Tent Capacity and Comfort Calculator

Tent manufacturers rate their tents by maximum capacity — meaning the number of sleeping bags that physically fit, with no room for gear. Real-world comfortable capacity is typically 1–2 persons less.

Manufacturer vs real-world capacity:

• Rated 2-person: comfortably sleeps 1–2 (with gear: 1)
• Rated 3-person: comfortably sleeps 2–3 (with gear: 2)
• Rated 4-person: comfortably sleeps 3–4 (with gear: 3)
• Rated 6-person: comfortably sleeps 4–5 (with gear: 4)

Floor space per person:

• Minimum (just a sleeping bag): 0.6 m × 2.0 m = 1.2 m²
• Comfortable (person + bag + pillow): 0.75 m × 2.0 m = 1.5 m²
• With gear (pack, shoes, wet kit): 0.9 m × 2.2 m = ~2.0 m²

Worked example: A tent with 4.8 m² floor area, rated for 3 persons:

• Minimum capacity: 4.8 / 1.2 = 4 persons (bodies only)
• Comfortable: 4.8 / 1.5 = 3.2 persons ≈ 3 persons
• With full gear: 4.8 / 2.0 = 2.4 persons ≈ 2 persons

Vestibule: A large vestibule (covered porch area) dramatically improves livability by storing wet gear, muddy boots, and cooking equipment outside the sleeping area. Look for 1.0+ m² of vestibule per person on multi-night trips.

Height matters: Dome tents and tunnel tents have sloped walls that reduce usable floor area. The manufacturer’s floor area is measured wall-to-wall at ground level — usable space is typically 15–25% less.