From an image
Best when you have a naksa, kitta map, site plan or municipal drawing. Calibrate against a known length and trace the boundary — no field measurement needed. Irregular plots with any number of corners are fine.
What it does
A measuring tool, not just another unit box
Everything below runs in your browser — open the page and start working.
Measure straight from a naksa
Upload a photo or scan of a naksa, kitta map or site plan. HEIC photos from an iPhone open directly — no converting first.
Calibrate in two taps
Tap the ends of any line you can measure and enter its length in mm, cm, m, inches or feet — measured on the ground, or across the paper with a ruler.
Several plots at once
Trace multiple plots on the same drawing, each named and colour-coded, with a running total across all of them.
Every Nepali unit
Square feet, square metres, Ropani-Aana-Paisa-Dam and Bigha-Katha-Dhur, reported side by side with no dropdown to fiddle with.
What the land is worth
Enter the rate per Aana, Ropani, Dhur, Katha, square foot or square metre and the plot is priced instantly — in rupees, and in USD, AUD, CAD, GBP, JPY, AED, QAR, SAR, MYR or KRW at the day's exchange rate.
Save, export and share
Projects are saved in your browser with the drawing attached. Export a labelled PNG or a print-ready PDF for a client, engineer or the bank.
Runs on your device
Decoding, calibration and calculation all happen in your browser. GharNaksa may securely store a copy of uploaded drawings to improve the free tools.
How it works
From a photo of your naksa to an area, in five steps
The whole thing takes about two minutes the first time, and less after that.
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Upload or scan
Pick a file, drag it in, paste it, or press Scan to photograph the naksa. HEIC, JPG, PNG, WEBP and AVIF all work.
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Calibrate the scale
Tap the two ends of a line whose real length you know — a boundary dimension, a road width — and type that length. For a flat scan, pick the drawing scale instead.
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Save it as a template
Name the calibration and it is stored in your browser. The next drawing of the same type is ready to measure immediately.
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Trace the boundary
Tap each corner in order. Pinch to zoom, drag a corner to nudge it, tap an edge to insert one between two others. Every edge length is labelled as you go.
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Read the area
Press Calculate for the full breakdown across all four unit systems, then copy or export the summary.
On a phone your finger covers the spot you are aiming at, so holding and sliding opens a magnifier that shows the exact point and commits only when you lift.
Two ways to measure
With a drawing, or with a tape
By field lengths
Best when you measured the plot yourself with a tape. Sketch the shape, press Auto-connect & triangulate to build the base corner and diagonals, then type in each measured length. Area comes from Heron's formula, so the sketch needs no scale at all.
The sketch is then solved into the real shape: your lengths already determine the true polygon, so it is laid over your drawing with the corners moved as little as possible.
Ready when you are
Measure your naksa now
The calculator opens full screen so nothing scrolls away while you are tracing. Works on phone and desktop, and every measurement is worked out in your own browser.
Reference
Nepali land unit conversion chart
The hill chain, the Terai chain, and the cross-conversions people actually look up.
Hill units — Ropani, Anna, Paisa, Dam
| Unit | Equals | Square feet | Square metres |
|---|---|---|---|
| 1 Ropani | 16 Anna | 5,476 | 508.74 |
| 1 Anna | 4 Paisa | 342.25 | 31.80 |
| 1 Paisa | 4 Dam | 85.56 | 7.95 |
| 1 Dam | — | 21.39 | 1.99 |
Terai units — Bigha, Katha, Dhur
| Unit | Equals | Square feet | Square metres |
|---|---|---|---|
| 1 Bigha | 20 Katha | 72,900 | 6,772.63 |
| 1 Katha | 20 Dhur | 3,645 | 338.63 |
| 1 Dhur | — | 182.25 | 16.93 |
Quick cross-conversions
| From | To | Value |
|---|---|---|
| 1 Bigha | Ropani | 13.31 |
| 1 Ropani | Katha | 1.50 |
| 1 Ropani | Square metres | 508.74 |
| 1 Katha | Anna | 10.65 |
| 1 Hectare | Ropani | 19.66 |
| 1 Hectare | Bigha | 1.48 |
| 1 Square metre | Square feet | 10.7639 |
Accuracy
Getting a number you can rely on
- Calibrate on the longest known line you can find. A short reference multiplies any tapping error across the whole plot.
- Shoot the drawing flat and square on. A tilted photo stretches one side of the sheet, which no single scale factor can correct.
- Zoom in before tapping corners. At high zoom a stray pixel is worth centimetres instead of metres.
- Sanity-check with the scale bar. The ruler in the corner of the canvas shows what the calibration means on the ground — if 20 ft looks wrong against the drawing, recalibrate.
- Cross-check one edge. Compare a labelled edge length against a dimension printed on the naksa before trusting the total.
GharNaksa Naapi Plotter is a planning and estimation tool. For registration, transfer or any legal purpose, use a measurement from a licensed surveyor or the Survey Department record.
Free tools
Nepali land unit converters
Quick conversions between every unit used on Nepali land paperwork. Each page also carries the full Ropani/Bigha chain calculator.
Guides
Learn the paperwork, not just the numbers
Plain-language explainers on Nepali land units, kitta maps and measuring from a photo.
Everything Naapi Plotter can do
The full feature tour: calibration, dimensions, multiple plots, projects, exports and field lengths.
How to calculate land area in Nepal
Ropani, Aana and Bigha explained, with three practical ways to get the area of a plot.
How to read a Nepali naksa
Kitta numbers, boundaries, scale bars, and what to do when no scale is printed at all.
Measure land area from a photo
Step by step from a phone photo to an area — and the mistakes that quietly ruin the result.
On your phone
Same Naapi tools inside Construction Calculator
Prefer working on Android? Construction Calculator from GharNaksa brings cost estimation, material breakdowns, PDF reports — and Naapi land measurement — into one free app. Scan the QR code or open it on Google Play.
- Cost estimation for house builds
- Material breakdown you can share
- PDF reports for clients and sites
- Naapi plot measurement on the go
FAQ
Frequently asked questions
Can I calculate land area from a photo of my naksa?
Yes. Upload a photo or scan of the drawing, calibrate it against one line whose real length you know, then tap around the plot boundary. The area comes from the traced shape and the calibrated scale.
Does GharNaksa Naapi Plotter support HEIC photos from an iPhone?
Yes. HEIC and HEIF files are decoded in the browser and converted automatically, so you can upload straight from an iPhone without changing your camera settings or converting anything first.
How accurate is measuring land area from an image?
Accuracy depends on your calibration reference and how precisely you tap the corners. Calibrate against a long, clearly drawn line and zoom in before tapping. A flat scan beats an angled phone photo, because a tilted camera distorts the sheet. Treat the result as planning-grade, not a legal survey.
What if my naksa has no printed scale?
Use the Known length method rather than the drawing scale. Any line you can identify in real terms works — a dimensioned boundary, a road width, or a wall you measured on site.
How many square feet is 1 Ropani?
1 Ropani is 5,476 square feet, about 508.74 square metres. It divides into 16 Anna, 64 Paisa or 256 Dam.
How many square feet is 1 Bigha?
1 Bigha is 72,900 square feet, about 6,772.63 square metres. It divides into 20 Katha or 400 Dhur, and equals roughly 13.31 Ropani.
Is my naksa image uploaded to a server?
Decoding, calibration and area calculation all run inside your browser. GharNaksa may securely store a copy of uploaded drawings to improve the free tools; projects and calibration templates stay in your own browser storage.
Can I measure land without a drawing at all?
Yes. Switch to By lengths, sketch the plot shape, and enter the measured field lengths in feet and inches. The area is computed by splitting the shape into triangles from a base corner.