| Conference | Deadline | Date | Country |
| 1.53rd HELSINKI World Congress on Advances in Science, Engineering & Technology (HWASET-26) scheduled on April 27-29, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 2.49th HELSINKI International Conference on “Chemical, Biological & Environmental Engineering” (HCBEE-26) scheduled on April 27-29, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 3.35th HELSINKI World Congress on Mining, Material and Metallurgical Engineering (WCM3E-26) scheduled on April 27-29, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 4.53rd HELSINKI International Conference on “Marketing, Education, Social Sciences & Humanities” (HMESH-26) scheduled on April 27-29, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 5.50th HELSINKI International Conference on Emerging Technologies (HICET-26) April 27-29, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 6.51st HELSINKI World Conference on Sustainable Agriculture, Biodiversity & Public Health (SABPH-26) April 27-30, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 7.51st HELSINKI International Conference on “Economics, Business & Management Studies” (HEBMS-26) April 27-29, 2026 Helsinki (Finland) | 2026-04-01 | 2026-04-27 | Finland |
| 8.2026 International Conference on Multi-scale Artificial Intelligence (MAI 2026) | 2026-04-01 | 2026-04-24 | China |
| 9.24th BARCELONA World Conference on Advances in Electrical, Electronics, and Computing Systems (AE2CS-26) scheduled on April 20-22, 2026 Barcelona (Spain) | 2026-04-01 | 2026-04-20 | Spain |
| 10.24th BARCELONA World Conference on Advances in Electrical, Electronics, and Computing Systems (AE2CS-26) April 20-22, 2026 Barcelona (Spain) | 2026-04-01 | 2026-04-20 | Spain |
| 11.23rd BARCELONA International Conference on Agricultural Technology & Food Security (BATFS-26) scheduled on April 20-22, 2026 Barcelona (Spain) | 2026-04-01 | 2026-04-20 | Spain |
| 12.19th BARCELONA World Conference on Innovations in Mechanics, Composites & Manufacturing Technology (IMCMT-26) scheduled on April 20-22, 2026 Barcelona (Spain) | 2026-04-01 | 2026-04-20 | Spain |
| 13.31st BARCELONA World Congress on Innovations in Educational Technology (BEdTech-26) scheduled on April 20-22, 2026 Barcelona (Spain) | 2026-04-01 | 2026-04-20 | Spain |
| 14.40th BARCELONA World Congress on Science, Engineering & Technology (NCPDT-26) | 2026-04-01 | 2026-04-20 | Spain |
| 15.51st BARCELONA Global Congress on Ecological Agriculture, Biodiversity & Public Health (BEABPH-26) | 2026-04-01 | 2026-04-20 | Spain |
| 16.53rd BARCELONA International Congress on Studies in Literature, Languages & Communication (BICLLC-26) | 2026-04-01 | 2026-04-20 | Spain |
| 17.44th BANGKOK World Congress on “Marketing & Business Studies ” (WCMBS-25) | 2026-04-01 | 2026-04-20 | Spain |
| 18.68th BARCELONA World Congress on Green Chemical Engineering, Energy & Environmental Sustainability (GCE2S-26) | 2026-04-01 | 2026-04-20 | Spain |
| 19.61st BARCELONA Global Congress on “Chemical, Biological, Environmental & Medical Sciences” (BCBEM-26) scheduled on April 20-22, 2026 Barcelona (Spain) | 2026-04-01 | 2026-04-20 | Spain |
| 20.59th BARCELONA World Congress on Humanities & Social Sciences (WCHSS-26) | 2026-04-01 | 2026-04-20 | Spain |
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