Weight / Mass Converter
Quick answer
Convert mass by multiplying by the ratio between units (e.g., lb to kg uses the same factor everywhere).
For a related estimate, see Length Converter.
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Core logic
kg = lb × 0.45359237 · g = oz × 28.349523125 (avoirdupois). Stick to one ounce definition when comparing.
Explore further: Area Unit Converter · Volume Unit Converter
Mass conversions use fixed ratios between kilograms, pounds, ounces, and related units. Use it for shipping weights, recipes scaled by mass, and gym or lab measurements.
How to use this calculator
- Set inputs: Enter mass in the unit you have.
- Pick units: Switch display to the unit you need.
- Verify: Round only at the end for reporting.
Real-world examples
- Example: 5 lb × 0.453592 ≈ 2.268 kg.
- Round-trip check: Convert the result back to the starting unit—if you do not land near your original value within rounding, confirm you picked the right direction (e.g., A→B vs B→A).
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Short explanation
Distinguish mass from “weight” in everyday language; the tool follows standard conversion factors.
FAQ
Are weight and mass unit converter results exact?
Fixed definitions (e.g., inches to cm) are exact. Values that depend on standards or rounding may differ slightly by display precision.
Why pick this hub instead of a single pair page?
Pair pages target one direction and one jump; this weight and mass unit converter hub matches the multi-unit converter card where you can switch units freely.
How accurate is this conversion?
It uses the standard fixed conversion factor for these units. Results are exact to the precision shown, aside from normal floating-point rounding.