Hull Speed Calc
Get a free API key + new tools as they ship
100 calls/day, no card, no spam. Built by one person, in public.
About Hull Speed
Working with this task no longer requires installing heavy desktop software — Hull Speed runs entirely in your browser, instantly. Processing runs locally in your browser using modern Web APIs. Nothing is uploaded, nothing is logged, and there is no quota to worry about for casual use. It pairs naturally with the other utility utilities here when you need to chain a quick workflow.
When you'd reach for Hull Speed
You're on a public or shared machine and don't want to leave traces of what you're working on.
Travelers, contractors, anyone working from a friend's computer.
Nothing is uploaded, nothing persists if you're not signed in.
You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.
Marketers and ops people whose primary tool is metered.
Stay productive without burning credits.
You're cleaning up a folder of files that accumulated over a project and need to standardize them.
Designers, writers, and developers wrapping up deliverables.
Drop each file in, copy the output, move on.
You need to handle a one-off task right before a meeting and don't have time to install anything.
Anyone working remotely on a borrowed or restricted machine.
Open the page, get the result, paste it into your doc — under a minute.
Frequently asked about Hull Speed
- Do I need to create an account to use Hull Speed?
- No. Hull Speed works without any signup. We only ask for an email if you decide to subscribe to a paid plan.
- What browsers does Hull Speed support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
- Does Hull Speed work on mobile?
- Yes, Hull Speed is fully responsive and tested on iOS Safari and Android Chrome.
- Can I use Hull Speed commercially?
- Yes. The output of Hull Speed belongs entirely to you, with no licensing restrictions.
- Is Hull Speed really free?
- Yes — Hull Speed is free for unlimited personal use, with no account required and no watermark on the output.