Measure & Convert
Weight Converter
Convert weight and mass between kilograms, grams, pounds, ounces, metric tonnes, and US tons.
- Free to use
- Runs in your browser
- Level A · Standard formula
- Last reviewed 2026-08-16
How to use this calculator
Enter the requested values and select Calculate. The result is computed locally in your browser using the formula shown on this page.
Understanding the result
Convert common metric and US customary weight or mass units.
Calculation method
Convert source units to kilograms, then kilograms to the selected destination unit..
Calculator guide
About the Weight Converter
Convert common metric and US customary weight or mass units.
What to keep in mind
- A US ton is 2,000 pounds.
- A metric tonne is 1,000 kilograms.
- Results may be rounded for display.
Formula & methodology
Convert source units to kilograms, then kilograms to the selected destination unit.
Review standard: Level A · Standard formula. How calculator reviews work.CalculateMeasure performs the arithmetic locally in your browser. The displayed result depends on the values and units you enter.
Authoritative reference
NIST publishes mass conversion factors, including pounds and short tons to kilograms.
NIST Guide to the SI — Conversion Factors ↗
Source links support the formula or conversion methodology. CalculateMeasure remains responsible for its implementation and testing.
Frequently asked questions
What does this calculator calculate?
Convert common metric and US customary weight or mass units.
Can I use the result for an important decision?
Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.
Does CalculateMeasure store the values I enter?
This calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.