Latitudinal and longitudinal extent of India

Also called: Latitudinal extent of India, Longitudinal extent of India · Topic: India: Location, Size, Extent and Divisions · NCERT: Class 6, Ch 1 "Locating Places on the Earth"; Class 7, Ch 1 "Geographical Diversity of India"; Class 11, Ch 1 "India - Location"

Meaning

India's latitudinal and longitudinal extent is the spread of its mainland between its southernmost and northernmost parallels (8°4'N to 37°6'N) and between its westernmost and easternmost meridians (68°7'E to 97°25'E). Each spread is about 30°. The whole territory reaches further south, to 6°45'N at Indira Point [2].

This position explains several things about India:

• It decides India's climate zones, because the Tropic of Cancer cuts the country into two halves.
• It explains why the north-south length is greater than the east-west length.
• It explains why there is about a 2-hour difference in local time between the east and the west.

Explanation

Key terms and India's place on the globe

• Latitude: how far a place is north or south of the Equator (0°). Lines of latitude are called parallels. They run side by side and never meet.
• Longitude: how far a place is east or west of the Prime Meridian (0°, at Greenwich, London). Lines of longitude are called meridians. They run from pole to pole and meet at both poles.
• Mainland: the main, continuous landmass of a country. It does not include the islands.
• India lies wholly in the Northern Hemisphere and wholly in the Eastern Hemisphere.

Extent	From	To	Spread
Latitudinal	8°4'N (Kanniyakumari)	37°6'N (northern tip of Jammu and Kashmir/Ladakh, as claimed by India)	about 29° (≈30°)
Longitudinal	68°7'E (Gujarat)	97°25'E (Arunachal Pradesh)	about 29°18' (≈30°)

• From north to south, the mainland runs from Kashmir to Kanniyakumari. From east to west, it runs from Arunachal Pradesh to Gujarat.

Why the two "30°" spreads are not equal in kilometres

• The fact: the north-south distance is 3,214 km. The east-west distance is only 2,933 km.
• Parallels are evenly spaced.

• So 1° of latitude ≈ 111 km everywhere on Earth.

• Meridians come closer together towards the poles.

• So 1° of longitude gets shorter as latitude increases. It is about 111 km at the Equator and 0 km at the poles.
• Rule of thumb: 1° of longitude ≈ 111 km × cos(latitude).

Latitude	Place (approx.)	1° of longitude ≈
0°	Equator	111 km
~8°N	Kanniyakumari	110 km
~23.5°N	Tropic of Cancer	102 km
~37°N	Northern tip	89 km

• Result: most of India's east-west width lies between about 20°N and 28°N. At these latitudes, a degree of longitude is shorter than 111 km. So the east-west distance comes out smaller than the north-south distance.

Longitude and time

• The Earth turns through 360° in 24 hours.
• So 1° of longitude = 4 minutes of time.

• India spans about 29°18' of longitude, which gives about 2 hours of local time difference.

• In Parliament, it has been noted that the sun rises nearly two hours earlier in the east than at India's western tip [4].

• Indian Standard Time (IST) is fixed on the 82°30'E meridian, which passes through Mirzapur (Uttar Pradesh) [5]. IST is 5 hours 30 minutes ahead of GMT.
• The Legal Metrology (Indian Standard Time) Rules, 2026 make IST the single, legally binding time reference for the whole country ("One Nation, One Time") [6].

Latitude and climate: the Tropic of Cancer

• The Tropic of Cancer (23°30'N) is the northernmost parallel where the noon sun can be directly overhead. This happens around 21 June, the summer solstice (the day the sun reaches its farthest point north).
• It passes through roughly the middle of India and splits the country into two zones:
• South of it: the tropical zone (the belt between the two tropics, where the noon sun is overhead at least once a year). The sun is high all year, so it stays hot and the yearly temperature range is small.

• North of it: the sub-tropical or warm temperate zone. The winter sun comes in at a slant, so winters are cold, the yearly temperature range is large, and the Himalaya gets snow.

• Result: the two halves differ in climate, soils, natural vegetation and landforms.

• Soils: the hot, wet south has deeply weathered laterite soils.

• Vegetation: the south has tropical evergreen forests, while the north has temperate and alpine forests.

• Distance from the sea adds to these differences:

• Coastal and peninsular areas have a mild maritime climate.
• The interior of the north has a harsh continental climate (very hot summers and cold winters, because land heats up and cools down fast).

Where it occurs

Extreme points of India:

Direction	Point	Location
North	Indira Col	Siachen Glacier area, Ladakh (as claimed by India). It is a mountain pass (col) on the Karakoram ridge.
South (whole territory)	Indira Point	6°45'N, at the southern tip of Great Nicobar Island, Andaman and Nicobar Islands [2]
South (mainland)	Kanniyakumari (Cape Comorin)	Tamil Nadu, 8°4'N. The Arabian Sea, Bay of Bengal and Indian Ocean meet here.
East	Kibithu	Anjaw district, Arunachal Pradesh, near the trijunction with China and Myanmar
West	Guhar Moti	Kachchh district, Gujarat, near Sir Creek and the border with Pakistan

Indira Point:

• It sits beside the Great Channel, also called the Six Degree Channel, which is a busy international shipping lane [2].
• This channel separates Great Nicobar (India) from Sumatra (Indonesia). Indira Point is about 150 km from Indonesian territory.
• A magnitude 9.1 earthquake struck off Sumatra on 26 December 2004. The tsunami it caused hit the Andaman and Nicobar Islands hard [3].
• A tsunami is a series of very long sea waves. It starts when the sea floor moves suddenly, usually in an undersea earthquake.
• The coast of Great Nicobar sank and was flooded, and part of Indira Point was lost to the sea.

Tropic of Cancer: the 8 states it crosses, from west to east:

• Gujarat: Gandhinagar lies just north of it.
• Rajasthan: southern part, near Banswara.
• Madhya Pradesh: Bhopal lies just north of it.
• Chhattisgarh: northern part.
• Jharkhand: Ranchi lies just south of it.
• West Bengal: near Krishnanagar.
• Tripura: Agartala lies just north of it.
• Mizoram: Aizawl lies just north of it.
• Mnemonic: Good Rain Makes Crops Jump With True Magic.

IST meridian: 82°30'E, passing through Mirzapur, Uttar Pradesh [5].

Don't confuse with

• Mainland extent vs whole-territory extent: the mainland starts at 8°4'N (Kanniyakumari). The whole territory starts further south, at 6°45'N (Indira Point, Great Nicobar) [2].
• Indira Point vs Indira Col: Indira Point is the southern limit, on Great Nicobar Island. Indira Col is the northern limit, a mountain pass in the Siachen area of Ladakh.
• Degree of latitude vs degree of longitude: 1° of latitude is about 111 km everywhere. The length of 1° of longitude shrinks towards the poles and is about 102 km at 23.5°N.
• Local time vs Indian Standard Time: local time changes by 4 minutes for every degree of longitude, which gives about a 2-hour spread across India. IST is one single time for the whole country, based on 82°30'E [5].

Prelims Hooks

• 8°4'N–37°6'N and 68°7'E–97°25'E is the mainland extent. The whole territory reaches 6°45'N at Indira Point, Great Nicobar, on the Six Degree Channel [2].
• North-south 3,214 km is greater than east-west 2,933 km, even though both spreads are about 30°. The reason is that meridians come together towards the poles.
• Extreme points:
• North: Indira Col (Ladakh)
• East: Kibithu (Anjaw, Arunachal Pradesh)
• West: Guhar Moti (Kachchh, Gujarat)

• South of the mainland: Kanniyakumari (Tamil Nadu)

• The Tropic of Cancer crosses 8 states: Gujarat, Rajasthan, MP, Chhattisgarh, Jharkhand, West Bengal, Tripura, Mizoram.

• Trap: it does not cross Odisha, Bihar, Uttar Pradesh, Maharashtra, Assam, Meghalaya or Manipur.

• State capitals near the Tropic of Cancer: Gandhinagar, Bhopal, Ranchi (just south of it), Agartala, Aizawl.

• About 30° of longitude × 4 minutes ≈ 2 hours of local time difference. IST is based on 82°30'E (Mirzapur, UP) and is GMT + 5:30 [5].

Mains Points

• Latitude shapes India's diversity (GS-I):
• The Tropic of Cancer splits India into a tropical south and a sub-tropical/warm-temperate north.

• Together with the Himalaya and distance from the sea, this explains India's wide range of climates, soils, forests and crops.

• Longitudinal spread and the time-zone debate (GS-I/GS-III):

• About 2 hours of solar time separate Arunachal Pradesh from Gujarat [4].
• In the North-East, the sun rises early, so daylight hours are lost under a single clock and more energy is used. This drives the demand for a separate time zone.

• The IST Rules, 2026 keep a single time zone under "One Nation, One Time" [6].

• Strategic and disaster-prone southern tip (GS-III):

• Indira Point overlooks the Six Degree Channel, a major international shipping lane [2]. This makes Great Nicobar important for maritime security and port development.
• The 2004 tsunami, which partly submerged Indira Point, shows the disaster risk on this frontier [3].

Related concepts

• North-south and east-west distance of India
• Tropic of Cancer
• Extreme points of India
• Indira Point

Read more

• Latitudinal and longitudinal extent: where India lies on the globe