Trace the source
Import a PDF or image, calibrate from a reliable known distance, and keep each count, length, area, perimeter, and volume connected to the source that supports it.
Turn the dimensions a listing, plan, or walkthrough actually supports into a reviewable scope. Separate measured quantities from allowances and unknowns so a clean cap-rate, cash-on-cash, or flip-profit formula does not inherit a casual rehab guess.
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Construction scope before financial output
A deal calculator can apply the formula perfectly. It cannot tell you whether the flooring area, wall surface, roof geometry, opening count, or wet-room scope behind the rehab input was measured, assumed, or omitted.
Import a PDF or image, calibrate from a reliable known distance, and keep each count, length, area, perimeter, and volume connected to the source that supports it.
Organize measured work, allowances, exclusions, and inspection questions separately. Unknown scope stays visible instead of quietly becoming zero.
Carry quantities into labor, material, equipment, and subcontract cost items, then save the estimate you discuss with a partner, lender, contractor, or buyer.
Takeoff does not provide comps, ARV, rent, financing, insurance, title, inspection, permit, legal, or tax conclusions. It makes the measurable construction input easier to inspect and communicate.
Real Zillow listing · Source snapshot July 26, 2026
At the July 26 snapshot, a Port Charlotte fixer was listed at $280,000 with 2,639 SF of living area. We transcribed its twelve published room dimensions into an original room-schedule reconstruction and measured the source before testing any rehab or return scenario.
The 751 SF is not “missing from the house.” It is living area that the published room schedule does not describe. It may include circulation, closets, open areas, or other spaces, and it remains unpriced from this source alone. Review the source listing.
Why the scope changes the deal
In one educational flip screen using the $280,000 asking price, 8% selling costs, and a $20,000 holding and closing allowance, a $450,000 ARV scenario moves from $64,000 profit to $14,000 and then negative $36,000 as the rehab input changes from $50,000 to $100,000 and $150,000.
Those are scenario inputs, not a bid, appraisal, comp analysis, or investment recommendation. The point is the sensitivity: return math cannot repair a weak construction assumption downstream.