# What does this biomass measurement mean and how to translate it to volume

This is probably a softball question but because of the nature of the term, it's difficult to Google. I am not a biologist, I am a web developer. :-)

What does this measurement mean (it is a measurement of biomass production): 50 g m-2 d-1

I believe it means 50 grams per square meter per day - but not sure why there are '-' signs in there.

And perhaps more complicated, it is possible to translate this measurement to volume (either cubic meters or ideally cubic feet)?

• Look for negative exponents to learn about the minus signs in the unit. Commented Sep 25, 2018 at 14:40
• Could you please make clear, what you want to achieve? Turn "50 grams per square meter per day" to "XY cubic feet" or to "XY cubic feet per square meter per day"? Commented Sep 25, 2018 at 14:42
• Thank you, @Marzipanherz. Appreciate the Wikipedia link. I was hoping to gather something like this: "50 grams per square meter per day" to "X grams per cubic foot" but based on Bryan's answer below, I see now this isn't a reasonable expectation. Commented Sep 25, 2018 at 15:45