820 Ω resistor colour code (820R)

E12 series

820 Ω reads as Grey · Red · Brown in bands. With ±5% it may sit anywhere from 779 Ω to 861 Ω.

Five bands

The first two bands are digits; the third is how many zeros follow. The gold band at the end is the ±5% tolerance.

Value: 820 Ω
4k7 notation: 820R
Four bands: Grey · Red · Brown · Gold
Five bands: Grey · Red · Black · Black · Gold
Multiplier: ×10¹
Tolerance: ±5%
Actual range: 779 – 861 Ω
Series: E12 series · E24 series

Which end to start from · The tolerance band sits a little apart from the rest. Start from the crowded end. If you can see gold or silver, that band is the last one.

Same decade

The same twenty-four values repeat with a different number of zeros — 47 Ω, 470 Ω and 4.7 kΩ all start with the same two colours.

100 Ω 110 Ω 120 Ω 130 Ω 150 Ω 160 Ω 180 Ω 200 Ω 220 Ω 240 Ω 270 Ω 300 Ω 330 Ω 360 Ω 390 Ω 430 Ω 470 Ω 510 Ω 560 Ω 620 Ω 680 Ω 750 Ω 910 Ω

Nearby values

620 Ω620RBlue · Red · Brown 680 Ω680RBlue · Grey · Brown 750 Ω750RViolet · Green · Brown 910 Ω910RWhite · Brown · Brown 1 kΩ1kBrown · Black · Red 1.1 kΩ1k1Brown · Brown · Red

How to read this

Colours are digits: black 0, brown 1, red 2, orange 3, yellow 4, green 5, blue 6, violet 7, grey 8, white 9.
The third band counts the zeros. Yellow, violet, red means 47 with two zeros — 4.7 kΩ.
A five-band resistor reads three digits, so its multiplier band drops by one step.
The tolerance band sits slightly apart, which is how you know which end is the back.

Frequently asked questions

Q. What are the colour bands for 820 Ω?

Grey · Red · Brown · Gold in four bands, or Grey · Red · Black · Black · Gold in five.

Q. How is 820 Ω read?

The first two digits are 82, followed by 1 zeros, giving 820 Ω. In short form, 820R.

Q. What is the real value once tolerance is counted?

At ±5% it lies between 779 Ω and 861 Ω.

Q. Is 820 Ω a common value?

It belongs to E12. Most parts boxes carry it.