A breakdown of likely costs for building a 1,000-mile wall dwarfs Trump’s own estimates

$41bn

Total estimated cost

$10-12bn

Trump’s pre-election estimate

Concrete

This wall would have a volume of 9.7m cubic metres. One cubic metre could cost $900, totaling a spend of almost $9bn

 

Steel

2.3bn kilograms of steel would reinforce 3% of of the concrete needed. Steel costs could hit $4.6bn at around $2 per kilogram

 

Labour

Difficult desert and mountainous border terrain could push labour costs to two times the cost of materials

 

Person

to scale

1ft

thick

1,000

miles long

10ft

below ground

50ft

above ground

... it could

cost

Assuming

the wall is ...

Up to

$27.2bn

$4.6bn

$10-12bn

Trump’s pre-election estimate

$41bn

$9bn

Total estimated cost

Difficult desert and mountainous border terrain could push labour costs to two times the cost of materials

2.3bn kilograms of steel would reinforce 3% of of the concrete needed.

 

Steel costs could hit $4.6bn at around $2 per kilogram

 

This wall would have a volume of 9.7m cubic metres.

 

One cubic metre could cost $900, totaling a spend of almost $9bn

Person

to scale

1ft

thick

1,000

miles long

10ft

below ground

50ft

above ground

Assuming

the wall is ...

Labour

Steel

Concrete

... it could cost