One question: what is actually slowing the charge?
WattageFit is an independent utility that turns a messy USB-C power chain into one clear answer.
Modern charging can involve a charger total rating, different per-port limits, dynamic sharing, cable ratings, USB Power Delivery profiles, PPS and device-specific intake limits. A single “100W” label rarely tells the whole story.
WattageFit keeps the calculation transparent. You can see every input, every limit and which value becomes the bottleneck. No account is required and the calculator runs in your browser.
Editorial and AI disclosure
Some code, drafting and editorial preparation may be assisted by AI tools. Device specifications and protocol claims are intended to be checked against the cited manufacturer and standards-body sources. WattageFit distinguishes published specifications from values that are modeled or estimated.
Independent by design
WattageFit is not affiliated with Apple, Google, Microsoft, Dell, Lenovo, ASUS, HP, Valve, Framework, USB-IF or any other manufacturer or standards body referenced on this site. Product names and trademarks belong to their respective owners and are used descriptively.