Rex says
Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.
Try a scenario
Click to load — tweak from there.Inputs
Result
Siding squares needed
22.00
Approximate panels
264
Estimated siding cost
$2,420
Psst — share this and help Rex grow
One click, a permanent link with your numbers baked in.
How to use this
- 1Enter wall area (sq ft).
- 2Enter waste factor (%).
- 3Enter panels per square.
- 4Enter price per square ($).
- 5Read your siding squares needed on the right — it updates as you type.
- 6Hit Share to keep the scenario or send it to someone.
About this calculator
Siding is often sold and quoted in 'squares' (100 sq ft units) or individual panels, so this calculator converts your home's total wall area into both units. It defaults to 2,000 sq ft of siding area with a 10% waste allowance for cuts and corners, then returns the number of squares, an approximate panel count, and total material cost.
Worked example
Using the values the calculator loads with:
Inputs
- Wall area: 2000 sq ft
- Waste factor: 10 %
- Panels per square: 12
- Price per square: 110 $
Results
- Siding squares needed: 22
- Approximate panels: 264
- Estimated siding cost: $2,420
What each field means
Inputs
- Wall area (sq ft)
- The wall area used in the calculation, measured in sq ft. Starts at 2000 sq ft so you have a working example on load.
- Waste factor (%)
- The waste factor used in the calculation, measured in %. Starts at 10 % so you have a working example on load. Accepted range: 0–30 %.
- Panels per square
- The panels per square used in the calculation. Starts at 12 so you have a working example on load.
- Price per square ($)
- The price per square used in the calculation, measured in $. Starts at 110 $ so you have a working example on load.
Results
- Siding squares needed
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Approximate panels
- Returned as a whole number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Estimated siding cost
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
What is a 'square' of siding?
A square is a contractor's unit equal to 100 sq ft of wall coverage, used because it simplifies estimating and pricing regardless of panel size.
How much waste should I add for siding?
10% is typical for a simple rectangular home; add 15-20% for homes with lots of gables, dormers, or trim details that create more cuts.
Does this include house wrap or trim?
No, this calculates the siding panels only — house wrap, starter strips, J-channel, and corner posts should be estimated separately based on linear footage.
Accuracy and limitations
- Estimates assume standard, average conditions — local rules, pricing, and materials vary.
- Results are rounded for readability; add a buffer before ordering, booking, or committing.
- Double-check anything with a real cost attached against a local quote.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). 2000 Sq Ft Siding Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/2000-sq-ft-siding-calculator
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/2000-sq-ft-siding-calculator" target="_blank" rel="noopener">2000 Sq Ft Siding Calculator — RevenueLab</a> (2026).</p>
Source: [2000 Sq Ft Siding Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/2000-sq-ft-siding-calculator) (2026).