The length of the Battlefield game depends on the specific title:
- Battlefield 1's campaign (single-player) takes about 6½ hours to complete the main story. Completing all aspects of the game can take around 25½ hours. The multiplayer mode can take dozens of hours depending on play style, with some players investing hundreds of hours.
- Battlefield V's campaign is about 6 hours long for the main objectives and up to 34½ hours for 100% completion.
- The upcoming Battlefield 6 campaign might be just around 6 hours in length and could be subject to changes before release.
Other Battlefield titles generally have campaigns ranging from around 6 to 9 hours, with multiplayer modes offering extensive playtime beyond the campaign.
So, if you are referring to a Battlefield campaign length, expect about 6 to 7 hours for the main story in recent titles. Multiplayer playtime varies widely. If you want details on a specific Battlefield game, please specify.