The following table is meant to provide some notion of various costs associated with waging World War I. The unit values are based on dollar figures and must be taken as estimates, in some cases very crude ones. The real interest lies in the names on the list and their comparative contributions to the war effort.
| Allied Powers | Cost in Dollars in 1914-18 |
| United States | 22,600,000,000 |
| Great Britain | 35,300,000,000 |
| France | 24,300,000,000 |
| Russia | 22,300,000,000 |
| Italy | 12,400,000,000 |
| Belgium | 1,150,000,000 |
| Romania | 1,600,000,000 |
| Japan | 40,000,000 |
| Serbia | 400,000,000 |
| Greece | 270,000,000 |
| Canada | 1,600,000,000 |
| Australia | 1,400,000,000 |
| New Zealand | 380,000,000 |
| India | 601,000,000 |
| South Africa | 300,000,000 |
| British Colonies | 125,000,000 |
| Others | 500,000,000 |
| Total of all costs | 125,266,000,000 |
| Central Powers | Cost in Dollars in 1914-18 |
| Germany | 38,000,000,000 |
| Austria-Hungary | 21,000,000,000 |
| Turkey | 1,400,000,000 |
| Bulgaria | 815,000,000 |
| Total of all costs | 61,215,000,000 |
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