Follow the same three steps the tool publishes.
Step 1. Enter coil ohms. Read the resistance printed on the WINDBAR coil or pod, or measure a rebuildable coil with an ohm meter if you actually have rebuildable gear. Do not type a number you saw on a forum screenshot.
Step 2. Pick inhale style. MTL is a tighter mouth-to-lung draw. RDL is restricted direct lung. DL is more open direct lung. The WINDBAR wattage calculator uses that choice to suggest a starting band. Style is a user input, not a medical category.
Step 3. Optional: tap WINDBAR D95 or WINDBAR D91 4.4V to load the educational pocket-device starting point, then stay on this site.
Formula used on the tool:
P = V² / R I = V / R
P is power in watts. V is voltage. R is resistance in ohms. I is current in amps. If you enter 4.4 V and 1.0 Ω, the pure math is P = 19.36 W and I = 4.4 A. That math is why the page insists packaging wattage wins. D91’s campaign also shows an engineering power range of 6.5–10 W that is not treated here as a locked certificate. If 19.36 W is above the insert, you do not use 19.36 W. The calculator is there to show the relationship, not to override the box.
Worked educational examples (math only):
- 3.7 V and 1.0 Ω → P = 13.69 W, I = 3.7 A
- 4.4 V and 1.0 Ω → P = 19.36 W, I = 4.4 A
- 3.7 V and 0.4 Ω → P = 34.225 W, I = 9.25 A
The last row is an RDL-style example on the preset list, not a WINDBAR D91 setting. Do not put 0.4 Ω into a sealed pocket device because a table row exists.
After you have a band, look at the coil print again. If the print is lower, use the print. If the print is missing, stop. Unknown resistance is not a license to pick a watt number from a blog.
