GDP (blended) is an official, but not specifically organized dataset used by the IMF in calculating 50% of each member state's quota. Quotas reflect the relative size of an economy and is denominated by special drawing rights (SDRs). The other 50% of the Quota is made up by: "openness (30 percent), economic variability (15 percent) and international reserves (5 percent)."Quotas -- A Glossary of Terms; related to PP on IMF Quotas; October 31, 2010

Blended GDP is calculated by taking a weighted average of 60% Market Exchange Rate GDP and 40% Purchasing Power Parity GDP.

Table +GDP forecast or estimate (million $) by country, IMF 2025 CountryNo.NominalPPPBlended% Sum130,615,74330,615,74330,615,74319.88%219,398,57741,015,82428,045,47618.21%34,125,21317,714,1869,560,8026.21%45,013,5746,153,7415,469,6413.55%54,279,8286,758,2315,271,1893.42%62,540,6567,143,0934,381,6312.85%73,958,7804,454,7164,157,1542.70%83,361,5574,533,6333,830,3872.49%92,256,9104,973,3853,343,5002.17%102,543,6773,720,2713,014,3151.96%111,443,2565,015,7622,872,2581.86%121,862,7403,436,9302,492,4161.62%131,858,5723,363,4192,460,5111.60%142,283,5992,722,7952,459,2771.60%151,565,4713,766,7662,445,9891.59%161,891,3712,828,5102,266,2271.47%171,829,5081,981,6721,890,3741.23%181,268,5352,688,5201,836,5291.19%191,039,6192,019,7801,431,6830.93%201,320,6351,516,6631,399,0460.91%21884,3871,990,2681,326,7390.86%22349,2642,381,5071,162,1610.75%23558,5731,853,7711,076,6520.70%24285,0032,254,1671,072,6690.70%25484,7261,807,0501,013,6560.66%26683,3711,490,1641,006,0880.65%27475,0111,782,105997,8490.65%28356,5131,878,892965,4650.63%291,002,666881,787954,3140.62%30410,4951,671,381914,8490.59%31494,1581,477,711887,5790.58%32470,5721,478,139873,5990.57%33716,980900,497790,3870.51%34708,771811,665749,9290.49%35438,1211,189,465738,6590.48%36574,185953,943726,0880.47%37569,097935,449715,6380.46%38662,318780,115709,4370.46%39426,3831,026,500666,4300.43%40422,508919,881621,4570.40%41566,456687,271614,7820.40%42610,752567,573593,4800.39%43517,102600,452550,4420.36%44300,052912,589545,0670.35%45288,013874,599522,6470.34%46428,233594,533494,7530.32%47347,174713,032493,5170.32%48383,384652,610491,0740.32%49459,612508,718479,2540.31%50318,480653,089452,3240.29%51265,455700,586439,5070.29%52337,936535,210416,8460.27%53209,713686,940400,6040.26%54282,019466,945355,9890.23%55314,724373,246338,1330.22%56247,759460,378332,8070.22%57222,119380,191285,3480.19%58179,612431,318280,2940.18%59262,909296,970276,5330.18%60137,480473,486271,8820.18%61109,492486,830260,4270.17%62136,014403,146242,8670.16%63115,167401,480229,6920.15%64129,748332,415210,8150.14%65157,469270,239202,5770.13%66130,529304,232200,0100.13%6798,964343,101196,6190.13%68154,587257,947195,9310.13%69120,850281,690185,1860.12%70111,963294,901185,1380.12%71127,924266,031183,1670.12%7285,739309,585175,2770.11%7387,444293,631169,9190.11%7499,207266,886166,2790.11%75105,190232,242156,0110.10%7676,390270,503154,0350.10%7760,561273,200145,6170.09%78100,048213,791145,5450.09%7982,767234,340143,3960.09%80103,901198,312141,6650.09%81126,546163,491141,3240.09%8290,408199,293133,9620.09%8382,262210,388133,5120.09%84102,637169,154129,2440.08%8595,274165,234123,2580.08%8664,993187,489113,9910.07%8759,069186,259109,9450.07%8860,577173,034105,5600.07%8972,119152,608104,3150.07%9084,986129,642102,8480.07%91100,642104,465102,1710.07%9245,513182,016100,1140.07%9379,221122,98596,7270.06%9457,086142,41691,2180.06%9560,043136,37990,5770.06%9648,802151,10089,7210.06%9753,310136,15186,4460.06%9856,157131,70886,3770.06%9947,398137,45983,4220.05%10047,941125,19578,8430.05%10147,391112,22173,3230.05%10235,897121,94270,3150.05%10352,37992,73868,5230.04%10437,403114,83968,3770.04%10536,839102,66663,1700.04%10647,88082,39561,6860.04%10739,44586,29258,1840.04%10836,58788,39457,3100.04%10929,36997,75656,7240.04%11046,76367,43355,0310.04%11133,23778,65251,4030.03%11218,08095,25348,9490.03%11339,94361,50148,5660.03%11427,51575,08146,5410.03%11527,85974,40746,4780.03%11626,86672,74345,2170.03%11725,06475,23845,1340.03%11825,59172,96344,5400.03%11925,10573,02844,2740.03%12029,93962,87143,1120.03%12124,40270,42342,8100.03%12228,28063,26042,2720.03%12316,93479,53141,9730.03%12424,72662,08739,6700.03%12532,71448,16438,8940.03%12617,35269,91838,3780.02%12722,96961,02538,1910.02%12820,68963,63637,8680.02%12920,16064,10537,7380.02%13019,37764,13837,2810.02%13121,59259,82236,8840.02%13226,00251,51336,2060.02%13321,45557,05435,6950.02%13438,38631,47035,6200.02%13517,03263,08335,4520.02%13627,74544,31734,3740.02%13730,90837,37233,4940.02%13818,78353,40932,6330.02%13919,18652,65032,5720.02%14014,77158,07432,0920.02%14119,62046,65130,4320.02%14223,13738,33129,2150.02%14315,56543,42926,7110.02%14415,69542,25926,3210.02%14515,73041,49326,0350.02%14614,97542,28525,8990.02%14714,68637,63223,8640.02%14811,95340,62023,4200.02%14913,46733,54121,4970.01%15012,94432,19020,6420.01%15112,67232,16920,4710.01%15210,95132,99119,7670.01%1538,63932,62918,2350.01%15413,71123,15317,4880.01%15516,39317,33216,7690.01%1569,35321,47614,2020.01%1577,67614,81610,5320.01%1587,02514,3149,9410.01%1596,33615,1929,8780.01%1605,20115,6999,4000.01%1614,97915,1609,0510.01%1629,4248,1798,9260.01%1634,49614,6548,5590.01%1643,40814,0967,6830.00%1655,18211,2387,6040.00%1667,5596,7607,2390.00%1674,6139,9356,7420.00%1682,49710,3245,6280.00%1694,4086,4505,2250.00%1703,3007,5495,0000.00%1714,3195,3934,7490.00%1723,2976,2294,4700.00%1732,3907,3754,3840.00%1742,9156,3404,2850.00%1752,4746,6224,1330.00%1762,1257,0744,1050.00%1771,9826,3693,7370.00%1782,6595,3123,7200.00%1792,2304,2783,0490.00%1802,3403,2912,7200.00%1812,2412,8462,4830.00%1821,6133,6522,4290.00%1831,9042,1642,0080.00%1841,4582,4901,8710.00%1851,2382,3621,6880.00%1861,2481,7501,4490.00%1871,1411,7561,3870.00%1889761,5521,2060.00%1891,1191,0701,0990.00%1907481,4581,0320.00%1915878026730.00%1924954504770.00%1933214793840.00%1943413333380.00%1953022812940.00%1961721481620.00%1975861590.00%

Importance The United States Government has argued to remove China as a developing nation and common evidence used in that argument is that China is the world's largest economy under the metric PPP. China on the other hand has argued that PPP is a "flawed" metric, useful in Economics, but not a good representation of China's comprehensive national power.

Blended GDP serves as a compromise between nominal and PPP GDP and is used to affect real world economics. The higher a country's blended GDP is, the larger a country's voting power in the IMF is and as a result, international responsibility.

Blended GDP is also referenced by multiple institutions such as the World Bank, who uses Blended GDP as an example of PPP use in policy making.

Proposals Blended GDP has gone through several attempts at reform:

Think 20 has suggested to increase the share of PPP to 50% to better represent developing nations.

PIIE has looked at the theoretical from 50% of the Quota formula to 90%.

The Boston University GDP Center references scholarly debates such as once that suggest removing the "openness" metric in favor of Blended GDP.

A paper from the European Central Bank has analyzed alternative quota formulas and explicitly discusses scenarios using a “blended GDP variable” with specific weights on PPP and market-rate GDP.

References

IMF 2025 World Economic Outlook October 2025: GDP, current prices; Billions of U.S. Dollars IMF 2025 World Economic Outlook October 2025: GDP, current prices; Purchasing Power Parity; Billions of U.S. Dollars IMF: Quota Reform, For a more representative, modern IMF