7/12 Roof Pitch

A 7/12 roof rises 7 inches for every 12 inches of horizontal run: 30.26°, a 58.3% slope, and 15.8% more surface than its footprint.

7/12 pitch at a glance
Measure	7/12 value
Angle	30.26°
Slope percent	58.3%
Rise per foot of run	7 in
Pitch multiplier (area factor)	1.1577
Hip/valley factor	1.5298
Common rafter length per foot of run	13-7/8"
Plumb cut / seat cut	30.3° / 59.7°

Where you see a 7/12 roof

Typical uses: colonials, farmhouses and homes with usable attic storage. A 7/12 roof is right around 30 degrees (30.26 to be exact). That is where many crews start setting toe boards or roof jacks, and some contractors begin to add a steep-slope charge. It gives noticeably more attic headroom than a 6/12.

Roof area at 7/12

7/12 formulas

Angle = arctan(7 ÷ 12) = 30.26° Multiplier = √(7² + 12²) ÷ 12 = 1.1577 Roof area = footprint × 1.1577 Rafter = run × 1.1577 Ridge height = run × 7 ÷ 12

Worked examples

Roof area. A 48 × 30 ft house with 1 ft overhangs has a 50 × 32 = 1,600 sq ft footprint. At 7/12: 1,600 × 1.1577 = 1,852 sq ft, or 18.5 squares before waste.

Rafter. A 28 ft span with a 1-1/2" ridge board has a 13.938 ft run. Line length = 13.938 × 1.1577 = 16' 1-5/8"; add an 18" overhang (1' 8-13/16" along the slope) for 17' 10-7/16". The ridge sits 8' 2" above the plate line. Try other spans in the rafter calculator.

7/12 rafter lengths and ridge heights

Common rafters at 7/12, measured to the center of the ridge
Building span	Run	Rafter (no overhang)	Ridge rise
16 ft	8 ft	9' 3-1/8"	4' 8"
20 ft	10 ft	11' 6-15/16"	5' 10"
24 ft	12 ft	13' 10-11/16"	7' 0"
28 ft	14 ft	16' 2-1/2"	8' 2"
32 ft	16 ft	18' 6-1/4"	9' 4"
36 ft	18 ft	20' 10-1/16"	10' 6"

Roof area by footprint at 7/12

Footprint to roof area at 7/12
Footprint (incl. overhang)	Roof area	Squares
1,000 sq ft	1,158 sq ft	11.6
1,500 sq ft	1,737 sq ft	17.4
2,000 sq ft	2,315 sq ft	23.2
2,500 sq ft	2,894 sq ft	28.9
3,000 sq ft	3,473 sq ft	34.7

Materials and walkability

Shingles: Yes. 4/12 and steeper takes a standard shingle installation.
Walkable? With care. Many roofers use toe boards or roof jacks at this pitch.

← 6/12 pitch · 8/12 pitch → · All pitches in degrees

Frequently asked questions

How many degrees is a 7/12 roof pitch?

A 7/12 roof pitch is 30.26 degrees.

What is the multiplier for a 7/12 pitch?

The pitch multiplier for 7/12 is 1.1577. Multiply the footprint area or horizontal run by it to get the sloped area or rafter length.

Can you put shingles on a 7/12 roof?

Yes. 4/12 and steeper takes a standard shingle installation.

Is a 7/12 roof walkable?

With care. Many roofers use toe boards or roof jacks at this pitch.

Last reviewed 2026-10-10. Results are estimates for planning; confirm quantities with your supplier and requirements with your local building code and the manufacturer's instructions.