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  • Introduction

  • 10K resistor color code: quick-reference table

  • How brown–black–orange becomes 10,000 Ω

  • Which end should you read first?

  • 4-band vs. 5-band vs. 6-band 10K resistors

  • SMD markings for a 10K resistor

  • Verify a 10K resistor with a multimeter

  • The orange-versus-red mistake: 10K or 1K?

  • Why 10K is used so often

  • Practical example: a 10K NTC thermistor divider

  • Choose the right 10K resistor

  • 10K resistor color-code FAQ

10K Resistor Color Code: 4-Band, 5-Band, SMD & Multimeter Guide

10 September 2026     By Ryan 23

Introduction


10K Resistor Color Code: 4-Band, 5-Band, SMD & Multimeter Guide

A standard 4-band 10K resistor uses the colors brown, black, orange, and gold. Brown and black make 10, orange means ×1,000, and gold shows ±5% tolerance. This gives 10,000 Ω, or 10 kΩ.


10K resistor color code: brown, black, orange, gold

10K resistor color code: quick-reference table

Resistor type
Color bands, read left to right
Calculation 
Nominal value
Tolerance
Acceptable resistance range
4-band
Brown–Black–Orange–Gold
10 × 1,000
10 kΩ
±5%
9.5–10.5 kΩ
4-band
Brown–Black–Orange–Silver
10 × 1,000
10 kΩ
±10%
9–11 kΩ
5-band
Brown–Black–Black–Red–Brown
100 × 100
10 kΩ
±1%
9.9–10.1 kΩ
6-band example
Brown–Black–Black–Red–Brown–Brown
100 × 100
10 kΩ
±1%, 100 ppm/°C
9.9–10.1 kΩ

The last color in a 6-band resistor shows the temperature coefficient (TCR). This color isn't always the same for every 10K resistor, so check the datasheet if temperature stability matters.

How brown–black–orange becomes 10,000 Ω

For a 4-band resistor, the first two bands are significant digits, the third is the multiplier, and the fourth is tolerance:

Brown = 1
Black = 0
Orange = ×1,000
Gold = ±5%

So the calculation is:
10 × 1,000 = 10,000 Ω = 10 kΩ

Gold does not affect the main resistance value. It means the actual measurement can be between 9.5 kΩ and 10.5 kΩ for a new ±5% resistor.

Which end should you read first?

Start reading from the end that is opposite the tolerance band. On most 4-band resistors, the gold or silver band is on the right and set apart by a wider gap. So, read brown, black, and orange from left to right.

If the bands are faded or the orientation is unclear:

1. Look for a gold or silver band; it cannot be a significant digit.
2. Look for the larger gap before the tolerance band.
3. Measure the component with a multimeter rather than guessing.

Do not use the body color to identify the resistor. The body can be beige, blue, green, or another color based on how it is made. Only the bands show the value.

4-band vs. 5-band vs. 6-band 10K resistors


4-band, 5-band, and 6-band 10K resistor comparison

4-band: common general-purpose 10K

Brown, black, orange, and gold is the standard 10 kΩ ±5% code. You often find it on breadboards, in hobby kits, and in pull-up or pull-down circuits and simple voltage dividers.


5-band: common precision 10K

Brown–Black–Black–Red–Brown means 100 × 100 = 10,000 Ω. The final brown band represents ±1% tolerance. A 5-band code allows three significant digits, which is why it is common on metal-film precision resistors.


Five bands don't always mean the resistor is more precise. Check the last band for tolerance, as it shows how much the value can vary.


6-band: precision plus temperature coefficient

A 6-band resistor adds a temperature-coefficient band after tolerance. For example, Brown–Black–Black–Red–Brown–Brown is 10 kΩ ±1% with a 100 ppm/°C TCR.

TCR shows how much resistance changes with temperature. A lower TCR is better for measurement, sensor circuits, and precise analog circuits.

SMD markings for a 10K resistor

Surface-mount resistors usually have printed codes instead of color bands.


Marking
Meaning
Resistance
`103`
10 followed by three zeros
10,000 Ω / 10 kΩ
`1002`
100 × 10²
10,000 Ω / 10 kΩ
`01C`
EIA-96 code: 01 = 100; C = ×100
10,000 Ω / 10 kΩ

Very small SMD resistors might not have any visible markings. If so, find the value using the BOM, schematic, assembly drawing, or by measuring the part when it is not connected to a circuit.

Verify a 10K resistor with a multimeter

Color bands show the intended value, but a multimeter checks the real value.

1. Turn off circuit power and discharge capacitors before measuring.
2. For a reliable reading, remove the resistor or lift one lead from the board. Parallel circuit paths can make an in-circuit reading appear too low.
3. Select resistance mode. Use auto-ranging, or choose the 20 kΩ range when applicable.
4. Touch one probe to each lead. Probe polarity does not matter for an ordinary resistor.
5. Compare the result with the marked tolerance.

Examples: 9.87 kΩ, 10.02 kΩ, and 10.31 kΩ are all consistent with a 10 kΩ ±5% resistor. A reading of 1.02 kΩ suggests you may have selected a brown–black–red 1 kΩ resistor instead.

If you get a reading outside the expected range, it does not always mean the resistor is bad. Check the tolerance band, how you measured, the temperature, your meter’s accuracy, and whether the resistor is still connected to other parts.

The orange-versus-red mistake: 10K or 1K?

The multiplier band changes the value by a factor of ten:


Bands
Calculation
Value
Brown–Black–Red–Gold
10 × 100
1 kΩ ±5%
Brown–Black–Orange–Gold
10 × 1,000
10 kΩ ±5%

Warm lighting, faded paint, or old parts can make red and orange look alike. If you cannot tell the multiplier band, use a meter instead of guessing by color.

Why 10K is used so often


10 kΩ is a good middle value. It is high enough to keep current low, but still low enough for many circuits to set a reliable logic level or divider voltage.

Common applications include:
  • Pull-up and pull-down resistors: a 10 kΩ pull-up on 5 V draws about 0.5 mA when pulled low.
  • Voltage dividers: pairing a fixed 10 kΩ resistor with a sensor is common when the sensor has a similar resistance near the desired operating point.
  • Transistor bias and analog feedback: 10 kΩ is a widely available value in E-series resistor ranges.
  • RC timing and filters: the value pairs conveniently with capacitors to create useful time constants.

10 kΩ is not always the best choice. Choose the value based on input leakage, noise immunity, switching speed, power use, and what the sensor or IC datasheet recommends.

Practical example: a 10K NTC thermistor divider

In a temperature-sensing divider, you often use a 10 kΩ NTC thermistor with a 10 kΩ fixed resistor. These are not the same: the NTC changes resistance with temperature, but the fixed resistor should stay near its rated value.


Correct 10K NTC thermistor voltage divider: Vout rises as the NTC resistance falls

With the NTC connected to 5 V and the fixed 10 kΩ resistor connected to ground:
Vout = 5 V × 10 kΩ / (RNTC + 10 kΩ)

At about 25°C, a 10 kΩ NTC gives a midpoint near 2.5 V. As the temperature goes up, the NTC resistance drops, and Vout goes up in this setup. If you swap the NTC and fixed resistor, the voltage direction reverses.

Choose the right 10K resistor

“10 kΩ” only tells you the resistance. You also need to choose the right tolerance, power rating, package, voltage rating, material, and TCR for your project.


Need
Typical starting point
General breadboard or pull-up/down
10 kΩ, ±5%, 0.25 W axial resistor
Sensor divider
10 kΩ, ±1% metal-film resistor
Precision measurement
10 kΩ, low-tolerance, low-TCR resistor; verify against the design requirement
Compact PCB
10 kΩ SMD resistor in a package appropriate for assembly, voltage, and power
Higher power or voltage
Calculate dissipation and check both the power and working-voltage ratings

To find power use, use P = V² / R. For example, 5 V across 10 kΩ uses only 2.5 mW. But a 10 kΩ resistor can still fail if its voltage rating, surge rating, or environment is not right, so do not pick wattage based only on resistance.

10K resistor color-code FAQ

What color is a 10K resistor?
The most common 4-band 10K resistor is brown–black–orange–gold. A ±10% version ends in silver; a common 1% 5-band version is brown–black–black–red–brown.

What does brown–black–orange mean?
Brown is 1, black is 0, and orange is a ×1,000 multiplier. Together they represent 10,000 Ω, or 10 kΩ. A fourth color specifies tolerance.

Is brown–black–red a 10K resistor?
No. Brown–black–red is 10 × 100 = 1,000 Ω, or 1 kΩ.

Can a 10K resistor measure 9.8K?
Yes. 9.8 kΩ is inside the 9.5–10.5 kΩ range of a 10 kΩ ±5% resistor and also within the range for some looser-tolerance or aged parts. For a ±1% resistor, the expected range is 9.9–10.1 kΩ.

Can I measure a resistor while it is in a circuit?
You can try, but other components can create parallel paths and distort the reading. Turn off power and lift one lead for a reliable measurement.

Is a 10K thermistor the same as a 10K fixed resistor?
No. A 10K NTC thermistor is commonly 10 kΩ at a specified reference temperature, often 25°C, and its resistance changes substantially with temperature. A fixed resistor is designed to remain near 10 kΩ within its tolerance and temperature coefficient.




About Ryan

Ryan is an Electronic Engineer at Welllinkchips with 12+ years of industry experience. He writes clear, practical resources that help engineering and procurement teams evaluate component specifications, circuit performance, reliability, lifecycle risk, and supplier considerations.

His work is intended to support informed design and purchasing decisions for active, obsolete, and hard-to-source electronic components.

Areas of focus

· Electronic circuit design and component selection

· Obsolete and end-of-life component risk

· Supplier verification and counterfeit-risk reduction

· Component alternatives and BOM continuity

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