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Resistor Color Code Calculator

Color Codes from Resistor Values

This resistor colour code computer converts a resistor value to resistor color code and supports 3, 4, and 5-ring resistors. If you are getting into electronics and cannot retrieve the resistor color codes, then this calculator is for you. It will perform a unproblematic check if the calculated resistance that y'all need for your circuit matches one of the standard resistance values in the E3–E192 ranges and show what the resistor of this value looks like.

Example: Calculate the color code of a ±20% 2.seven kohm resistor.

Resistance

R

Please enter a value in the range of 0,1 Ω — 999 MΩ or 0 Ω for a null-ohm link.

Tolerance and number of color bands

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Non-standard {0} value
Standard in other series

The nearest lower standard resistor in {0}

The nearest higher standard resistor in {0}

Resistor Values from Color Codes

Number of Bands:

3 4 5

1st digit

2nd digit

tertiary digit

Multiplier

Tolerance, ±

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Definitions and Calculations

Resistor and Resistance

A resistor is a passive electrical component that creates electrical resistance in electronic circuits. Resistors can be found in almost all electrical circuits. They are used for various purposes, for example, to limit current, as voltage dividers, to provide bias to active circuit elements, to terminate manual lines, in resistor-capacitor circuits as a timing component... The list is endless.

Precision decade resistor box

The electric resistance of a resistor or an electrical usher is a measure out of the opposition to the flow of electric current. The SI unit for resistance is the ohm. Any material shows some resistance except superconductors, which have zero resistance. More data about resistance, resistivity and conductance.

Resistor Tolerance

Of course, information technology is possible to make a resistor with very precise resistance, however, it volition exist insanely expensive. Besides, high precision resistors are relatively rarely used. At that place are very expensive resistors used for measurements. Hither nosotros will talk about inexpensive resistors used in electrical circuits, which do not crave loftier precision. In many cases, ±twenty% of precision is enough. For a 1 kilohm resistor, this means that any resistor with a value in the range of 800 ohms to 1200 ohms is acceptable. For some critical components, the tolerance tin can be specified as ±ane% or even ±0.05%. At the same fourth dimension, it is difficult to find 20% resistors today — they were common at the beginning of the transistor radio era. 5% and 1% resistors are very mutual today. They were relatively expensive in the past, but non anymore.

Comparison of 0.i W SMD resistors in 1608 (1.half-dozen × 0.8 mm) packages with a ten W one Ω ceramic resistor

Power Dissipation

When an electric current passes through a resistor, it is heated and the electrical energy is converted into the thermal free energy, which information technology dissipates. This free energy must be dissipated by the resistor without excessive raising its temperature. And non only its temperature simply as well the temperature of components surrounding this resistor. The power consumed by a resistor is calculated equally

where V in volts is the voltage beyond the resistor of resistance R in ohms and I is the current in amps flowing through it. The power that a resistor can safely dissipate for an indefinite menstruation of time without degrading its performance is called the resistor power rating or resistor wattage rating. Generally, the larger the resistor package, the more power it can dissipate. Resistors of different power ratings are produced, most normally from 0.01 W to hundreds of watts. Carbon resistors are commonly produced in power ratings of 0.125 to 2 watts.

1/viii W, 1/4 Westward, 1/2 W and ane Due west color-coded resistors in a computer ability supply

Preferred Values

Although information technology is possible to produce resistors of any value, it is more than useful to make a express number of components, peculiarly considering that whatever manufactured resistor is subject to a certain tolerance. More precision resistor's costs are much higher than their less precise counterparts. Mutual logic dictates to choose a logarithmic scale of values so that all values are equally spaced on a logarithmic scale and lucifer the tolerance of the range. For case, for a tolerance of ±ten%, it makes sense to cover a decade (the interval from ane to 10, 10 to 100, etc.) in 12 steps: one.0, 1.2, one.five, i.8, 2.ii, 2.7, 3.three, three.9, 4.seven, 5.6, six.8, 8.ii, and then x, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82. These values are called preferred values and are standardized as E serial of preferred numbers, which are used non just for resistors, but also for capacitors, inductors, and Zener diodes. Each E-series (E3, E6, E12, E24, E48, E96, and E192) subdivides a decade into 3, 6, 12, 24, 48, 96 and 192 steps. Note that the E3 series is obsolete and is almost not used anymore.

Lists of E Series Values

A mod 10 W 8.6 ohms ceramic resistor (higher up) and a VZR 2 Due west 3.3 kilohms resistor manufactured in the Soviet Union in 1969

E6 values (xx% tolerance):

1,0; 1,5; two,two; 3,3; four,7; 6,8.

E12 values (10% tolerance):

i,0; 1,2; i,5; ane,8; 2,two; 2,7; iii,iii; 3,9; four,seven; 5,6; 6,8; eight,2.

E24 values (5% tolerance):

1,0; 1,1; 1,2; 1,3; one,5; 1,half dozen; 1,8; two,0; two,2; 2,4; 2,7; three,0; 3,three; 3,6; 3,9; 4,3; 4,7; 5,1; 5,vi; 6,2; half-dozen,viii; 7,5; 8,2; 9,i.

E48 values (ii% tolerance):

ane,00; i,05; 1,10; i,15; 1,21; 1,27; ane,33; 1,twoscore; 1,47; 1,54; 1,62; ane,69; one,78; 1,87; 1,96; 2,05; 2,15; 2,26; 2,37; 2,49; ii,61; two,74; 2,87; 3,01; 3,xvi; 3,32; three,48; 3,65; 3,83; 4,02; 4,22; 4,42; 4,64; iv,87; 5,11; five,36; five,62; 5,xc; 6,19; 6,49; 6,81; 7,15; 7,50; 7,87; 8,25; 8,66; 9,09; nine,53.

E96 values (1% tolerance):

1,00; i,02; ane,05; 1,07; 1,10; i,thirteen; one,15; 1,xviii; i,21; 1,24; 1,27; 1,30; i,33; 1,37; one,xl; 1,43; 1,47; 1,50; 1,54; ane,58; 1,62; 1,65; i,69; one,74; ane,78; ane,82; 1,87; 1,91; 1,96; 2,00; 2,05; 2,10; 2,fifteen; ii,21; 2,26; 2,32; 2,37; ii,43; 2,49; 2,55; 2,61; ii,67; 2,74; ii,80; 2,87; two,94; 3,01; 3,09; 3,16; 3,24; 3,32; iii,twoscore; 3,48; iii,57; iii,65; 3,74; three,83; iii,92; iv,02; iv,12; 4,22; 4,32; four,42; 4,53; 4,64; 4,75; 4,87; 4,99; 5,eleven; 5,23; v,36; 5,49; 5,62; v,76; v,xc; 6,04; 6,19; 6,34; vi,49; 6,65; 6,81; 6,98; 7,15; seven,32; 7,fifty; 7,68; 7,87; viii,06; 8,25; 8,45; 8,66; viii,87; ix,09; 9,31; 9,53; 9,76.

E192 values (0.v% and lower tolerance):

i,00; one,01; one,02; one,04; 1,05; i,06; 1,07; 1,09; ane,ten; i,11; 1,13; one,14; ane,15; 1,17; ane,18; ane,20; ane,21; 1,23; 1,24; 1,26; 1,27; ane,29; 1,30; 1,32; 1,33; 1,35; 1,37; 1,38; 1,40; 1,42; one,43; one,45; 1,47; ane,49; 1,50; 1,52; 1,54; 1,56; i,58; 1,lx; 1,62; 1,64; 1,65; one,67; 1,69; one,72; ane,74; 1,76; ane,78; 1,80; i,82; one,84; 1,87; ane,89; 1,91; i,93; 1,96; 1,98; two,00; ii,03; 2,05; two,08; two,ten; 2,13; 2,15; ii,18; 2,21; 2,23; 2,26; 2,29; 2,32; two,34; 2,37; ii,40; ii,43; 2,46; two,49; two,52; two,55; two,58; 2,61; 2,64; two,67; 2,71; 2,74; 2,77; 2,80; 2,84; 2,87; two,91; ii,94; 2,98; 3,01; 3,05; iii,09; three,12; 3,16; three,20; three,24; iii,28; 3,32; 3,36; iii,xl; 3,44; 3,48; iii,52; 3,57; 3,61; 3,65; iii,lxx; iii,74; 3,79; 3,83; 3,88; 3,92; 3,97; 4,02; 4,07; 4,12; iv,17; 4,22; iv,27; 4,32; 4,37; 4,42; 4,48; iv,53; 4,59; 4,64; 4,70; 4,75; 4,81; four,87; iv,93; 4,99; 5,05; 5,11; v,17; five,23; 5,xxx; 5,36; 5,42; 5,49; 5,56; 5,62; 5,69; 5,76; 5,83; five,xc; 5,97; vi,04; 6,12; vi,19; 6,26; 6,34; 6,42; vi,49; 6,57; half-dozen,65; half dozen,73; 6,81; six,xc; 6,98; 7,06; 7,15; 7,23; 7,32; 7,41; 7,50; vii,59; vii,68; seven,77; 7,87; 7,96; 8,06; 8,sixteen; viii,25; 8,35; 8,45; 8,56; 8,66; 8,76; viii,87; 8,98; 9,09; 9,20; nine,31; 9,42; 9,53; ix,65; 9,76; 9,88.

Resistor color coding

Resistor Mark

Big resistors, equally shown in the motion picture, are usually marked with numbers and messages and their reading is like shooting fish in a barrel. However, the value cannot be easily printed fifty-fifty using modernistic printing technology on modest resistors (and other electronic components), especially if they are cylindrical. Therefore, during the past 100 years color bands were used for marker components. The electronic colour code for this purpose was introduced in early 1920. Color codes are used not just for resistors but also for capacitors, diodes, inductors, and other electronic components.

Resistor Color Code

Up to six color bands are used for resistors. The almost common is a 4-band color code, in which the commencement and second bands stand for the first and second significant digit of the resistance value, the third ring is the decimal multiplier and the fourth band indicates the tolerance. There is a small, sometimes poorly distinguishable gap between the third and fourth band that helps distinguish the left and right side of the symmetrical component. 20% resistors are usually marked with only three bands — they exercise non have a tolerance ring. Their bands mean digit, digit, multiplier.

For two% or more precision resistors, 5 or more than bands are used and the get-go three bands represent the resistance value. The concluding band in 6-band marker represents the temperature coefficient in ppm/K (parts per million per kelvin). The picture above represents the colour marking principle.

Bands are read from left to correct. They are usually grouped together shut to the left finish. If there is a visible gap betwixt the concluding colour band and other bands, then it shows the right side of the resistor. Also, silver or gold bands (if any) are always on the right side. When you lot determined the value from the color bands, compare it to the preferred value charts. If information technology is non there, so endeavour to read from another end. Note that in this figurer color mark is made according to the international standard IEC 60062:2016.

Click or tap the links to view examples of color marking:

10 kohms ±20%, 12 ohms ±20%, xv MΩ ±1%, eighteen MΩ ±2%, 22 kohms ±10%, 27 ohms ±v%, 33 kohms ±5%, 39 MΩ ±0.5%, 0.47 ohms ±0.25%, 0.56 ohms ±0.i%, 68 ohms ±0.05%, 0.82 ohms ±20%

Numerical Marker

Numerical values are printed on the surface mount resistors (SMT — surface-mount technology or SMD — surface-mount device) of larger sizes and on larger axial-lead resistors. Considering the infinite for marker is very pocket-sized, it is sometimes not piece of cake to read and empathise the resistor value. The marking is more often than not used for servicing because during production the resistors are fed into the surface mounting machines in tapes that are suitably marked. Many, specially small SMD resistors are non marked at all and in one case they are dropped from tapes, the only style to discover their resistance is measurement.

39 × x⁰ = 39 Ω 0.one W SMD resistors in 1608 (i.6 × 0.viii mm) packages

Several systems are used for marking: three or 4 digits, two digits with a letter, three digits with a letter, the RKM code, and other systems. If you come across only three digits, they represent the significant figures and the third is a multiplier. For example, 103 on an SMD resistor represents 10 × 10³ = 10 kΩ.

The iv-digit system is used for high-tolerance resistors, for example for E96 or E192 series resistors. For example, 2743 = 274 × 10³ = 274 kΩ.

For smaller resistors, another system tin can be used. For example, for E96 series two digits plus one alphabetic character is used. This system can save one grapheme comparison to the 4-digit system. That is considering E96 contains less than 100 values, which tin be represented by two numbers if they are numbered sequentially, that is 01 — 100, 02 — 102, 03 — 105, etc. A letter represents the multiplier. Note that manufacturers often use their own systems. Therefore, the best way to determine the resistance is e'er measuring with a multimeter.

In the RKM Lawmaking, also chosen "R notation" a letter representing the resistance unit is placed instead of a decimal separator, which may non be printed reliably or just disappear on components or duplicated documents. Besides this method allows using fewer characters. For example, R22 or E22 means 0.22 ohm, 2K7 means 2.seven kiloohms and 1M5 ways i.5 megohms.

Measuring a 3.3 MΩ 0.5 W resistor using an oscilloscope-multimeter

Resistance Measurement

Resistance tin be measured with an analog (with a needle) or digital ohmmeter or multimeter with resistance measurement role. To measure resistance, connect the probes to the resistor leads and read the value. Information technology is sometimes possible to mensurate resistance without removing a resistor from the excursion. However, you must disconnect the circuit power and discharge all capacitors earlier connecting the multimeter to the circuit existence measured.

A multimeter can be used not only for measuring the resistance of resistors but also contact resistance of various switching components like relay or switches. For case, you lot tin make up one's mind if a mouse push needs replacement past means of measuring its resistance preferably with an analog multimeter or a digital meter with an analog bar display. The analog bar graph is useful when performing diagnostic or making adjustments. The bar graph acts as a needle in an analog meter and tin can show fluctuating resistance when a digital brandish with blinking digits would exist completely useless. With this kind of meter, you tin easily find many intermittent problems, for instance, bouncing contacts of a vibrating relay.

In conclusion, at that place are several examples:

Resistor 2,7 kΩ ±5%: Blood-red, violet, red, gold

Resistor 100 kΩ ±5%: brown, black, yellow, gold.

Resistor 220 kΩ ±5%: blood-red, red, xanthous, aureate.

Resistor 330 kΩ ±v%: orange, orange, yellow, gold.

Resistor 390 kΩ ±v%: orange, white, yellow, gold.

Resistor 430 kΩ ±five%: yellowish, orange, xanthous, gilt

Resistor 470 kΩ ±v%: yellow, violet, yellow, aureate

Resistor 510 kΩ ±five%: green, chocolate-brown, xanthous, gold

Resistor 560 kΩ ±5%: light-green, blue, yellow, gold

Resistor 750 kΩ ±five%: violet, light-green, yellow, gold

Resistor 910 kΩ ±5%: white, brownish, yellow, aureate

Red Black Red Gold Resistor,

Source: https://www.translatorscafe.com/unit-converter/id-ID/calculator/resistor-color-code/

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