Wood chips to compost volume reduction

I'm starting a new garden area over what is currently about 70% sod and 30% a long-abandoned garden plot. I'm currently accumulating a pile of wood chips and I'll put chickens in the area until they turn the chips into compost. I have a rough idea of how much compost I need in the end, but I don't know how much wood it will take to yield that volume of compost. I'm guessing that 1 yard of wood chips might result in 0.5 yards of compost. That's just a guess though. Anyone with experience doing this have a sense for what volume of compost I might expect per yard of chips?

The pile of wood chips, horse manure, and a bit of fish offal has already shrunk by about a third. The young chickens are working it now. Hopefully this produces enough compost and magically turns the area into an amazing garden.

About 1/3 to 1/2 reduction.  

Don’t economize.  Do what you have to do to have plenty.  You aren’t making fine wine.

Jim Brewer wrote:About 1/3 to 1/2 reduction.  

Don’t economize.  Do what you have to do to have plenty.  You aren’t making fine wine.

Thanks for the estimate. You're absolutely right that it's not fine wine and more is always better. But my time is finite and collecting the materials is costly to my time. I'm aspiring to be efficient. I would still rather overdo it by a bit than fall short though, as you suggest.

The pile has already shrunk by about 1/3, so I think it'll be less that 1/2 by the time it's completely composted. Now that I've been watching it for a few months, I'm guessing the final volume will be about 1/3 of the original volume (reduction of 2/3).

There is usually a 25% mass reduction (from 100lbs to 75%). But the volume has a much bigger reduction of 50%.