2.7 ohm resistor color code

The color code for 2.7 Ω is red, violet, gold, gold on a 4-band resistor (±5%) and red, violet, black, silver, brown on a 5-band resistor (±1%).

Color bands

4 bands, ±5%Red, Violet, Gold, Gold

5 bands, ±1%Red, Violet, Black, Silver, Brown

6 bands, ±1%, 100 ppm/KRed, Violet, Black, Silver, Brown, Brown

Open 2.7 Ω in the color code calculator →

Actual value by tolerance

Tolerance	Band	Minimum	Maximum
±1%	Brown	2.673 Ω	2.727 Ω
±2%	Red	2.646 Ω	2.754 Ω
±5%	Gold	2.565 Ω	2.835 Ω
±10%	Silver	2.43 Ω	2.97 Ω

SMD and printed codes

SMD, 3 digits	`2R7`
SMD, 4 digits	`2R70`
SMD, EIA-96	not used for this value
Letter code (IEC 60062)	`2R7`

Current and power at common voltages

Voltage	Current	Power	Resistor rating
3.3 V	1.22 A	4.03 W	10 W
5 V	1.85 A	9.26 W	over 10 W
9 V	3.33 A	30 W	over 10 W
12 V	4.44 A	53.3 W	over 10 W
24 V	8.89 A	213 W	over 10 W

As an LED resistor

Current through one LED in series with 2.7 Ω:

Supply	Red LED (2.0 V)	White or blue LED (3.2 V)
3.3 V	481 mA	37 mA
5 V	1110 mA	667 mA
12 V	3700 mA	3260 mA

Above 20 mA: too much for a common 5 mm LED.

LED Resistor Calculator →

Standard series

2.7 Ω is a standard value in the E12, E24 series, so it comes in almost every resistor kit.

Nearby values

← 2.2 Ω 3.3 Ω →

Same first two colors, different multiplier:

27 Ω 270 Ω 2.7 kΩ 27 kΩ 270 kΩ 2.7 MΩ

Frequently asked questions

What are the colors of a 2.7 Ω resistor?

On a 4-band resistor: red, violet, gold, gold. On a 5-band resistor: red, violet, black, silver, brown.

What is the SMD code for 2.7 Ω?

2R7 on 3-digit resistors and 2R70 on 4-digit (1%) resistors.

How much current flows through a 2.7 Ω resistor at 5 V?

1.85 A, dissipating 9.26 W: more than a standard resistor can handle.

Which resistors get mixed up with 2.7 Ω?

red, violet, silver, gold is 270 mΩ and red, violet, black, gold is 27 Ω: only the third band changes, so check it carefully.