Resistance Converter

Convert between ohms, kilohms, megohms, and more

Resistance Converter

From:

ℹ️

To:

ℹ️

Conversion Formula:

kΩ = Ω ÷ 1000

Similar to:

Standard resistors in electronic circuits, pull-up/down resistors

Common Resistance Values

Component	Typical Resistance	Category
Superconductor	0 Ω	Special Materials
Copper Wire (1m, 1mm²)	0.017 Ω	Conductors
Switch Contact (closed)	0.1 - 0.2 Ω	Connectors
Short Circuit	~0 Ω	Fault Condition
Fuse (normal operation)	0.1 - 1 Ω	Protection Devices
LED Current Limiting Resistor	100 - 1000 Ω	Electronic Components
Typical Resistor in Electronics	1 kΩ - 100 kΩ	Electronic Components
Pull-up/Pull-down Resistor	1 kΩ - 10 kΩ	Circuit Design
Human Body (dry skin)	10 kΩ - 100 kΩ	Biological
Human Body (wet skin)	1 kΩ - 5 kΩ	Biological
Photoresistor (dark)	~1 MΩ	Sensors
Photoresistor (light)	~100 Ω	Sensors
Insulator (e.g., Glass, Rubber)	10 MΩ - 1 TΩ	Insulators
Open Circuit	∞ Ω	Circuit State

Understanding Resistance and Conductance

Key Concepts

Resistance (R) opposes electric current flow
Conductance (G) is the reciprocal of resistance: G = 1/R
The SI unit of resistance is the ohm (Ω)
The SI unit of conductance is the siemens (S)
Conductors have low resistance, high conductance
Insulators have high resistance, low conductance

Ohm's Law & Related Formulas

V = I × R (Voltage = Current × Resistance)
I = V ÷ R (Current = Voltage ÷ Resistance)
R = V ÷ I (Resistance = Voltage ÷ Current)
P = I² × R (Power = Current² × Resistance)
For resistors in series: R_total = R₁ + R₂ + ...
For resistors in parallel: 1/R_total = 1/R₁ + 1/R₂ + ...

Resistance Factors

Resistance depends on:

Material: Conductors (metals) have low resistance, insulators (rubber, glass) have high resistance
Length: Resistance increases with length (R ∝ L)
Cross-sectional area: Resistance decreases with area (R ∝ 1/A)
Temperature: For most metals, resistance increases with temperature

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Resistance Visualization

μΩmΩ1Ω10Ω100Ω1kΩ10kΩ100kΩ1MΩGΩ

1.00 kΩ

Medium Resistance

Standard Resistor Color Bands:

Brown

Black

Brown

±5% Tolerance

Common Applications:

Standard resistors, LEDs with current limiters

Examples at This Resistance Level:

Standard Resistor

Human Skin (wet)

Ohm's Law Relations:

R = V/I (Resistance = Voltage / Current)

V = I×R (Voltage = Current × Resistance)

I = V/R (Current = Voltage / Resistance)

P = I²×R (Power = Current² × Resistance)

Note: Resistance (R) opposes current flow in an electrical circuit.

Siemens (S) is the unit of conductance, where S = 1/Ω

Resistor Color Code

Color	Value	Multiplier
Black	0	×1
Brown	1	×10
Red	2	×100
Orange	3	×1k
Yellow	4	×10k
Green	5	×100k
Blue	6	×1M
Violet	7	×10M
Gray	8	×100M
White	9	×1G

For a 4-band resistor: 1st & 2nd bands are digits, 3rd is multiplier, 4th is tolerance. For a 5-band resistor: 1st, 2nd & 3rd bands are digits, 4th is multiplier, 5th is tolerance.

Practical Applications

Electronic Circuits:

Resistors control current flow, divide voltage, and create timing circuits.

Measurement:

Resistance measurements help diagnose electrical problems and component failures.

Sensors:

Resistance changes can detect temperature (thermistors), light (photoresistors), and strain (strain gauges).

Heating Elements:

Controlled resistance produces heat in toasters, electric heaters, and soldering irons.

Mobile tip: Swipe left or right on the unit dropdown to quickly change units, or use the arrow buttons

About the Resistance Converter

Convert between ohms, kilohms, megohms, and more All conversions run instantly in your browser and nothing you enter is sent to a server.

Common Conversion Formulas

From	To	Formula
Ohms (Ω)	Kilohms (kΩ)	kΩ = Ω / 1,000
Ohms (Ω)	Megohms (MΩ)	MΩ = Ω / 1,000,000
Resistance (R)	Voltage (V), Current (I)	R = V / I (Ohm's Law)

Resistance Converter