Weight Converter
Free weight converter. Instantly convert between kilograms, pounds (lb), stones, ounces, and metric/US tons. Includes presets, exact factors, and FAQ.
Full original guide (expanded)
Weight Converter
Convert quickly between kilograms, pounds, stones, ounces and tons. Type a value in any field and all the others will update instantly.
Quick presets:
Common weight conversions
| From | To | Multiply by |
|---|---|---|
| kg | lb | 2.20462262185 |
| lb | kg | 0.45359237 |
| kg | oz | 35.27396195 |
| stone | kg | 6.35029318 |
| metric ton | kg | 1000 |
| US short ton | kg | 907.18474 |
How this weight converter works
We use kilograms (kg) as the internal base unit. Every time you enter a value, it is converted to kg, then from kg to all the other units using exact factors.
Key factors
- 1 lb = 0.45359237 kg
- 1 oz = 0.028349523125 kg
- 1 stone = 6.35029318 kg
- 1 metric ton = 1000 kg
- 1 US short ton = 907.18474 kg
FAQ
- Why so many decimals? We keep NIST-style exactness. Round to 2–3 decimals for everyday use.
- Which ton should I use? For international/metric use “metric ton”; for US freight use “US short ton”.
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
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Formula (extracted text)
Key factors 1 lb = 0.45359237 kg 1 oz = 0.028349523125 kg 1 stone = 6.35029318 kg 1 metric ton = 1000 kg 1 US short ton = 907.18474 kg
Variables and units
- No variables provided in audit spec.
Sources (authoritative):
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - NIST — SI units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/metric-si/si-units
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.