Ask 1000 publishers and you'll get 1000 answers. It's so variable - could be $0.50, could be $50 a day.

So much depends on your user base and traffic quality on top of what advertisers are paying in your niche atm.

Spend time collecting/reviewing/digesting your site traffic/ad data and you'll begin to see your site's potential - or lack thereof. There's no formula for figuring this out.

I have a pair of 1000 traffic sites and, on any given day, one makes $0 to $2.50 and the other $2 to $10. Very different niches and audiences and earnings very wildly day to day.

Another variable is how many pages each visitor views. The permutations are endless. Suck it and see is the only answer.

I know you are looking for at least one data point - here's one -

1000 visitors = $6

Factors -
Website born 2003. 2013 was peak year.

Went HTTPS
-- Losing links like crazy

Hit HARD on the May 18 update
-- Losing traffic like crazy

Losing insta-clawbacks (when checked (every 10 minutes, for a morning)
-- See nice click, gone 10 minutes later

Like the folks said above, a kajillion factors.
.

A general interest website receiving US/UK/CA/AU traffic might receive $2-3 per 1000 visitors.

A website appealing to certain niches and receiving US/UK/CA/AU traffic might receive $4-10 per 1000 visitors.

A website receiving traffic from India, China, Russia, etc. might receive $0.20-$1.00 per 1000 visitors.

Also bear in mind that for each 1,000 visitors, 200-300 might be blocking your ads.

And then there is the percentage break between bot/human traffic. The less trafficked the site generally the higher the bot percentage breakout.

Some hosts do fair to good bot blocking, very few are great many do little to none. A lot of webdevs are in bot denial when complaining about traffic.

It depends on so many things. Are these impressions or clicks is the big one. If no clicks then you will pretty much get nothing. If all 1000 people click then you'll get a lot.