Concrete for Post-Setting Calculator

Work out how many bags of post-mix concrete you need before you start digging.

Default assumes a standard 20 kg fence-post concrete mix bag — check your own bag for its stated yield and adjust if different.
Calculations are approximate. Treat as an estimate.

More Fencing & Infrastructure calculators

Tank / Trough Volume Calculator
Work out the volume in litres of a tank or trough from its dimensions — cylindrical or rectangular.
Gate & Gateway Calculator
Work out gates, hinges, latches and posts needed across a set of gateways.
Paddock Perimeter Estimator Uses your farm data
Estimate fence length to enclose or subdivide a field, starting from just its area.
Roof Sheeting Calculator
Work out how many roof sheets you need for a shed or lean-to, from roof area.
Bale Wrap / Net Wrap Calculator
Work out how many rolls of bale wrap or net wrap you need for a given number of bales.
Cubicle / Housing Capacity Calculator
Estimate how many animals a shed can house, based on floor area and space allowance per head.
Silage Pit Cover Sheet Calculator
Work out the cover sheet size you need for a silage pit, including overlap allowance.
Concrete Area Calculator
Work out how much concrete you need for a yard, shed base or apron, in m³ or bags.