1 Ohm Resistor Color Code (1 Ω)
A 1 ohm (1 Ω) resistor is a fundamental low-value component used for current shunt measurement, power supply current limiting, and audio speaker crossover networks. In 4-band notation, its stripes are Brown, Black, Gold (multiplier ×0.1), and Gold (±5%).
- Nominal Value
- 1 Ω (1 Ohm)
- Standard Series
- E12, E24, E48, E96
- Acceptable Measurement Range
- 0.95 Ω to 1.05 Ω (at ±5%) | 0.99 Ω to 1.01 Ω (at ±1%)
- Typical Power
- 1/2W, 1W or 2W metal oxide/wirewound
- Max Working Voltage
- 150V (low resistance, power dissipation is the limiting factor)
Resistor Color Code Calculator
Select band count and click colors below to calculate resistance and tolerance.
Select Band Colors
Click any swatch to change value
Reverse Resistor Color Code Lookup
Enter resistance value in Ohms (Ω) to determine the exact color bands.
Enter Target Resistance
Live ValidationCommon Questions About 1 Ohm Resistor Color Code (1 Ω)
Why is Gold used as a multiplier on a 1 ohm resistor?▼
In the IEC 60062 standard, Gold in the multiplier position denotes multiplication by 0.1 (10⁻¹). Brown (1) and Black (0) make "10". Multiplying by Gold (0.1) results in 10 × 0.1 = 1.0 Ω.
What is the allowable tolerance range for a 1 ohm resistor?▼
With a gold tolerance band (±5%), a 1 ohm resistor can measure between 0.95 Ω and 1.05 Ω. With a brown band (±1%), it measures between 0.99 Ω and 1.01 Ω.
Complete Resistor Color Code Chart
View the full 12-color lookup matrix covering significant figures 0–9, multipliers from 0.01 to 1G, and tolerance bands from ±0.05% to ±20%. Includes searchable values and instant CSV export.
How to Read & Calculate Resistor Bands
Learn step-by-step reading rules, standard E-series decade values (E12, E24, E96), memory mnemonics, and surface-mount (SMD) 3-digit and EIA-96 code conversion formulas.
Popular Resistor Color Code Guides & Calculators
Jump directly to pre-calculated stripe guides for common standard resistances or explore individual band systems.