Is this roofing calculator really free?

Yes — the DIY roofing calculator is 100% free with no signup, email gate, or credit card. Build your full quote, print it, and walk into contractor bids prepared.

How many shingles do I need for my roof?

Three bundles per roofing square (100 sq ft). A 2,000 sq ft roof at 6/12 pitch needs about 65–70 bundles after waste. Use the shingle calculator for an exact bundle count plus ridge cap and starter strip.

How do I calculate roof pitch?

Place a 12-inch level horizontally against a rafter and measure up to the rafter at the 12-inch mark. The vertical measurement is your rise — e.g. 6 inches = 6/12 pitch. Use the roof pitch calculator to convert to degrees and slope factor.

How much does roof replacement cost in Texas?

Most Houston-area asphalt shingle replacements run $7,500–$18,000 contractor-quoted, or $5,500–$12,000 true cost (materials + labor before overhead). Class 4 impact-resistant shingles qualify for a Texas insurance discount.

What's a roofing square?

100 square feet of roof surface area. It's the unit roofers use to spec materials and labor — 3 bundles of shingles per square, ~$85–125 sub-crew labor per square depending on pitch.

Can roofing contractors use this calculator?

Yes — many small and mid-size Houston-area roofing contractors use it to spec jobs, verify supplier pricing, and build customer-facing line-item quotes.

Is this roofing calculator really free?

Yes — the DIY roofing calculator is 100% free with no signup, email gate, or credit card. Build your full quote, print it, and walk into contractor bids prepared.

How many shingles do I need for my roof?

Three bundles per roofing square (100 sq ft). A 2,000 sq ft roof at 6/12 pitch needs about 65–70 bundles after waste. Use the shingle calculator for an exact bundle count plus ridge cap and starter strip.

How do I calculate roof pitch?

Place a 12-inch level horizontally against a rafter and measure up to the rafter at the 12-inch mark. The vertical measurement is your rise — e.g. 6 inches = 6/12 pitch. Use the roof pitch calculator to convert to degrees and slope factor.

How much does roof replacement cost in Texas?

Most Houston-area asphalt shingle replacements run $7,500–$18,000 contractor-quoted, or $5,500–$12,000 true cost (materials + labor before overhead). Class 4 impact-resistant shingles qualify for a Texas insurance discount.

What's a roofing square?

100 square feet of roof surface area. It's the unit roofers use to spec materials and labor — 3 bundles of shingles per square, ~$85–125 sub-crew labor per square depending on pitch.

Can roofing contractors use this calculator?

Yes — many small and mid-size Houston-area roofing contractors use it to spec jobs, verify supplier pricing, and build customer-facing line-item quotes.

Free DIY Roofing Calculator

15K Roof. Not 50K. That's just smart.

Skip the 2-hour pressure pitch and the 200–300% markup. Build your own honest roof quote — real materials, real labor, zero commission games. Know your roof's true cost — before a company quotes you.

Start my roof estimate How the calculator works

Sales markup

2 min

To a real number

100%

Free, no signup

Big-name roofers charge $50K for a $15K roof. Build your own honest DIY roof quote instead.

Get your roof measurement

Two ways to start — upload a report you already have, or have us pull one for free.

22 sq × (1 + 10% waste) = 24.2 squares ordered.

Need a repair only?

Same-day repair quote.

Leak, missing shingles, storm damage? Skip the calculator — leave your info or call now.

Call (713) 489-4265

Houston area · 7 days a week

Four steps. Real numbers.

No phone tag. No high-pressure sales. Just the actual cost.

STEP 1

Measure

Order a professional aerial report — or enter measurements yourself if you already have them.

STEP 2

Materials

Pick your shingle tier and underlayment. We auto-spec flashing, fasteners, and deck replacement.

STEP 3

Labor

Real Houston crew rates for tear-off and install. Adjusted for pitch, stories, and permits.

STEP 4

True Cost

See the actual price before overhead, insurance, profit, and sales commission get added.

Total price transparency

Every line item is editable and traceable. No black-box estimates. No 'we'll get back to you with a number.'

Spot inflated quotes

When you know what materials and labor actually cost, you can tell a fair markup from an outrageous one.

Walk into bids prepared

Print your quote, hand it to a contractor, and watch the negotiation change. Knowledge is leverage.

All-in-one roofing calculator suite

Specialized calculators for every part of a roof estimate — pitch, shingles, materials, replacement cost, squares, and waste.

Roofing Calculator

Full estimate — materials, labor, and true cost.

Roof Pitch Calculator

Convert rise/run to degrees and slope factor.

Shingle Calculator

How many shingle bundles you need.

Roof Replacement Cost

True cost vs. typical contractor quote.

Roof Square Calculator

Convert sq ft to roofing squares.

Roofing Waste Calculator

How much extra to order by roof shape.

DIY Roofing Calculator FAQ

Common questions about measuring, estimating, and pricing a roof.

Build your roof estimate now.

Two minutes. Zero signup. A roofing calculator number you can actually trust.

Start my roof estimate

Need a repair instead of a re-roof? See our Houston repair guide.