Hot Water Recirculation
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100 calls/day, no card, no spam. Built by one person, in public.
About Recirc Calc
Recirc Calc solves a specific problem that comes up daily for anyone dealing with this task: doing it once, fast, without an account. 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 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 Recirc Calc
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'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 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 Recirc Calc
- Are my files uploaded to a server when I use Recirc Calc?
- Recirc Calc processes everything in your browser using local APIs. Your files never leave your device.
- Is Recirc Calc really free?
- Yes — Recirc Calc is free for unlimited personal use, with no account required and no watermark on the output.
- Can I use Recirc Calc commercially?
- Yes. The output of Recirc Calc belongs entirely to you, with no licensing restrictions.
- Will Recirc Calc change my original file?
- Never. Recirc Calc only reads your input file and produces a new output file.
- What browsers does Recirc Calc support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
