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Resistance calculator

One of the most comprehensive and advanced resistor marking calculators on the web.

Color markings

In this standard, resistor values are represented by colored bands. The order and colors of the bands define significant digits, the multiplier, tolerance and, for six-band resistors, the temperature coefficient.

Select the resistor type and click the appropriate colors to calculate its resistance.

1 2 3 4 5 6
  none none none none none none
             
             
             
             
             
             
             
             
             
             
             
             
Click the appropriate colors to see the result.

MIL standard

In the MIL marking standard, the resistor value is encoded using three or four digits. The first two or three digits represent the significant value, while the last digit represents the multiplier.

For example, code 103 means 10 kΩ, while 2211 means 2.21 kΩ.

Examples (E3-E24):
473 2R2 R20 824 333J
47 kΩ 2.2 Ω 0.20 Ω 820 kΩ 33 kΩ
Examples (E48-E192):
2211 4R75 30R0F 2211F 5102
2.21 kΩ 4.75 Ω 30 Ω 2.21 kΩ 51 kΩ
Decoder:
Click the resistor and enter the symbols you can read.

IEC standard

In the IEC marking standard, resistor values are written using the actual value and an appropriate unit symbol. For example, 470 Ω is marked as 470R, while 220 kΩ is marked as 220K.

Decimal values are represented by moving the unit symbol between the significant digits. For example, 0.10 Ω is marked as R10, while 5.1 MΩ is marked as 5M1.

An additional letter can be used to specify tolerance, such as J, K, F or M.

Simple examples:
470K 220R 3R3 R33 5M1
470 kΩ 220 Ω 3.3 Ω 0.33 Ω 5.1 MΩ
Extended examples:
22RJ 47K5F 30R0F 5W1RJ
22 Ω 5% 47.5 kΩ 1% 30 Ω 1% 1 Ω 5% 5 W
Decoder:
Click the resistor and enter the symbols you can read.

EIA-96 standard

In the EIA-96 marking standard, the first two digits represent an index into the E96 preferred value series, while the final letter represents the multiplier.

For example, 02 represents the second value in the E96 series.

EIA-96 markings are primarily used for precision resistors with a tolerance of ±1%.

Examples:
01A 12C 33B 75B 96A
100 Ω 13 kΩ 2.16 kΩ 5.9 kΩ 976 Ω
Decoder:
Click the resistor and enter the symbols you can read.