| Sport | Capacity Rio 2016 | Capacity Tokyo 2020 |
| Aquatics (Artistic Swimming) | 5300 | 15000 |
| Aquatics (Diving) | 5300 | 15000 |
| Aquatics (Marathon Swimming) | 5000 | 5500 |
| Aquatics (Swimming) | 18000 | 15000 |
| Aquatics (Water Polo) 1 | 18000 | 4700 |
| Aquatics (Water Polo) 2 | 5300 | – |
| Archery | 1800 | 5600 |
| Athletics | 60000 | 68000 |
| Athletics (Marathon) | 18000 | TBA |
| Athletics (Race Walk) | ? | 700 |
| Badminton | 6500 | 7200 |
| Basketball 1 | 16000 | 21000 |
| Basketball 2 | 5000 | – |
| BMX Cycling | 7500 | 6600 |
| Boxing | 9000 | TBA |
| Canoe (Slalom) | 8000 | 7500 |
| Canoe (Sprint) | 30000 | 12800 |
| Ceremonies | 78600 | 68000 |
| Cycling (Mountain Bike) | 27500 | 11500 |
| Cycling (Road – Time Trial) | ? | 22000 |
| Cycling (Road) | 5000 | 22000 |
| Cycling (Track) | 5800 | 3600 |
| Equestrian | 35200 | 9300 + 16000 |
| Fencing | 10000 | 8000 |
| Football 1 | 78600 | 68000 |
| Football 2 | 60000 | 48000 |
| Football 3 | 69900 | 41000 |
| Football 4 | 76000 | 49000 |
| Football 5 | 44500 | 40000 |
| Football 6 | 50000 | 64000 |
| Football 7 | 48000 | 72000 |
| Golf | 25000 | 25000 |
| Gymnastics | 12000 | 12000 |
| Handball | 12000 | 10200 |
| Hockey 1 | 10000 | 15000 |
| Hockey 2 | 5000 | – |
| Judo | 10000 | 11000 |
| Modern Pentathlon | 15000 + 5000 + 2000 | 48000 + 7200 |
| Rowing | 30000 | 16000 |
| Rugby | 15000 | 48000 |
| Sailing | 10000 | 3600 |
| Shooting | 7250 | 6800 |
| Table Tennis | 6500 | 7000 |
| Taekwondo | 10000 | 10000 |
| Tennis | 19750 | 19900 |
| Triathlon | 5000 | 5500 |
| Volleyball | 11800 | 15000 |
| Volleyball (Beach) | 12000 | 12000 |
| Weightlifting | 6500 | 5000 |
| Wrestling | 10000 | 10000 |
