LED Driver Calculator

💡 Driver Configuration Tool

LED Driver Calculator

Size the correct LED driver for any application. Calculates required wattage, applies the 80% safety margin, checks thermal derating, and recommends dimming protocol.

Driver type
Constant Current (CC)
Fixed output current, variable voltage. Maintains precise current regardless of temperature or forward voltage variation.
COB LEDs · Downlights · Modules · High-power LEDs
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Constant Voltage (CV)
Fixed output voltage (12V or 24V DC), variable current. LED strips include their own current-limiting resistors.
LED strips · Flexible modules · Sign lighting · Shelf lighting
Presets
Presets
LED Load — Constant Current
Number of Fixtures (modules)
Total on this driver
Watts per Fixture (W)
Forward Current (mA)
Forward Voltage (V)
White: 2.8–3.4V · Colour: 1.8–2.4V
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LED Load — Constant Voltage
System Voltage (V)
Total Load Wattage (W)
All fixtures on this driver
Strip Density (W/m)
Auto-calculates from length
Total Length (m)
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Driver Configuration
Input Voltage
Driver Efficiency (%)
Dimming Protocol
Ambient Temperature (°C)
Driver location temp — affects derating
Recommended LED Driver
Driver utilization
—%
0%25%50%70%85%100%
UnderloadedIdeal 70–85%Overloaded
LED Load
watts
Driver Rated
watts
Input Power
watts drawn
Derated To
at temp
Recommended wiring configuration
Dimming protocol guide
Driver sizing explained
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The calculators and tools on LightingCalc.lighting are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. LightingCalc.lighting makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.