"Official" Russian MoD puts the figure at :8.7 Million.
The figures published by Russian Ministry of Defense have been accepted by most historians outside Russia. However, the official figure of 8.7 million military deaths has been disputed by some Russian historians who believe that the number of dead and missing POWs is not correct and new research is necessary to determine actual (much higher).
German losses against the Russians were just as horrific.
German military losses 5,533,000
Total military and civilian deaths - 6,600,000-8,800,000
We did send some Land Lease material - but near as much as the Brits for example.
(http://www.historynet.com/did-russia-really-go-it-alone-how-lend-lease-helped-the-soviets-defeat-the-germans.htm)
Money quote - "That the Soviet victories of late 1941 were won with Soviet blood and largely with Soviet weapons is beyond dispute."
Lemd-Lease meant that Americans would not die in Russia like the poor bastards sent & left to die by the US Administration under Woodrow Wilson. ( The last American soldiers left Siberia on April 1, 1920. During their 19 months in Siberia, 189 soldiers of the American Expeditionary Force Siberia died from all causes. As a comparison, the smaller American North Russia Expeditionary Force experienced 235 deaths from all causes during their 9 months of fighting near Arkhangelsk) See https://en.wikipedia.org/wiki/American_Expeditionary_Force_Siberia for a short version.
This is one reason (of the legion of reasons) that W. Wilson is undoubtedly the worst President the US ever suffered thru.
The war didn’t start turning around for the Russians until the end of 43 and ‘44 after the Allies opened The Second Front. We did more then ‘some Lend/lease’’ to the Russians. To say otherwise is to totally ignore the convoys to Murmansk aka “The Atlantic Convoys’’. The Russians did not posses a strategic air force that pounded German war industries and populations centers as the Allies did. Neither did they have a navy that destroyed the German U boat threat in the Atlantic and put the Imperial Japanese navy at the bottom of the Pacific.