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Delhi nuclear blast radius

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This scenario places a 15 kt airburst on Delhi’s colonial-era commercial core. The National Capital Region is far larger than these rings; the page is about the centre, not the whole metro.

Open Delhi in the 3D simulator

Educational estimate only. Blast and heat rings use simplified yield scaling. They ignore terrain, weather, shielding, and weapon design. Casualty counts use WorldPop 2020 residents on an approximately 1 km grid and ignore time of day, commuting, shelter, and evacuation. This is not a targeting or civil-defense tool. About the model.

Aim point: Connaught Place / New Delhi core · Weapon: Little Boy (15 kt, 543 m (1,780 ft) optimum airburst)

Ground ranges for Little Boy (15 kt, 543 m (1,780 ft) optimum airburst) in this simulator.
Effect Ground range What the model means
Fireball 266 m (872 ft) Maximum luminous radius
20 psi 839 m (2,751 ft) Heavy destruction
5 psi 1.8 km (1.1 mi) Most buildings collapse
Thermal 2.0 km (1.3 mi) 3rd-degree burns
1 psi 4.2 km (2.6 mi) Windows shatter
Rings scaled to 1 psi. Yellow fireball, red 20 psi, orange 5 psi, gold thermal, blue 1 psi. Not a map of buildings.

Casualty estimate at this pin

People on the WorldPop 2020 grid inside this scenario’s 1 psi ring. Rounded educational estimate, not a forecast.
Estimated deaths 73,094
Estimated injuries 244,456
Residents inside 1 psi 875,142

What the rings cover

Fireball and heavy-destruction rings sit on the Connaught Place circle and neighbouring government and commercial blocks. 5 psi reaches across a slice of central New Delhi. 1 psi is still small against the full NCR sprawl.

The pin aims at Connaught Place, a dense mixing of offices, hotels, and transit rather than a residential colony on the fringe. WorldPop 2020 still sees that as a populated 1 km cell, which is what the casualty line is counting.

Delhi’s planned avenues make the 2D rings look tidy. In 3D you can see that a few kilometres of blast radius is the distance from the core to parts of Old Delhi or the river — not the distance to Gurgaon or Noida.

For a much larger yield, use a named strategic weapon in the simulator. This page keeps Little Boy so Delhi can be compared with Tokyo, London, and New York on the same scale.

Related pages

Mumbai · Dhaka · Cairo · London

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