6/12 Pitch in Degrees: Angle, Slope & the Classic Residential Pitch (2026)

A 6/12 pitch is 26.57 degrees, or a 50% slope: the roof rises 6 inches for every 12 inches of horizontal run. It is the classic American residential pitch — the slope most people picture when they picture a house — and it is the most-searched pitch in degrees in the country, which is why so many homeowners in Waukegan and Lake County, Illinois, end up asking about it. If your bid, inspection report, or shingle quote says “6/12”, this guide gives you the exact angle, the slope math, and what this pitch means for materials, walkability, and snow. Convert any pitch with our roof pitch calculator.

How the Math Works

Pitch notation is rise over run: inches of rise per 12 inches of run. The angle is atan(rise / 12). For a 6/12 pitch, atan(6 / 12) = atan(0.5) = 26.57 degrees. The slope percentage is (6 / 12) x 100 = 50% — a handy one to remember, because the rise is exactly half the run. Over a 12-foot horizontal run, a 6/12 roof rises 6 feet. The area multiplier is 1.118, so a 1,000 square foot footprint carries about 1,118 square feet of roof surface before hips, valleys, and overhangs. That 12% area bump over the footprint is the number to use when sanity-checking a shingle or metal quote.

Pitch-to-Degrees Reference Table

Every common residential pitch, with the angle and slope for each. Your pitch is shown in bold.

Pitch	Angle	Slope	Category
2/12	9.46 degrees	16.7%	Low
3/12	14.04 degrees	25.0%	Low
4/12	18.43 degrees	33.3%	Low-moderate
5/12	22.62 degrees	41.7%	Moderate
6/12	26.57 degrees	50.0%	Moderate
8/12	33.69 degrees	66.7%	Steep
9/12	36.87 degrees	75.0%	Steep
10/12	39.81 degrees	83.3%	Very steep
12/12	45.00 degrees	100.0%	Very steep

What This Pitch Looks Like

A 6/12 roof is the Goldilocks profile: steep enough to look properly pitched and shed weather decisively, gentle enough to keep the house from looking like a church steeple. From the street it gives a balanced, traditional gable that suits colonials, Cape Cods, ranches, and modern farmhouses alike. Attic space is genuinely useful — storage plus mechanicals, and often enough headroom for a finished room with dormers. Because it is the default pitch for so much American housing, every material and every roofer is set up for it, which keeps quotes competitive.

Can You Walk on It?

A 6/12 pitch is walkable with care, and it is roughly where comfortable walking ends. Roofers work on 6/12 roofs every day, but most will use roof jacks, staging, or a harness on longer runs, and many homeowners find it steeper than expected once they are actually on it. A careful dry-weather walk for inspection is reasonable for a confident homeowner; repairs belong to a roofer. In wet, frosty, or mossy conditions, a 6/12 is firmly in harness territory. Lake County winters make this a seasonal rule: from first frost to spring thaw, stay off the roof and inspect from a ladder or the ground.

Materials That Suit This Pitch

Every mainstream material suits a 6/12 pitch, with no special rules and no exceptions. Architectural asphalt shingles are the default and install to standard specs. Standing seam metal excels, shedding water and snow fast. Clay and concrete tile perform beautifully at 6/12 — steep enough for excellent drainage, gentle enough for safe installation — subject to the usual structural check for weight. Cedar shakes, slate, and synthetic slate all work too. At 6/12, the choice is purely about looks, budget, and lifespan, which is one more reason this pitch dominates American housing.

Illinois Snow, Ice and Wind Notes

For Lake County winters, 6/12 is close to ideal. Snow sheds reliably without the avalanche sheets that very steep metal roofs can drop, and the slope is steep enough that deep, lingering snow loads are uncommon. Ice dams can still form at the eaves in a hard freeze-thaw cycle, so insulation, ventilation, and ice-and-water shield remain standard — but they are routine on a 6/12, not special measures. Wind uplift is higher than on a low slope but well within what a properly nailed shingle or seamed metal roof handles. If you are choosing a pitch for new construction in northern Illinois, 6/12 is the safe default.

How to Measure Your Own Pitch

Measure with a 12-inch level and tape: hold the level horizontal against the roof or a rafter, mark 12 inches out, then measure straight down at that mark. A 6-inch drop means a 6/12 pitch, or 26.57 degrees. From the attic, measure along a rafter the same way — often easier and safer than climbing. A phone inclinometer aimed along the slope gives a rough ground check. Confirm before ordering in our roof pitch calculator. Neighboring pitches: 5/12 pitch in degrees and 8/12 pitch in degrees. Every tool is in the roofing calculators hub.

Common Mistakes With This Pitch

The most frequent 6/12 mistake is confusing it with a 5/12 or 7/12 from a ground-level guess. From the street, a 5/12, 6/12, and 7/12 all look “about average,” but their surface areas differ by roughly 3% per step, and their walkability differs noticeably. A second mistake is underestimating how steep 6/12 feels once you are on it: homeowners who plan to DIY a repair often discover mid-job that they need staging they did not budget for. A third is ignoring the ridge: on a 6/12, the ridge cap and ridge vent do heavy weather work, and a cheap or poorly sealed ridge is the first place a storm finds. Get the ridge detail in writing on any 6/12 quote. Another 6/12 check is attic ventilation balance: intake at the soffits must roughly match exhaust at the ridge, or the attic will run hot in summer and damp in winter despite the ideal pitch. Blocked soffit vents from blown-in insulation are the usual culprit, and clearing them is a small job with an outsized effect on shingle life and ice-dam resistance. Check the ridge vent for a continuous, unblocked slot while you are at it.

Frequently Asked Questions

How many degrees is a 6/12 pitch?

A 6/12 pitch is 26.57 degrees. The roof rises 6 inches for every 12 inches of horizontal run, and atan(6 / 12) = 26.57 degrees. Its slope is 50%.

What angle is a 6/12 pitch?

The angle of a 6/12 pitch is 26.57 degrees — the same figure as its degree measurement. “Angle”, “degrees”, and “how many degrees” all ask the same question, and the answer is atan(6 / 12) = 26.57 degrees.

What degree is a 6/12 pitch?

A 6/12 pitch is 26.57 degrees. Variants like “what degree is a 612 pitch” and “what is the degree of a 6/12 pitch” all refer to this same measurement: a 6-inch rise per 12 inches of run.

Is a 6/12 pitch walkable?

Yes, with care. A 6/12 pitch is roughly where comfortable walking ends: roofers work on it daily, usually with roof jacks or a harness on longer runs. A careful dry-weather inspection walk is reasonable; repairs belong to a roofer, and wet or icy conditions make it harness territory.

What is the slope percentage of a 6/12 pitch?

The slope of a 6/12 pitch is 50%, because (6 / 12) x 100 = 50%. The rise is exactly half the run, and the roof-surface area multiplier is 1.118 — so a 1,000 square foot footprint carries about 1,118 square feet of roof surface.