Access the master All-India Bhulekh & Bhu Naksha Portal to inspect verified Record of Rights (Khatauni, Jamabandi, Satbara, Khatian) and download village Bhu Naksha plot maps across all 36 States and Union Territories.
Plot Area Calculator: 4-Side Irregular Land & Jamin Mojani Tool
Most agricultural fields and residential plots have uneven boundaries. Patwaris and village Amins calculate the ground area using the average boundary method: Average Length multiplied by Average Width. Enter the North, South, East, and West boundary lengths in Feet, Meters, Kadis, Gathas, or Karams to calculate total plot area in Square Feet, Bighas, Gunthas, and Acres.
How to Use the 4-Side Plot Area Calculator
Measure the North, South, East, and West perimeter boundaries along ridges or wall lines.
Choose Feet, Meters, Surveyor Kadis (0.66 ft), Gatha (8.25 ft), or Karam (5.5 ft).
Select UP Pucca, Bihar, MP, Rajasthan, or Bengal Bigha to align with your Khatauni.
Review computed area in Square Feet, Square Meters, Gaj, Acres, Bighas, and Gunthas.
Calculate 4-Side Boundary Land Area (Jamin Mojani)
Enter the measured boundary lengths on all 4 sides and select your measurement unit:
The Surveyor Average Boundary Formula: How Amins and Patwaris Calculate Land Area
In traditional revenue surveying across Uttar Pradesh, Bihar, Madhya Pradesh, Rajasthan, and Maharashtra, Amins and Talathis measure irregular quadrilateral plots using the Average Length and Width Method:
Average Width = (East Boundary + West Boundary) / 2
Total Land Area = Average Length × Average Width
This method provides an accurate approximation when opposite boundary sides are relatively parallel (within a 10% to 15% variation). For severely skewed trapezoidal plots or plots with extreme acute/obtuse angles, professional cadastral surveyors divide the quadrilateral into two triangles by measuring a fifth diagonal line (corner to corner), subsequently applying Heron's Formula:
Triangle Area = √[s × (s - a) × (s - b) × (s - c)]
Total Area = Triangle 1 Area + Triangle 2 Area
Traditional Survey Instruments & Conversion Factors
Historical Indian revenue maps and Field Measurement Books (FMB) record dimensions using traditional chains and surveying rods. Use this reference matrix to convert historical village measurements into modern feet and meters:
| Survey Instrument | Feet Equivalent | Metric (Meters) | Inches | Regional Application |
|---|---|---|---|---|
| 1 Gunter Chain (Jarib / जरीब) | 66.00 ft |
20.1168 m | 792 in | Standard All-India Cadastral Chain (100 Kadis) |
| 1 Kadi / Link (कड़ी) | 0.66 ft |
0.2012 m | 7.92 in | 1/100th of a Jarib; used on village Naksha sheets |
| 1 Revenue Gatha (गट्ठा / लट्ठा) | 8.25 ft |
2.5146 m | 99 in | Uttar Pradesh, Bihar, Rajasthan (5.5 Hath) |
| 1 Karam (करम) | 5.50 ft |
1.6764 m | 66 in | Punjab, Haryana, Himachal (3 Karams = 1 Kani) |
| 1 Gaj / Square Yard (गज) | 3.00 linear ft |
0.9144 m | 36 in | Residential plot frontages and municipal layouts |
| 1 Survey Hath / Cubit (हाथ) | 1.50 ft |
0.4572 m | 18 in | Eastern India (Bengal, Bihar, Odisha) rural plots |
Official Jamin Mojani Procedure: Demarcating Boundaries via State Land Records
When land disputes occur between adjacent agricultural plot owners, private measurements carry no evidentiary weight in a court of law. To obtain a legally binding boundary demarcation, landowners must apply for an official Jamin Mojani (Land Demarcation) through their respective state revenue portals:
- Maharashtra: Apply online on the Mahabhumi Mojani portal (mahabhumi.gov.in) with your 7/12 extract and 8A Khatedar certificate. Choose between Regular Mojani (60 days), Urgent Mojani (30 days), or Ultra-Urgent Mojani (15 days).
- Uttar Pradesh: File an application for Paimaish (पैमाइश) under Section 24 of the Uttar Pradesh Revenue Code, 2006 before the Sub-Divisional Magistrate (SDM) along with an updated Khatauni and court fee challan.
- Bihar: Submit a demarcation request through the Bihar Bhumi portal (biharbhumi.bihar.gov.in) to the Circle Officer (CO) with your computerized Jamabandi Register-II extract.
- Madhya Pradesh: File for Seemankan (सीमांकन) through the MP Bhulekh RCMS portal (rcms.mp.gov.in) under Section 129 of the MP Land Revenue Code, 1959.
Related Land Measurement Tools & Calculators
Select any complementary calculator below to convert units, measure boundaries, or verify ownership records:
Universal Land Unit Converter
Convert between any two Indian land measurement units across states, including Bigha, Biswa, Katha, Dhur, Kanal, Guntha, Cent, Gaj, and Acres.
Land Valuation & Rate Converter
Calculate total land price and compare rates per Sq Ft, per Gaj, per Acre, and per Bigha to evaluate deals and stamp duty benchmarks.
Bigha to Sq Ft Calculator
Calculate state-specific Pucca and Kachha Bigha conversions across Uttar Pradesh, Bihar, MP, Rajasthan, and West Bengal.
Acre to Bigha Calculator
Convert standard 43,560 sq ft acres into regional Bighas for North, East, and Central Indian land records.
Hectare to Bigha Calculator
Convert 4-decimal metric hectares from official Khatauni records into legal Bighas and local sub-units.
Cent to Sq Ft Calculator
Convert 435.6 sq ft Cents and 1,089 sq ft Gunthas for Tamil Nadu, Kerala, Andhra, Telangana, and Karnataka deeds.
Gaj to Sq Ft Calculator
Convert Square Yards (Gaj) to Square Feet for municipal residential layouts and building approval plans.
Dismil to Sq Ft Calculator
Convert Dismil and Decimal units across Bihar, Jharkhand, Odisha, and West Bengal land records.
Stamp Duty & Registry Calculator
Estimate property registration charges and statutory female buyer concessions across key Indian states.
Family Khata Share Splitter
Divide joint ancestral land holdings among legal heirs and calculate individual acreage and square footage.
Bhu Naksha Map Scale Distance
Convert millimeter ruler measurements on 1:4000 village cadastral maps into exact ground distances.
Cross-Verify Ground Boundaries with State Portals
Compare measured ground boundaries with digitized parcel maps and Khatauni land registers on your state revenue portal:
Frequently Asked Questions on Plot Area Calculation & Jamin Mojani
1. How do you calculate the area of an irregular 4-sided plot without a 90-degree corner?
Revenue Patwaris and Amins traditionally use the Average Boundary Method: Average Length = (North + South) / 2 and Average Width = (East + West) / 2. Multiplying Average Length by Average Width gives the standard revenue area. If the plot is heavily skewed or trapezoidal, measuring a diagonal corner-to-corner allows Heron's formula to calculate two precise triangles.
2. What is Jamin Mojani in Maharashtra and Gujarat?
Jamin Mojani (जमीन मोजणी) is the official land survey and boundary demarcation conducted by the Land Records Department (Bhumi Abhilekh). Citizens apply for Mojani to resolve boundary disputes, verify 7/12 Satbara or 8A Khatedar plot dimensions, or divide ancestral shares among co-owners.
3. What is a Kadi (Chain Link) in land survey?
A Kadi (कड़ी) is one link of a standard Gunter survey chain (Jarib). A full survey chain measures 66 feet (22 yards) and contains exactly 100 links. Therefore, 1 Kadi equals exactly 0.66 feet (7.92 inches or 20.12 cm). In village land records, plot boundaries are often recorded in Kadis.
4. What is a Gatha or Latha in UP and Bihar revenue measurement?
A Gatha (गट्ठा / लट्ठा) is a traditional wooden surveying rod measuring 5.5 survey cubits (हाथ), which equals exactly 8.25 feet (99 inches or 2.514 meters). 20 Gatha in length by 20 Gatha in width makes exactly 1 Pucca Bigha (400 square gatha = 27,225 sq ft).
5. How many Gunthas make one Acre?
In Maharashtra, Gujarat, and Karnataka, 1 Guntha equals 1,089 square feet (33 ft x 33 ft or 121 sq yards). Exactly 40 Gunthas equal 1 Acre (43,560 square feet).