What does the roofing squares calculator include?

Estimate roof area, roofing squares, bundles, and waste from plan dimensions and pitch. The default estimate adds 10% waste, which you can edit.

Should I round the result up?

Yes. Order whole bags or cartons, and order bulk material in the supplier's available increment after adding 5% to 10% for site loss.

Can I enter metric measurements?

Yes. The unit switch accepts metric measurements without creating a separate URL.

Is this result a code approval?

No. Product coverage and site conditions vary, so verify the quantity against the current product data and supplier rules.

Roofing Squares Calculator

Calculated result / live

4 shingle bundles

Order 4 bundles for 1.23 roofing squares, then verify the selected shingle's bundle coverage.

10.00 ft × 10.00 ft plan, 6.0 in / 12 in pitch, 10% waste, and 3 bundles per square.

Input panel

Project measurements

Roof plan lengthftRoof plan widthftRise per 12in / 12 inWaste%

Secondary quantities
Plan area	100.0 ft²
Sloped roof area	111.8 ft²
Ordered area	123.0 ft²
Roofing squares	1.23

Calculation trace

Formula with your numbers

10.00 × 10.00 × 1.118 × (1 + 10 ÷ 100) ÷ 100 = 1.23 squares; × 3 = 4 bundles

Take to supplier

Materials list

4 shingle bundles
1.23 roofing squares
10% waste allowance
Verify valleys, ridges, starter, and flashing separately

4 shingle bundles

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What this roofing squares calculator calculates

A 20 × 30 ft plan roof at a 6/12 pitch has 670.8 ft² of sloped area before waste, or 6.71 roofing squares.

Formula

Plan area × pitch factor = sloped area; sloped area × (1 + waste) ÷ 100 = squares; squares × bundle rate = bundles.

Worked example

With 10% waste, 670.8 ft² becomes 737.9 ft², or 7.38 squares. At 3 bundles per square, order 23 bundles.

Ordering decision

Valleys, hips, ridges, starters, flashing, underlayment, and the shingle's stated bundle coverage need separate checks.

The page cites the applicable Uzi Tools reference table beside the calculator. Product labels, current editions, local code, and a licensed professional govern structural, electrical, and life-safety work.

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How to use it

Enter the measured dimensions and keep the displayed units beside each field.
Review the roofing squares and shingle bundles result and the substituted formula before ordering.
Adjust waste for the layout, cut pattern, product package, and site conditions.
Copy or print the material list, then verify the cited product data and local requirements.

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Roofing squares and shingle bundles

This roofing calculator converts plan dimensions and pitch into sloped roof area, roofing squares, and bundle count. It includes waste before package rounding.

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Limits and professional review

Measurements, product yield, waste, moisture, and site conditions can change the order quantity. Local code and a licensed professional govern structural and electrical work.

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