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Unit converter

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This tool never uploads your input.

Kitchen, luggage, and homework factors. Shipping class and NIST calibration are out of scope on purpose.

A suitcase in pounds that a form wants in kilograms, a UK listing in stone, a lab handout that still says inches. This pillar holds families of units you pick on the form. It is factor math, not a freight class calculator.

The dedicated Celsius to Fahrenheit URL exists so that H1 can stay specific. Screen units belong on CSS units. “15% more flour” is percentage.

Parcels and recipes, not customs

lb→kg on a form, inches on a US listing. Factor math, not a freight class or a NIST certificate. CSS px/rem is the CSS unit page. Currency FX is not loaded.

How to use it

  1. Pick the family (length, mass, volume, …) and the two units.
  2. Type the value. Read the other side as ordinary floating point.
  3. For recipes that list cups of a powder, prefer a scale.

Honest limits

Not customs. Not calibration. Not precious-metal troy unless the control says so.

FAQ

Do you convert cooking cups by ingredient?

A US cup of flour is not a cup of water by mass. Volume conversions here are volume. Weigh if the recipe cares.

Is this good enough for a shipping label?

Carriers use their own dimensional-weight rules. This page will not quote postage.

Where did Celsius↔Fahrenheit go?

The pair has its own URL because people search it. The formula is the same family.

CSS pixels and rem?

That is the CSS unit converter, which assumes a root font size.

Troy ounces vs avoirdupois?

If the form does not expose troy, do not use this for precious metals.

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