Dimmer Compatibility Calculator

Check whether your dimmer switch is compatible with your LED bulbs or drivers. Enter your LED load, dimmer type, and any symptoms you are experiencing — get a compatibility verdict, cause diagnosis, and recommended dimmer specification.

Existing or planned dimmer
Maximum load printed on dimmer faceplate
Check spec sheet — often 10-50W
LED bulbs / drivers on this circuit
LED bulb / driver type Count W each
Symptoms you are experiencing (tick all that apply)

Please add at least one LED bulb or driver.

✅
Compatible
0W
Total LED load
0%
Load factor
0W
Min load req.
0W
Headroom
Load as % of dimmer rating
Min load80% targetMax rated
Recommended dimmer specification
Smart dimmer options
Total LED load
Dimmer type
Load vs dimmer rating
Minimum load check
Recommended dimmer
Wiring note
Symptoms detected
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The calculators and tools on Formula Factory 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. Formula Factory 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.