Motor Efficiency Calc

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100 calls/day, no card, no spam. Built by one person, in public.

About Motor Eff

When you need this task done in seconds, Motor Eff delivers a clean, focused interface without the friction of a generic tool. The goal was to keep the path from "open the page" to "get the result" as short as possible. No mandatory account, no cookie wall, no upsell at every step. It is one of about a hundred utility tools that share the same philosophy: do one thing, do it well, get out of your way.

When you'd reach for Motor Eff

  • 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 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'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 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 Motor Eff

Can I use Motor Eff commercially?
Yes. The output of Motor Eff belongs entirely to you, with no licensing restrictions.
Is Motor Eff really free?
Yes — Motor Eff is free for unlimited personal use, with no account required and no watermark on the output.
Are my files uploaded to a server when I use Motor Eff?
Motor Eff processes everything in your browser using local APIs. Your files never leave your device.
Do I need to create an account to use Motor Eff?
No. Motor Eff works without any signup. We only ask for an email if you decide to subscribe to a paid plan.
What browsers does Motor Eff support?
Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.

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