3.73 PSI drop

Velocity: 3.63 ft/s

Reynolds number: 21013

Friction factor: 0.0262 (Blasius)

Darcy-Weisbach with Blasius friction factor for smooth pipes. Add 10-30% for fittings.

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About Pressure Drop

Pressure Drop is a free, browser-based utility designed to make this task as quick and frictionless as possible. Built to be the kind of tool you bookmark and use weekly: no surprises between visits, no degraded free tier, and a UI that gets out of the way. Like everything else in the utility collection, it is free, ad-light, and works on mobile as well as desktop.

When you'd reach for Pressure Drop

  • 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.

  • 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.

Frequently asked about Pressure Drop

What browsers does Pressure Drop support?
Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
Does Pressure Drop work on mobile?
Yes, Pressure Drop is fully responsive and tested on iOS Safari and Android Chrome.
Is Pressure Drop really free?
Yes — Pressure Drop is free for unlimited personal use, with no account required and no watermark on the output.
Do I need to create an account to use Pressure Drop?
No. Pressure Drop works without any signup. We only ask for an email if you decide to subscribe to a paid plan.
Will Pressure Drop change my original file?
Never. Pressure Drop only reads your input file and produces a new output file.

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