MathTools

Convert any unit instantly

Unit Converter — MathTools

Enter a value, pick units, and read the conversion instantly — all in your browser.

How to convert · tips

Pick a category from the rail (length, mass, temperature, …). Enter a number in From, choose units on both sides, and the To value updates instantly. Use the swap button (or Alt+S) to reverse the units.

  • Temperature uses affine formulas (°C ↔ °F ↔ K), not a simple scale factor—the formula line under the panels shows the exact relation.
  • Copy puts the converted result on your clipboard. Popular conversions below jump to common pairs.
  • Everything runs locally in your browser. Precision is high for everyday use; for legal/metrology work, verify against your jurisdiction’s standards.
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