RV floorplan and square footage

I recently shared this edited floorplan of our coach:

2017 40SP floorplan with our mods

Here it is again with annotations for the dimensions of each area of the coach, according to my measurements:

2017 40SP floorplan with sizing

Basic stats from the spec sheet:

  • Exterior length: 40’ 11”
  • Exterior height: 12’ 7”
  • Exterior width: 101”
  • Interior height: 84”
  • Interior width: 96”
  • Fresh water: 90 gal
  • Black water: 50 gal
  • Grey water: 70 gal
  • Fuel tank: 150 gal

My measurements of the interior, where depth refers to front-to-back, and width is side-to-side, in terms of the coach orientation:

  • Cockpit: 65” d (windscreen to driver-side slide)
  • Driver-side front slide: 23” w x 166“ d (72” for kitchen counter + 94” for seating and cabinets)
  • Passenger-side front slide: 32” w x 189“ d (72” for TV + 74” for dining + 43” for fridge & pantry)
  • Half bath: 34” w x 39” d
  • Driver-side bedroom slide: 18” w x 75” d
  • Passenger-side bedroom slide: 28” w x 81” d
  • Bedroom total: 94” d (on bed side)
  • Bathroom: 62” d (34” for shower; 29” d x 27” w for washer & dryer)
  • Closet: 58” w x 24” d

One reason for measuring it was to calculate the square footage. So let’s give that a go (if you spot any errors, please let me know!).

The interior length is approximately 39’. So multiplying by the interior width of 8’, ignoring the slides, we get 312 square feet. So that’s the size with the slides in.

The front driver-side slide is 166 x 23”, i.e. 13.83 x 1.91’, which is 26.4 square feet.

The front passenger-side slide is 189 x 32”, i.e. 15.75 x 2.66′, which is 41.9 square feet.

The bedroom driver-side slide is 75 x 18”, i.e. 6.25 x 1.5’, which is 9.4 square feet.

The bedroom passenger-side slide is 81 x 28”, i.e. 6.75 x 2.33’, which is 20.4 square feet.

So the four slides add 100 square feet of space when extended, bringing the total to 412 square feet.

That’s about the size of a two-car garage. Pretty tiny compared to an average house, but comparable to an apartment in New York. And, of course, our home travels all around the country.