Decode the tiny output label on your USB-C charger
Paste the output text printed on the charger. WattageFit extracts fixed voltage/current profiles and variable PPS or AVS ranges, calculates volts × amps, and turns the label into a usable power ceiling instead of making you read every line by hand.
What does your charger actually list?
The parser runs in your browser. Your pasted label is not uploaded anywhere.
Paste the OUTPUT section
Optional reality check
The label is a menu of electrical profiles
For each profile, watts are voltage × current. A line such as 20V ⎓ 5A is therefore 100W. A variable range such as PPS 3.3–11V ⎓ 5A can reach 55W at the top of that printed range.
Fixed profiles
Common USB-PD labels list several fixed combinations such as 5V/3A, 9V/3A, 15V/3A and 20V/5A. The device negotiates a mutually supported mode; the largest printed line is only a ceiling.
PPS and AVS ranges
Variable-voltage ranges are different from a single fixed mode. The decoder keeps them separate and calculates the maximum wattage implied by the top of the printed voltage range.
Above 100W
USB Power Delivery 3.1 Extended Power Range added 28V, 36V and 48V fixed levels, enabling up to 140W, 180W and 240W. A compatible high-power cable and device are still required.
What this catches that a big “140W” badge can hide
A headline charger rating may describe the whole brick. The tiny output table tells you which voltage/current profiles are actually printed for a port. On multi-port models you must also find the simultaneous allocation table — for example 100W + 40W — because plugging in a second device can change the available power.
Standards references
USB-IF — USB Charger / Power Delivery ↗ explains Power Delivery up to 240W and the 28V, 36V and 48V EPR levels. USB-IF — USB-C cable and charger power logos ↗ documents the current high-level power-marking program.
This decoder recognizes label patterns; it cannot test cable e-markers, observe a live PD negotiation or determine product certification.
FAQ
What does 5V ⎓ 3A mean?
It is a listed 5-volt, 3-amp output profile. Multiplying 5 × 3 gives a 15W electrical ceiling for that profile.
Does 20V ⎓ 5A mean my laptop will always charge at 100W?
No. It means that printed profile is capable of 100W. The device must request a compatible mode, the selected port must offer it in the current port combination, and the cable must support the path.
Can the decoder prove a charger supports PPS or EPR?
It reports clues explicitly present in the pasted label and flags high-voltage/high-power profiles. Treat the result as a label interpretation and verify the charger's manufacturer specification for protocol support.
Why is a 100W cable option called legacy/common?
Older 5A e-marked USB-C cables commonly carried 100W-era labeling. Current USB-IF certified cable power logos use 60W and 240W classes, so the decoder keeps 100W as a practical legacy input rather than presenting it as the current certification mark.
Decoded the brick? Check the rest of the chain.
Use the main checker to compare the charger's port ceiling with your cable, device target, shared load and required protocol.