Surge vs continuous watts: what matters
Learn the difference between surge, continuous and how manufacturers rate gear.
Quick take
Use these quick rules to get a reliable answer, then fine‑tune with the calculators linked below.
How to use the calculator
- Open the calculator linked below.
- Enter the numbers that match your setup.
- Use our rules of thumb to sanity-check the result.
Rules of thumb
- Size to the higher of continuous vs surge.
- Add 10–30% headroom for comfort and longevity.
- Mind 240V split‑phase needs before buying.