Tincture & Extract Calculator

Centaury Tincture (Centaurium erythraea)

This page shows the sourced preparation standard for a Centaury tincture — the herb-to-menstruum ratio and ethanol strength drawn from a cited pharmacopoeial monograph — and pre-loads those values into the yield calculator so you can scale them to your own harvest.

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✓ Sourced preparation standardCentaurium erythraea

1:5herb : menstruum

70%ethanol (V/V)

Method confidenceSupported

In the EU, the EMA HMPC herbal monograph defines a standard centaury (Centaurium erythraea) herb tincture as a 1:5 preparation in ethanol 70% V/V.

Source: European Union herbal monograph on Centaurium erythraea Rafn. s.l., herba

These sourced values are pre-loaded into the calculator below.

Full Centaury monograph →All herbs in the calculator →

Interactive Tools

Estimate the dried weight of your harvest, the menstruum (solvent) you’ll need, and the likely shelf life — and, for a growing list of herbs, load the sourced, cited preparation standard instead of a generic default.

Your herb optional — pick a herb to load its sourced ratio & solvent strength with a citation

Fresh herb weight weigh your plant material straight after harvest

Plant part different tissues hold different amounts of water

Extraction method

A note on the numbers. Fresh plant material is roughly 70–90% water, so the dried-weight figure is an estimate based on the plant part you select. When you pick a herb with a sourced standard, the ratio and solvent strength come from a cited pharmacopoeial monograph and carry a method-confidence rating; otherwise the tool uses general defaults (1:5 ratio, 75/25 glycerite, 40% alcohol) that are not herb-specific. Always finish to your own preparation standards.

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