Mass and weight converter
Convert mass units while keeping ordinary ounces and troy ounces distinct.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
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Your result
Complete the inputs to see your result.
How it works
- Converted value = Value × f₁ ÷ f₂; SI: kg
- Worked example: 1 lb = 0.45359237 kg; 1 Metric tonne = 1000 kg
- Supported input limits: Value: 0 ≤ x ≤ 1000000000000
Assumptions and limitations
Conversion uses the named unit definition and the same physical dimension. The international foot, avoirdupois mass, US liquid/imperial volumes, thermochemical calories and international-table BTU are distinct conventions. Mechanical horsepower is 745.6998715822702 W; metric horsepower is 735.49875 W. Pressure conversion preserves its gauge/absolute reference. Temperature differences use scale factors without offsets.
Sources
- NIST — conversion factor conventions Sources reviewed: 2026-10-06
- NIST — conversion factor table B.8 Sources reviewed: 2026-10-06
