E24 series, plus the band colours and the three-digit SMD marking.