An F1 race typically lasts about 90 minutes, though drivers are allotted a maximum of two hours to complete the scheduled race distance. The race distance is standardized to a minimum of 305 kilometers (approximately 190 miles), which determines the number of laps for each circuit based on its length. For example, shorter circuits have more laps, while longer circuits have fewer laps to reach that distance. The Monaco Grand Prix is an exception, with a shorter race distance of 260 kilometers (160 miles) due to its slow and technical street layout, resulting in 78 laps

. If the race cannot be completed within two hours due to factors like safety cars or red flags, it ends at the completion of the lap after the two-hour mark. There is also a three-hour window to complete the race if it is suspended temporarily. Most races finish close to the 90-minute mark under normal conditions

. In summary:

• Minimum race distance: 305 km (190 miles), except Monaco at 260 km (160 miles)
• Typical race duration: about 90 minutes
• Maximum allowed time: 2 hours of track time, with a 3-hour total window if suspended
• Number of laps varies by circuit length to meet the distance requirement