Tent Size Calculator
Plan the perfect basecamp by factoring in sleeping pads, pets, and even rainy-day hangouts inside your tent.
Roughly 15 sq ft per adult sleeper (pad + wiggle room).
Large duffels or rolling luggage stored inside the tent.
Small packs, camera bags, or hydration packs kept indoors.
Allow extra space for dog bed or crate if pets sleep inside.
Folding chairs used during storms or lounge time inside.
Recommended Tent Size
Floor space
46.2 sq ft
Medium car-camping tent (3P–4P, 50–70 sq ft)
Peak height tip
Peak height 40–48″ is sufficient for sitting up.
How to Use This Calculator
Count people and gear
Include everyone sleeping inside plus bulky items (luggage, pets, camp furniture). Each person needs ~15 sq ft to sleep.
Decide on comfort level
Backpackers cram in tight; car campers enjoy extra space. Add buffer if you’ll hang out inside during bad weather.
Consider ceiling height
Tall campers or those using cots should choose tents with higher peak height and near-vertical walls (cabin tents).
Formula
Total Sq Ft = Σ (Item Count × Footprint)
Add 10% if expecting rainy-day tent time
Add 5 sq ft per person when using cots
Example: 2 people + 2 duffels + rain buffer → 2×15 + 2×4 = 38 sq ft × 1.1 ≈ 42 sq ft (opt for a 3P/4P tent).
Tent Shopping Tips
Choosing the right tent means balancing weight, space, and weather protection. Use this estimate to narrow options and avoid sardine sleeping.
- Check vestibule space for muddy boots or extra gear.
- Three-season tents handle spring–fall; four-season gear suits winter or alpine trips.
- Look for full-coverage rainflies and bathtub floors for wet climates.
- Use a footprint/groundsheet to protect the tent floor and extend lifespan.
Frequently Asked Questions
Why do tent labels overstate capacity?
Manufacturer capacities assume backpacking conditions (tight sleeping mats). Upsize by 1–2 people for comfort camping.
What if I have inflatable mattresses?
Measure their footprint and add that to your gear total—queen air mattresses can be 25 sq ft each.
Does tent shape matter?
Dome tents shed wind but taper at the sides; cabin tents maximize interior space but can catch wind. Match shape to your campsite conditions.
How important is headroom?
Essential for changing clothes or hanging out inside. Backpackers may accept low peak heights to save weight; car campers often prefer 6 ft+ height.