How do I calculate floor area from a construction plan?

Upload your construction plan (PDF, JPG or PNG) to SiteScope. Our AI detects walls, reads the printed dimensions or scale, and returns the total floor area in square metres along with wall area, ceiling area and openings — usually in under 60 seconds.

How accurate is AI floor plan measurement?

AI measurement is directional and relies on printed dimensions or scale on the plan. It's great for quick quoting and budgeting but is not CAD-grade. SiteScope offers a 5% accuracy refund policy — if our estimate is off by more than 5%, we refund the credit.

Can I use this to estimate paint, tile or drywall coverage?

Yes. SiteScope returns wall area, floor area, ceiling area and perimeters separately, so you can use the right surface for each trade — wall area for painters, floor area for tilers, ceiling area for plasterers.

Is there a free version?

Yes — your first plan is on us. Enter your email on the homepage and we'll add one free credit to your account so you can measure your first plan before paying anything.

Does SiteScope work outside Australia?

Yes. SiteScope works globally with any English-language construction plan. Prices are shown in Australian dollars by default; equivalents in USD, GBP, EUR and other currencies are calculated at checkout.

Ceiling area · m² and ft²

Ceiling Area Calculator from Floor Plans

Need ceiling area in m² for a paint job, plaster patch, suspended-ceiling grid, or insulation install? Upload your floor plan and SiteScope returns the ceiling area for the whole plan or room-by-room — typically identical to floor area unless your plan includes vaulted or stepped ceilings, in which case override the height assumption.

Measured in m² / ft² Branded PDF in 60s ±5% refund policy

Accuracy note: SiteScope provides directional AI estimates based on printed dimensions/scale. Use for fast quoting and budgeting; verify on-site for binding quotes. ±5% accuracy refund policy applies.

How it works

From plan to ceiling area — in 60 seconds.

01
Upload your plan
02
AI returns ceiling area = floor area (or override for vaulted)
03
Room-by-room breakdown included when rooms are labelled
04
Use the m² figure × your rate to quote in seconds

Built for

Who uses the ceiling area calculator?

Ceiling painters
Plasterers patching ceilings
Suspended-ceiling installers (commercial fit-outs)
Insulation contractors
Acoustic-tile installers
Cornice & moulding installers

Frequently asked

About ceiling area.

Is ceiling area the same as floor area?+

For flat ceilings, yes — ceiling area equals floor area. For vaulted, raked, or coffered ceilings the actual surface area is larger; ask us to apply a multiplier (typically 1.05–1.25× depending on pitch).

Can I get ceiling perimeter for cornices?+

Yes — SiteScope returns the total external perimeter in lineal metres, which is the lineal length you'd order for cornices, ceiling roses or shadow lines.

More calculators

One plan, every measurement you need.

Floor area · square metres & square feet

Floor Area Calculator

Open calculator

Wall area · net of openings

Wall Area Calculator

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Paint coverage · litres & cost estimator

Paint Coverage Calculator

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Tile area · m² + wastage included

Tile Area Calculator

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Drywall takeoff · m² and sheet count

Drywall & Gyprock Takeoff Calculator

Open calculator

Stop measuring by hand.

Upload your plan now — the first ceiling area takeoff is on us.