Doing some internet maths of my own according to available reports from Western and Ukrainian sources. In June 2022, Ukraine reported it had 1 million troops in its army.
Ukraine is massing a million-strong fighting force equipped with western weapons to recover its southern territory from Russia, the nation’s defence minister h
www.thetimes.co.uk
In December 2023, Zelensky said the army requested an additional half a million troops to keep its ranks filled.
Ukraine's military leadership proposed to mobilize 450,000-500,000 additional conscripts, President Volodymyr Zelensky said on Dec. 19, noting that the plan has yet to address several key issues before he can support it.
kyivindependent.com
It would be reasonable to assume ~350K casualties based on those numbers in a span of 1 year and 3 months.
Ukraine is suffering 700 killed or wounded a day on average.