Gallons Per Hour
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100 calls/day, no card, no spam. Built by one person, in public.
About GPH Calc
Working with this task no longer requires installing heavy desktop software — GPH Calc runs entirely in your browser, instantly. 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 pairs naturally with the other utility utilities here when you need to chain a quick workflow.
When you'd reach for GPH 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 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.
Frequently asked about GPH Calc
- Is GPH Calc really free?
- Yes — GPH Calc is free for unlimited personal use, with no account required and no watermark on the output.
- What browsers does GPH Calc support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
- Will GPH Calc change my original file?
- Never. GPH Calc only reads your input file and produces a new output file.
- Can I use GPH Calc commercially?
- Yes. The output of GPH Calc belongs entirely to you, with no licensing restrictions.
- Are my files uploaded to a server when I use GPH Calc?
- GPH Calc processes everything in your browser using local APIs. Your files never leave your device.
