LED Strip Calculator
Calculate the right power supply, wire gauge, and setup for your LED strip project. Avoid dimming, overheating, and other common issues.
1Strip Specifications
Efficient, compact. Best for accent lighting.
12V is more common but limited to ~5m runs
2Power Requirements
Total Power
24.0W
Current Draw
2.0A
Recommended Power Supply
Includes 20% headroom for safe operation
Strip Details
Wiring Tips
- ✓Use proper gauge wire (22 AWG) for this current
- ✓Keep power supply in ventilated area
- ✓Use aluminum channels for heat dissipation
LED Strip Types Explained
LED strips come in different chip sizes and configurations. The numbers (2835, 5050, etc.) refer to the LED chip dimensions in millimeters. Each type has different brightness, power consumption, and use cases.
Comparing LED Strip Types
| Type | Chip Size | Best For | Power |
|---|---|---|---|
| SMD 2835 | 2.8 × 3.5mm | Accent, under-cabinet, cove | Low |
| SMD 5050 | 5.0 × 5.0mm | RGB, general lighting | Medium |
| SMD 5630 | 5.6 × 3.0mm | Task lighting, bright areas | High |
| COB | Continuous | Premium, dot-free look | Medium |
Understanding Voltage Drop
12V Strips
Maximum run: ~5 meters before noticeable dimming at the end. Requires power injection for longer runs.
24V Strips
Maximum run: ~10 meters. Better for longer installations but slightly more expensive.
Power Supply Sizing
Calculate Total Watts
Watts/meter × Total meters = Total watts needed
Add 20% Headroom
Never run PSU at 100%. Add 20% for longevity and safety.
Calculate Amps
Total Watts ÷ Voltage = Amps needed
Choose Wire Gauge
Higher amps need thicker wire to prevent voltage loss.
Wire Gauge Guide (AWG)
| Current (Amps) | Wire Gauge | Max Distance |
|---|---|---|
| 0-3A | 22 AWG | 3m / 10ft |
| 3-5A | 20 AWG | 5m / 16ft |
| 5-8A | 18 AWG | 7m / 23ft |
| 8-13A | 16 AWG | 10m / 33ft |
| 13-20A | 14 AWG | 15m / 50ft |
Installation Best Practices
- 1
Use Aluminum Channels
They dissipate heat and extend LED life significantly. Essential for high-density strips.
- 2
Power from Both Ends
For long runs, connect power to both ends to ensure even brightness throughout.
- 3
Clean Surface Before Mounting
Use isopropyl alcohol to clean mounting surfaces for best adhesive bond.
- 4
Cut Only at Marked Points
LED strips have cut marks every few LEDs. Cutting elsewhere will damage the strip.