Ready Reckoner to Calculate Compost Usage

The figures given are offered as a guide only, as various factors such as type of handling, methods of filling and moisture content can affect the results.

Container size or type
(diameter)
Capacity per pot or trays
(litres)
Average number of pots or trays filled per m³

Nursery Stock Pots
12.9 cm 1.0 950
16.2 cm 2.0 475
19.0 cm 3.0 310
20.9 cm 4.0 235
22.5 cm 5.0 190
28.3 cm 10.0 95

Pot Plant Pots
6.5 cm 2 ½"
0.13 7,300
8.0 cm 3 "
0.23 4,100
9.0 cm 3 ½"
0.37 2,500
10.0 cm 4 "
0.45 2,100
12.7 cm 5 "
1.10 860
15.5 cm 6 "
1.80 530
21.5 cm 8 "
4.80 190
26.5 cm 10 "
9.40 95

Seed Trays
Half size 1.75 540
Full size 3.60 260

Multi-cell Trays
Cells per tray Capacity per Cell (ml) Trays filled per m³
330 8 350
308 16 190
228 22 190
198 30 160
77 60 200