Work it all out before you order
Enter the model and the run length — we work out the wattage, the rolls, the transformer and where you need to feed power from both ends.
Strip Info
Pick a model or enter custom data
25%
25% is recommended to extend PSU life and avoid full-load operation
Results
Choose a model and enter length to calculate
Total wattage (with safety)
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Current
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Recommended size
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Recommended power supplies
Pick the type that suits your install environment
Usage tips
- • Safety margin 25% — professional standard — extends PSU life and reduces heat buildup
- • Strips longer than 5-10m — use dual feed (power from both ends) to reduce voltage drop
- • Outdoor use — choose Waterproof or RainX models with IP67
- • 220V AC (Neon Flex 220V) — connects directly to mains — no PSU needed
Wire & Strip Details
Calculate voltage drop along your wire run
One-way distance — round-trip resistance (×2) is calculated automatically
Results
Choose a strip and fill in the details to calculate
Voltage at end of strip
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Voltage drop (ΔV)
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% drop
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What to do when drop exceeds 5%
- • Dual feed — power the strip from both ends; effective wire length halves, drop quarters
- • Thicker wire — upgrade to 1.5mm² or 2.5mm² to reduce wire resistance
- • Shorter runs — split into multiple shorter strips, each with its own PSU
- • Higher voltage — switch to 24V or 48V; current (and drop) drop by half or a quarter
- • Right PSU size — check the PSU Calculator tab to make sure you have the right power supply