How do you estimate the size of a roll of carpet?

I found a reference posted here:

http://mathforum.org/library/drmath/view/56481.htm...

to make the calculation but I think it's more complicated than it needs to be. You could probably get a good estimate by measuring the diameter of each winding of carpet and then multiply that by pi. This will give you the circumference for each winding which will be your linear length when it's unrolled. Add up all your winding "lengths" and you'll have close to the full length. Also, you want to measure the diameter to the underside of the carpet so you don't overestimate the diameter.

If the rolls are very big and have too many windings to measure each, you could further simplify it by counting the number of windings and measuring the inner and outer windings and just evenly divide it out.

Carpet Roll Calculator

We own a carpet store. There is no easy way to be sure your remnants will fit. You need to measure your room exactly, including closets, offsets and into the doorways. Then you need to measure the carpet length and width at both ends (it may not be cut evenly). You also need to roll out the pieces to check for damage from storage (roll marks, etcetera, which you may need to steam out). Good luck.

Sorry but you need to measure the room and then the carpet, you don't want to jack it up! Remember, when measuring carpet make it 1/4 of an inch short on all sides to leave room for baseboards!

It's a problem u got there.. think there is no easy solution. Best is if u can do a Lab-Test Coeff Steel vs steel is 0,15.. coeff leather vs steel is 0,6.. ( according to Karlebo Handbok) I guess thy coeff is above 0,6..

Tape string around & around each circle. Measure string.

Unroll & measure would be the most accurrate.

well u could unroll it

or do some rather compicated geometry equations

id unroll it

?