Convert avoirdupois weights: grains, drams, ounces, pounds, stones, US and UK hundredweight, short and long tons, grams and kilograms. Enter your values; the result updates as you type, with the method shown below.
About this calculator
This converter changes a avoirdupois weight value from one unit to another instantly. It covers grains, drams, ounces, pounds, stones, US and UK hundredweights, and short and long tons.
Type a value, choose the unit you have and the unit you want. The result updates as you type, and the other common units are listed too.
When to use it
- Reading old recipes or trade documents.
- Converting freight weights.
- Converting a recipe, a plan or a product sheet.
- Checking a figure in a foreign unit.
How to read the result
The avoirdupois pound is 453.59237 g with 16 ounces. A US hundredweight is 100 lb but a UK one is 112 lb; a US short ton is 2,000 lb and a UK long ton 2,240 lb.
Results are rounded for display; the conversion factors are exact or standard values.
Mistakes to avoid
- Mixing US and UK hundredweights or tons.
- Typing the value in the wrong unit field.
- Rounding too early in a chain of calculations.
Formula
1 lb = 16 oz = 256 dr = 7,000 gr
Worked example
1 lb = 16 oz = 7,000 grains = 453.59 g.
Frequently asked questions
Avoirdupois or troy?
Avoirdupois is the everyday system; troy is for precious metals.
Short or long ton?
US short ton = 2,000 lb; UK long ton = 2,240 lb.
Hundredweight?
100 lb in the US, 112 lb in the UK.
How many ounces in a pound?
16.
Are the factors exact?
Yes for defined units; others use standard international values.
Can I convert negative values?
Yes where it makes sense.
Related calculators
Results are estimates for information only. Check important figures with a professional.