Manure Aging Calculator

Inputs

Start date

Used to estimate a ready date.

Manure type

Different manures start with different nitrogen levels.

Aging method

Hot composting is faster when managed well.

Average pile temperature (°C)

Typical hot piles run near 50–65°C.

Moisture (%)

Aim for about 50–60% moisture.

Carbon-to-nitrogen ratio (C:N)

A balanced mix often targets 25–30.

Pile volume (m³)

Very small piles lose heat quickly.

Turning frequency (times per week)

More turning increases aeration and speed.

Carbon amendment (%)

Straw, leaves, sawdust, or wood chips.

Curing option

Curing improves stability before garden use.

Curing days (manual)

Use 30–90 days for most gardens.

Reset

Tip: if the pile stays cold, increase volume and carbon structure.