GrabConvert
Unit Converter
Everyday conversions without the ad-maze: ten categories — length, weight, temperature, volume, area, speed, time, energy, pressure and data — with the formula shown under every result, so you can check the math instead of trusting it.
Everyday conversions without the ad-maze: ten categories — length, weight, temperature, volume, area, speed, time, energy, pressure and data — with the formula shown under every result, so you can check the math instead of trusting it. Every factor is an exact definition (an inch is exactly 25.4 mm; a pound exactly 0.45359237 kg), temperatures use the real °C/°F/K formulas, and it all runs in your browser.
The Unit Converter on GrabConvert is the privacy extreme of the toolbox: it runs entirely in your browser, so the file is never uploaded at all — no temporary folder, no server copy, nothing to delete afterwards. Sensitive documents get edited on the device they already live on.
How to use the unit converter
- Pick a category — length, weight, temperature, volume, area, speed, time, energy, pressure or data.
- Enter a value and choose the from and to units; the result and the exact formula update live.
- Everything converts right here in your browser — nothing is uploaded or stored.
Why people pick this over other converters
- No account, ever. Most big converter sites push sign-ups and paid tiers for basic jobs. Here the tool just works.
- No watermarks and no job counters — and because it all runs on your device, there is no queue and no waiting on a server: PDFs up to 100 MB edit right in the tab.
- Private by design: this tool runs entirely in your browser — your file never leaves your device, and nothing is uploaded, stored or shared.
- Fast: this page is a fraction of the size of the ad-heavy alternatives, and the same account-free toolbox has 529 other tools when you need them.
FAQ
How accurate is this?
The math is exact-definition arithmetic shown to 12 significant digits — the same figures NIST publishes. Where a unit has two living definitions (US vs UK gallons, decimal vs binary gigabytes) both are listed and labelled, because quietly picking one is how converters lie.
Why does −40 show the same in °C and °F?
Because it is the one point where the two scales cross: −40 °C really is −40 °F. Try it in the temperature tab — it is the classic sanity check that the formula is the real one.
Is this really free?
Yes — completely. A short ad before the export keeps every tool free; no account, subscription or credits are ever required.
What happens to my file?
Nothing is uploaded at all. This tool runs entirely in your browser — your file never leaves your device, and nothing is stored or shared.
Do I need to install anything?
No. The tool is built into this page — any modern phone, tablet or computer browser works.
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