# Roof Area Calculator | Free Tool — Tri-Arch Sdn Bhd

> Estimate your roof area for repair, replacement, or re-roofing planning. Free roofing calculator for Kuala Lumpur & Klang Valley homeowners.

URL: https://roofrepairkl.my/tools/roof-area-calculator/

Free Tools

[/tools/ →](/tools/)

 / Roof Area Calculator

# Roof Area Calculator

Estimate your roof area for repair, replacement, or re-roofing planning.

Calculation MethodFrom Building FootprintFrom Roof Dimensions

Building Length(m)

Building Width(m)

Roof Length (ridge to eave)(m)

Roof Width (along ridge)(m)

Number of Roof Sides2 (Simple gable)4 (Hip roof)

Roof PitchFlat (0-1/12)Low (2/12)Low (3/12)Medium (4/12)Medium (5/12)Medium (6/12)Steep (7/12)Steep (8/12)

Waste Factor10% (Simple roof)15% (Standard — Recommended)20% (Complex roof, many valleys)25% (Very complex, many dormers)

This calculator provides estimates based on your measurements. Actual area may vary due to dormers, valleys, and other features. A professional inspection is recommended for accurate quotes.

#### Get a Professional Roof Estimate

We inspect your roof on-site and provide a transparent, itemised quote — no guessing over the phone.

Or WhatsApp Us Directly →

[https://wa.me/60379812870?text=Hi%2C%20I%20used%20your%20roof%20area%20calculator%20and%20my%20estimated%20roof%20area%20is%20around%20%7BtotalWithWaste%7D%20m%C2%B2.%20I'd%20like%20a%20professional%20quote%20for%20repair%2Fre-roofing. →](https://wa.me/60379812870?text=Hi%2C%20I%20used%20your%20roof%20area%20calculator%20and%20my%20estimated%20roof%20area%20is%20around%20%7BtotalWithWaste%7D%20m%C2%B2.%20I'd%20like%20a%20professional%20quote%20for%20repair%2Fre-roofing.)

Prefer to speak with a specialist?

Call 03-7981 2870

[tel:+60379812870 →](tel:+60379812870)

← All Tools

[/tools/ →](/tools/)