Hundredweight/ˈhʌndrədweɪt/ Definition 1 of 2Pro Tip 1/3US Specific Understand that 'hundredweight' in the US is specifically 100 pounds, unlike in the UK. The bag of cement is one hundredweight. Pro Tip 2/3Trade and Commerce 'Hundredweight' is often used in trading goods like grain, livestock, or produce in the US. We traded five hundredweight of wheat. Pro Tip 3/3Shipping Term In the US, shipping costs might be estimated by hundredweight, especially for heavy items. The shipping rate is $2 per hundredweight.