This model for the UK which I referenced above estimates 80% will be infected.
https://www.medrxiv.org/content/10.1101/2020.02.12.20022566v1.full.pdf
The UK is modelling on 80% infected, 50% of infected symptomatic, 4% requiring hospital admission and 1% requiring high level care. Noticeably no one is predicting mortality, but one can assume it is closely related to the number needing high level care. The most critical issue is slowing the spread so that the epidemic occurs over a long period. Given a peak predicted in 4 months, ie June / July and a 1 million infected at peak, this suggests 40,000 people needing admission with pneumonia at the peak (average length of stay 1 week?). On a symmetric model the epidemic should be over by November. So for the UK about 2 million excess hospital admission over 8 months.
For comparison there 200,000 cases of pneumonia annually in the UK and 12,000 deaths. There are about 18,000 emergency admissions daily so over 8 months covid 19 would add 8,000 admissions a day, but obviously at peak this will be much higher how high depends on the shape of the curve. The model suggests that actually most of the burden will be over 60 days, suggesting more like 30,000 excess admissions / day.