Have you ever looked at something and immediately knew how much it weighed? Probably not, and it becomes increasingly more difficult if you need to imagine a weight—say, 20 grams. It’s the same as 0.705479 ounces, but using everyday objects as references is much easier to gauge 20 grams without a scale.

100 grams might sound like a lot, especially if you’re not accustomed to the metric system. In reality, 100 grams is the same as 3.5274 ounces or 0.220462 pounds. Doesn’t sound like much, does it? Despite this relatively light weight, getting a feel for 100 grams in your hand can be impossible. That is, unless you have something that serves as a reference!

If you’re having trouble figuring out how heavy 7 ounces is, all you need is a scale. But if you don’t have one, knowing 7 ounces is the same as nearly half a pound or 198.447 grams won’t help you much. What you can do is use everyday objects as references, as long as you know how much those objects weigh.

It may seem like an impossible task to gauge the weight of something without a scale? For instance, how heavy is 10 grams actually? It’s the same as 0.35274 ounces, but that doesn’t help much. To get a better idea of how heavy 10 grams is, you can use everyday objects as references.

If you’re in a part of the world that measures weight in ounces and pounds, then you’ll probably have a difficult time figuring out what 15 kilograms is. There’s a simple formula for that—1 kilogram is the same as 2.20462 pounds. So, 15 kilograms is equal to 33.0693 pounds! Something we Standard Imperial users have in common with metric users is not knowing what 15 kilograms feels like.