Factbox: Highlights of "Costs of War" research

NEW YORK (Reuters) - Major findings from the "Costs of War" study on the financial and human costs of U.S. wars in Iraq, Afghanistan and Pakistan since 2001 by the Watson Institute for International Studies at Brown University.

FINANCIAL TOLL:

* Congressional war appropriations to Pentagon since 2001: $1.3 trillion

* Additions to Pentagon base budget: $362 billion to $652 billion

* Interest on Pentagon war appropriations: $185 billion

* Veterans' medical claims and disability: $33 billion

* War-related international aid: $74 billion

* Additions to Homeland Security base spending: $401 billion

* Projected obligations for veterans care to 2050: $589 billion to $934 billion

* Social costs to veterans and military families to date: $295 billion to $400 billion

Future spending requests:

* 2012 Pentagon war spending: $118 billion

* 2012 foreign aid: $12 billion

* 2013-2015 projected war spending: $168 billion

* 2016-2020 projected war spending: $155 billion

ESTIMATED TOTAL: $3.7 trillion to $4.4 trillion

ADDITIONAL interest payments to 2020: $1 trillion

CONSERVATIVE DEATH TOLL ESTIMATES BY WAR ZONE:

Afghanistan: 33,877

Iraq: 151,471

Pakistan: 39,127

CONSERVATIVE DEATH TOLL ESTIMATES BY CATEGORY:

U.S. military: 6,051

U.S. contractors: 2,300

Iraqi security forces: 9,922

Afghan security forces: 8,756

Pakistani security forces: 3,520

Other allied troops: 1,192

Afghan civilians: 11,700

Iraqi civilians: 125,000

Pakistani civilians and insurgents: 35,600

Afghan insurgents: 10,000

Iraqi army during U.S. invasion: 10,000

Journalists and media workers: 168

Humanitarian workers: 266

TOTAL: 224,475

(Reporting by Daniel Trotta; Editing by Cynthia Osterman)