Unit Converter

Length, weight, temperature, volume, area and speed — one free converter.

FREE TOOL · WORKS OFFLINE · NO SIGN-UP
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🔁 How to Use This Unit Converter

  1. 1.Pick a category. Length, weight, temperature, volume, area or speed — the unit lists change to match.
  2. 2.Choose from and to units. Metric and US customary units sit side by side: miles next to kilometers, pounds next to kilograms.
  3. 3.Type a value. The result updates live as you type, using exact international factors — 1 inch is exactly 2.54 cm.
  4. 4.Swap with one tap. The ⇅ button reverses the direction without re-typing anything.
  5. 5.Need just one pair? Dedicated pages for km to miles, kg to pounds, °C to °F and more are linked from the tools hub.

❓ FAQ

What units can this converter handle?

Six categories: length, weight, temperature, volume, area and speed — including US units like miles, pounds, gallons and acres alongside metric units.

How accurate are the conversions?

Every conversion uses the exact international factors — for example 1 inch is exactly 2.54 cm and 1 US gallon is exactly 3.785411784 liters — and results are shown to 6 significant figures.

How do I convert a unit?

Pick a category, choose the from and to units, and type a value. The result updates as you type, and the swap button reverses the direction instantly.

Is this unit converter free?

Yes — 100% free, no sign-up. Everything runs in your browser; nothing is uploaded, saved or tracked.

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