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Know a home before you sign.

Send its floor plan and get its True Inch Report: every printed size checked against the drawing, its sun, daylight and breeze worked out, a score out of 100, and what to ask before you buy or rent. By email, usually within 20 minutes.

Drop the floor plan hereThe floor planPDF, PNG, JPG or WebP, up to 40 MB. A phone photo of a printed plan works.
What the home is to you (optional)

No password and nothing to install. Your report is emailed to you in about 10–20 minutes, and your plan stays private to you.

A sample report, on a home of ours in Austin, Texas. Read it in full, or see one from Bengaluru.
A sample report, on a home of ours in Bengaluru. Read it in full, or see one from Austin, Texas.
True Inch ReportTIS-US 1.0, for trial use

The Magnolia

Austin, Texas · 4 bedrooms · 2 bathrooms · 2,822 sq ft (262.2 m²)

62–64GoodThe True Inch Score, facing each way
With the top of the drawing to the
  • north64
  • east63
  • south64
  • west62

The Magnolia offers generous bedrooms and room for guests, but its kitchen layout and narrow bathroom access deserve attention before buying. The facing remains unconfirmed, so the daylight, sun and air findings are conditional.

The four key factors

Light

  • Daylight61
  • Sun80

The Great Room is dim by day.

Air

  • Air73

With a range hood running in the north wind, cooking smell reaches the den at 64% of its strength in the kitchen.

Space

  • Space76

Bedrooms 2, 3 and 4 have no closet drawn.

Layout & safety

  • Layout56
  • Safety & access38

The kitchen's fridge, sink and stove are far apart.

Scored under the True Inch Standard TIS-US 1.0 · Report TI-096728B47C58The full report
True Inch ReportTIS-IN 1.0, for trial use

Type B, 3 BHK

Bengaluru · 3 bedrooms · 2 bathrooms · 1,438 sq ft (133.6 m²)

65–68GoodThe True Inch Score, facing each way
With the top of the drawing to the
  • north68
  • east65
  • south67
  • west66

The bedrooms take their beds and wardrobes, but the dining room lacks an outside wall for a window and the attached toilet's basin obstructs a wider door swing.

The four key factors

Light

  • Daylight67
  • Sun68

The dining room has no window of its own.

Air

  • Air69

There's little breeze where you sleep and sit in every bedroom and the living room.

Space

  • Space81

There's no balcony to sit out on.

Layout & safety

  • Layout74
  • Safety & access25

The bathroom doors are narrow.

Scored under the True Inch Standard TIS-IN 1.0 · Report TI-48FE45B27CACThe full report

What a True Inch Report tells you.

Each one is made from the home's own floor plan, measured and worked out by the engine, then written up by an auditor. Everything shown here is the sample's, as its report has it.

A score out of 100, and where the points went.

The True Inch Standard scores six parts of a home, each from 0 to 100, against levels set by building codes, published standards and professional bodies: 50 is what a code asks, 75 is good practice. Each part says what cost it points.

How a True Inch Score is made

  • Space76Bedrooms 2, 3 and 4 have no closet drawn.
  • Daylight61The Great Room is dim by day.
  • Sun80The Primary Bedroom takes the summer sun's heat.
  • Air73There's little breeze where you sleep and sit in every bedroom, the Great Room and the den.
  • Layout56The kitchen's fridge, sink and stove are far apart.
  • Safety & access38The room and bathroom doors are narrow (28″–30″ clear).

50 what a code asks, or the accepted minimum75 good practice

  • Space81There's no balcony to sit out on.
  • Daylight67The dining room has no window of its own.
  • Sun68The living room takes the summer sun's heat.
  • Air69There's little breeze where you sleep and sit in every bedroom and the living room.
  • Layout74The kitchen's fridge, sink and stove are far apart.
  • Safety & access25The bathroom doors are narrow.

50 what a code asks, or the accepted minimum75 good practice

Every printed size, checked against the drawing.

Sale plans carry their own numbers, and about one in ten disagrees with the drawing it is printed on. Trueinch measures every room on the drawing and checks each printed size against it, so a room sold bigger than it is drawn is caught before you sign.

Bedroom 312′ 7″14′ 6″13′ 6″

A size needs a question

The printed size makes it a foot deeper than it is drawn. A room sold by its printed size and built to the drawing comes out smaller.

24 of 25 printed sizes hold to the drawing. Finished area (ANSI Z765, estimated from the drawing), measured on the drawing: 2,822 sq ft (262.2 m²).

Bedroom 215′ 7″14′ 7″11′ 11″

A size needs a question

The printed size makes it a foot wider than it is drawn. A room sold by its printed size and built to the drawing comes out smaller.

19 of 20 printed sizes hold to the drawing. Carpet area (RERA §2(k)), measured on the drawing: 1,438 sq ft (133.6 m²).

Findings that show their working.

Each finding says what it costs the score and why it matters, with the numbers behind it. An auditor then looks closer, at the cause and the trade-offs, and every sentence it writes is checked by code against the evidence before you read it.

Air−1 point

Little breeze where you sleep and sit in every bedroom, the Great Room and the den.

0.01–0.29 m/s over the beds and the sofa in the usual north wind, with the windows open: too little to feel cooler, which takes about 0.3 m/s.

Looking closer

In the north wind, Bedroom 3's bed gets still air at 0.02 m/s while the Great Room's sofa gets a gentle breeze at 0.31 m/s. At Bedroom 3's bed, air moving at 0.02 m/s is too still to feel, whereas the Great Room's sofa receives a gentle breeze with cooling equivalent to 1.7 °C.

Check
Sit on the Great Room's sofa and then beside Bedroom 3's bed on a breezy day, with windows and inside doors open, to compare the air where people rest.
Change
A ceiling fan in each, for a breeze you feel on still evenings

Air−4 points

Little breeze where you sleep and sit in every bedroom and the living room.

0.02–0.16 m/s over the beds and the sofa in the usual west wind, with the windows open: too little to feel cooler, which takes about 0.2 m/s.

Looking closer

Bedroom 2 gets 11 air changes an hour of outdoor air in the usual west wind, yet the air over its bed moves at only 0.02 m/s, too still to feel. The same distinction applies to the Master Bedroom and Bedroom 3: air passes through each room, but over their beds it moves at only 0.03 m/s and 0.03 m/s, so open windows alone do not provide a cooling breeze where you sleep.

Check
Stand beside each bedroom's bed with the windows and inside doors open during a west wind and check whether the breeze reaches the sleeping position.
Ask
Which window types and mosquito meshes will be supplied, and on which floor is the flat?

Improvements, tried on the home and scored again.

Where the home could be better, the change is made on its model and everything is worked out again: what the change does, a typical cost, and the score after it.

Install a ducted range hood and bathroom exhaust fans.

Ask the builder now, before it's built · an electrician and a hood installer

  • Cooking smell in the bedrooms, at its peak27% 16%

A typical cost$900 to $3,700Fixr, Range Hood Installation Cost, 2025-01-31; Fixr, How Much Does It Cost to Install a Bathroom Fan?, 2025-02-07

The score after it6465

Shade the living room's west window with a chajja.

Ask the builder now, before it's built · a fabricator

  • The sun's heat through the glass on a hot day, Living4.9 kWh 1.9 kWh

A typical cost₹4,000 to ₹11,900Sellers' listings on IndiaMART (aluminium sunshades, shade awnings); a contractor's rate sheet, 2026-10-08

The score after it6870

What to ask, and what to check on your visit.

The questions the drawing leaves open, ready to send to the builder, seller or landlord, and what only a visit can tell you, with where to stand and when.

Ask the builder

  • Can you provide a revised kitchen layout that brings the sink, range and refrigerator within NKBA's recommended distances?
  • Can the bedroom and bathroom doors be widened to the ICC A117.1 visitable-door standard?
  • Which Bedroom 3 dimensions will be written into the construction documents and sale agreement?

Check on the visit

  • Stand at Bath 2's doorway on the visit and measure the clear opening with the door fully open.Bath 2 has the narrower shared-bathroom doorway.
  • Stand beside the Primary Bedroom's bed at about 9:20 AM on July 21 to check where the morning sun reaches.At that time the Primary Bedroom's sun reaches both the floor and the bed with the drawing's top taken as north.

Ask the builder

  • Can you provide a revised toilet layout with wider doors and no door swing into the fixtures?
  • Have a structural engineer confirm that the walls can take the proposed doorway changes.
  • What finished internal width will the builder provide for Bedroom 2, and will the sale drawing be corrected to match it?

Check on the visit

  • Stand in the dining room at noon and check the daylight at the table and the room's edges.A clear noon can be bright enough even though typical daylight at the middle and edges falls short.
  • Stand beside each bedroom's bed with the windows and inside doors open during a west wind and check whether the breeze reaches the sleeping position.Air passing through the bedrooms does not translate into a felt breeze over their beds.

Beside the home in 3D, by link, and on paper.

On a screen the report reads beside the home's 3D model, which follows along: the sun at its hour, the breeze through the rooms, the walk in from the door. Share it by a link that opens without signing in, or keep the PDF, whose first page is the home at a glance, like the one at the top of this page.

See the engine build the home

The Magnolia, the sample home, in 3D as its report opens on it, the sun's path over it
On a screen, beside the home in 3D
On paper, its first page
Type B, 3 BHK, the sample home, in 3D as its report opens on it, the sun's path over it
On a screen, beside the home in 3D
On paper, its first page

How it works.

Nothing to install and nothing to draw. The plan you already have is enough.

  1. Now

    Send the plan.

    The floor plan, your email and where the home is: a PDF, a picture, or a phone photo of a printed plan. No password; your account is made from your email.

  2. While you wait

    It is measured and worked out.

    Trueinch reads every wall, door, window and printed size, checks each number against the drawing, and builds the home in 3D at its true size, furnished at real sizes. Then it works out the sun through the year, the daylight, the breeze and where cooking smells go, and scores the home. You can close the page meanwhile.

  3. Usually within 20 minutes

    Your report, by email.

    The email opens your report, with nothing to sign in to: the report beside the home in 3D, a link to share it, and a PDF to keep. To walk through the home, measure it and ask it anything, sign in with a code we email you.

Your plan is kept as a home in your account, private to you: it is shared only if you make a link.

See it work on a real plan.

This is the engine at work on the sample report's home, a plan we drew the way builders' brochures are drawn, one misprint and all: reading the drawing, checking its numbers, building it in 3D, then its furniture, its sun, its air and its answers.

Every report is made by the same work. Read on, and drag the model to turn it.

A floor plan drawn as builders' brochures are, of a four-bedroom house, The MagnoliaA floor plan drawn as builders' brochures are, of a three-bedroom apartment, Type B, 3 BHK

It reads the drawing, line by line.

Every room name and printed size, each piece of furniture, every door and window and, last, the walls: each found exactly where it is drawn.

The reading beside this is a real one, of a plan we drew the way builders' brochures are drawn, shown at five times its speed.

Then it checks every printed number.

Each number is read again on its own, by the model and by OCR, then measured against the walls and the plan's other numbers. A misprint is named, not built into the home.

Then it builds the home, true to the inch.

Walls at their real thickness, doors swinging the way they are drawn, windows at their sills. Turn it, look into any room, measure any wall.

Furniture at real sizes, and the way through.

Brochures shrink furniture to make rooms look bigger. Trueinch matches each drawn piece to a real one, furnishes empty rooms where things fit, and walks to every room from the front door.

The sun, minute by minute, on any day.

Real sun positions for where the home is, through each window as it is drawn: where the light falls, how long each room has it, and when the lamps would come on.

And the air, as it moves through the rooms.

A breeze through the open windows, worked out in every few inches of the home: where it comes in, where it goes, and how often each room's air is replaced.

Ask it anything. Every answer shows its working.

Questions in plain words, answered from the home itself. Every number in an answer carries its source, one tap from the proof.

How sure it is, measured.

Real plans carry their own answers: the numbers printed on them. We test Trueinch against those, and against plans made with every answer known, and publish where it falls short.

The score is made under the True Inch Standard for Homes, edition 1.0, for trial use. Every level it holds a home to names its source: a building code, a published standard, or a professional body's guidance. How a True Inch Score is made

Trueinch gives a plan-verified estimate, not a certified measurement.

  1. 85%

    of printed numbers on 152 real plans worked out to within an inch.

    Each number hidden in turn and worked out from the drawing and the plan's other numbers alone. 97% came within three inches.

  2. 1 in 10

    printed numbers on real plans disagree with their own drawing.

    Trueinch names each one, with the length the drawing gives instead, and leaves it out of the home.

  3. 100%

    of the misprints we planted in 128 test plans were caught.

    On the same plans every room was found, and 94% of room sides came within half an inch of the truth.

  4. 43 of 43

    test questions answered with every sentence cited.

    No number in an answer comes from anywhere but the home it is about.

For whoever is deciding on a home.

  • Buying off-plan

    The brochure's plan is all there is. Check its sizes, its light and its air, and know what to ask the builder while the plan can still change.

  • Buying a resale home

    Know what you are paying for before you make an offer: the sizes, the sun and the breeze, and what to check while you are there.

  • Renting

    Compare homes from their plans: which is brighter, cooler and airier, and whether the bed and the sofa fit with room to walk round them.

  • Owning, and planning a change

    See where your home falls short and what would help, each improvement tried on the model and scored again, with a typical cost.

For agents, architects and designers: a measured 3D model of any drawing, its printed sizes checked, and a report to send by link.

Questions, answered.

What kind of floor plan works?

A drawing of the home's floor, as a PDF, PNG, JPG or WebP of up to 40 MB: a builder's brochure, a listing's plan, an architect's drawing, or a phone photo of a printed plan, taken straight on and in good light. Plans in feet and inches and plans in metres both work.

How long does it take?

About 10–20 minutes from sending the plan. You can close the page: we email the report to you when it's ready.

Do I need an account or a password?

No password, and nothing to set up. An account is made from the email you give, and the email opens your report with nothing to sign in to. A 6-digit code, sent by email, is only for opening the home in 3D to walk through it, measure it and ask it questions.

How accurate is it?

On 152 real plans, 85% of printed numbers were worked out to within an inch from the drawing alone, and every misprint planted in 128 test plans was caught (how it is measured). Each report says what it measured, what it assumed and how sure its score is. Trueinch gives a plan-verified estimate, not a certified measurement: measure at handover.

Is my plan private?

Yes. Your plan is kept as a home in your account, and only you can see it. It is shared only if you make a link, which shows the drawing you uploaded only if you choose and which you can turn off at any time. You can delete a home, or your account, whenever you like.

What does the score mean?

It rates how well a home's design works for daily living, from 0 to 100, under the True Inch Standard: six parts, each held to levels from building codes, published standards and professional bodies, and a band from Poor to Excellent. It isn't a valuation, an inspection of the building, or a check against the building code. How a True Inch Score is made.

Can I share the report?

Yes. Send it by a link to family, an agent or your architect: it opens without signing in, with the home in 3D beside it. Or keep its PDF, whose first page is the home at a glance.

What if the drawing has no north arrow?

Then the drawing can't say which way the home faces, and its sun and breeze depend on it. The report scores the home each way it could face, shows the range, and asks you first; your answer gives it its one score. Both sample reports are like this.

Does it work for homes in India and the US?

Yes. A home in India is scored under the standard's Part for India (TIS-IN), with carpet area as RERA defines it; a home in the US under its Part for the US (TIS-US), with finished area after ANSI Z765. Lengths are given in feet and inches or in metres, as you read them.

Get the report on the home you're deciding on.

Send its floor plan, and the report comes by email, usually within 20 minutes. No password, and nothing to install.

Drop the floor plan hereThe floor planPDF, PNG, JPG or WebP, up to 40 MB. A phone photo of a printed plan works.
What the home is to you (optional)

No password and nothing to install. Your report is emailed to you in about 10–20 minutes, and your plan stays private to you.