Calculadora de hormigón para postes

Cómo funciona esta calculadora

Hole volume = pi x (diameter / 2)^2 x depth. Net volume = hole volume - post volume. Bags = round up(total liters / yield per bag).

Ejemplo resuelto

A 30 cm diameter, 60 cm deep hole with a 10 cm square post needs about 36 L of concrete per hole - 2 bags at 20 L yield.

Suposiciones a comprobar

The hole is a cylinder and the post is square in cross-section, centered in the hole.
Bag yield must come from the product label; it differs between postcrete-style fast-set mixes and standard premix concrete.
A post width of 0 models a footing-only hole with no post volume subtracted.

Lee la metodología de cálculo y control de calidad →

Preguntas frecuentes

How deep should a fence post hole be?

A common rule of thumb is about one-third of the post length above ground, but check local soil, wind exposure, and fence height guidance before digging.

Postcrete vs. standard premix - does the formula change?

No, the volume math is identical. Only the bag yield (liters set per bag) changes, so update that field to match your product.

Why is the volume "net" of the post?

The post itself displaces space in the hole, so only the remaining volume around it needs to be filled with concrete.