Stem Count Calculator

How many stems a vase arrangement needs, from the opening diameter, the density you want and the bunch size.

Type of arrangement

Vase opening diameter cm

Measured across the inside of the rim. A narrow necked vase holds fewer stems than a wide one of the same height.

Stems per centimetre of opening for the basic spacing stems per cm

One stem per 2.5 cm is 0.4 stems per centimetre, which is the spacing rule for large blooms such as hydrangeas and lilies.

Diameter of one flower head cm

A hydrangea is 15 to 20 cm, a rose 8 to 10, a spray rose head 5 to 7, a carnation 5 to 6.

How full you want it times

One is a standard full arrangement, 0.8 is light and airy, 1.3 is dense and domed.

How many arrangements

Stems in one wholesale bunch

Wholesale flowers commonly come in bunches of 10 or 25.

Focal flowers as a share of the stems %

Larger, more expensive blooms. Twenty percent is a working figure, more for a formal arrangement.

Price per stem

Your own figure. Flower prices move with the season, the variety and the market.

Reset

Free calculator by Handcraft worked examples and methodology No account, nothing stored.