Tool
Fresh-to-Dried Herb Converter
Convert fresh herbs to dried and back, per herb, in cups or spoons — with an honest read on which herbs survive drying and which lose the plot entirely.
Fresh-to-Dried Herb Converter
Fractions welcome: 1/2, 1 1/4, ¾.
One tablespoon of fresh basil is 1 tsp dried.
1 tablespoon fresh basil = 1 tsp dried
1
Teaspoons
0.33
Tablespoons
0.02
Cups
Basil: loses a lot in drying
This herb loses most of what makes it taste like itself when dried — the measurement is right, but expect a different dish.
Basil is the clearest case of a correct measurement giving a disappointing result: its aroma is carried by fragile top notes that largely evaporate during drying, so dried basil reads as a generic warm-herb background rather than as basil. Use the 3:1 swap in a long-simmered sauce where it has time to bloom, and buy fresh for pesto, caprese, or anything where basil is the point.
Ratio used: 3:1 fresh to dried, by volume. One medium sprig strips to roughly 1 tsp of fresh leaves.
Basil storage, shelf life and substitutions →
Herb ratios are the tip of it — get one monthly email of kitchen conversions worth keeping.
Fresh herbs and their dried counterparts aren't the same ingredient at two different moisture levels — drying concentrates an herb's essential oils while also changing its flavor character, which is why the standard kitchen rule of thumb for converting between them is a ratio, not a simple weight adjustment.
This tool works herb by herb rather than applying one multiplier to everything. The widely used 3:1 conversion (3 parts fresh to 1 part dried, by volume) is the right answer for nearly every leafy herb and stays the baseline — but bay breaks it outright, because bay leaves are counted rather than measured and one fresh leaf swaps for one dried, and sage's two dried forms sit at different densities in the spoon.
It also answers the question in the units it's actually asked in. Recipes call for half a cup of chopped fresh cilantro, not twenty-four teaspoons, so you can work in cups, tablespoons or teaspoons and the result comes back stated the way you'd write it on a list — "2 tbsp + 2 tsp" rather than a bare decimal you then have to divide by three at the counter.
And every herb carries an honest read on whether the swap is worth making at all. A ratio tells you the quantity; it does not tell you the result. Rosemary and oregano come through drying almost intact, and dried oregano is arguably the better ingredient. Basil, cilantro, parsley and chives lose most of what makes them taste like themselves, and no quantity of the dried version rescues a dish that was built around the fresh one.
How the Fresh-to-Dried Herb Converter works
The 3:1 rule exists because drying doesn't just remove water — it also concentrates the herb's aromatic oils into a smaller volume, so a teaspoon of dried herb packs a more potent, if less complex, punch than a teaspoon of fresh. Converting from fresh to dried divides the fresh amount by 3; converting from dried to fresh multiplies by 3. This is a volume ratio, not a weight ratio, since fresh herbs are mostly water by weight in a way dried herbs aren't.
The tool also builds in a rule for WHEN in cooking to add each form: dried herbs generally go in earlier, since they need time in a liquid or fat to rehydrate and release their concentrated flavor, while fresh herbs (especially delicate ones like basil, cilantro, and parsley) are best added near the end of cooking or as a raw garnish, since heat destroys their brighter, more volatile aromatic compounds quickly.
For herbs where the tool flags the standard ratio as unreliable — basil, cilantro, dill, and chives among them — it notes that dried versions taste distinctly different rather than just weaker, so even a perfectly executed 3:1 conversion won't taste like the fresh version, only echo it.
Worked example: a recipe calling for 1 tablespoon fresh rosemary, but you only have dried
Applying the 3:1 ratio: 1 tablespoon fresh ÷ 3 = 1 teaspoon dried rosemary. Rosemary is one of the herbs where this swap works especially well, since its woody, resinous character survives drying better than a delicate leafy herb's does — the dried version reads as genuinely similar, just more concentrated, rather than as a different flavor entirely.
Now the reverse, and a case worth flagging: a recipe calls for 1 teaspoon dried basil, and you want to use fresh instead. The straight math gives 1 tablespoon fresh basil (1 tsp × 3), but basil's flavor changes so much in drying — losing its bright, peppery, almost anise-like fresh notes for a more muted, hay-like dried flavor — that the tool notes this conversion gets you a comparable INTENSITY of basil flavor, not the same flavor.
Edge cases this tool handles correctly
- Herbs that don't really have a dried form worth using
- Fresh chives and fresh parsley both lose most of what makes them worth using — chives their oniony bite, parsley its clean, grassy freshness — when dried, to the point where many cooks skip the dried version of these two herbs entirely rather than rely on a 3:1 conversion that undersells how much flavor is actually lost.
- Herb blends aren't a single-herb conversion
- A recipe calling for "2 tablespoons fresh Italian herbs" or a similar blend isn't something this tool converts directly, since blends combine multiple herbs (usually basil, oregano, thyme, and rosemary in varying ratios) that don't all convert or age identically — better handled by converting each component herb separately if the blend's exact makeup is known.
- Ground vs. leaf dried herbs
- A finely ground dried herb packs roughly twice as much into a level teaspoon as the fluffy rubbed version of the same herb, so the 3:1 ratio assumes a standard dried-leaf or rubbed product. Sage is the common case and the tool gives both figures side by side: measure ground sage as though it were rubbed and you have doubled the dose.
- Bay leaves don't take the ratio at all
- Bay is counted, not spooned — one fresh leaf for one dried leaf. Dried bay is also not the weaker ingredient here: Turkish bay is often described as rounder dried than fresh, and fresh California bay is strong enough that cooks tend to use less of it rather than more. The tool switches to leaves as the unit automatically when you pick bay, because a teaspoon of bay leaf is not a thing anyone measures.
Frequently asked questions
Why is it 3:1 and not some other ratio?
It's an empirically settled kitchen convention, not a strict scientific formula — professional recipe testing over many years converged on 3:1 as a reliable enough approximation for the flavor-concentration effect of drying most common culinary herbs, even though the exact ratio genuinely varies somewhat herb to herb.
Does the 3:1 ratio apply to whole dried herbs or crushed/rubbed ones?
It's generally based on crushed or rubbed dried herb, the more common grocery-store form — whole dried leaves (like whole bay leaves or whole dried oregano leaves before crushing) take up more volume for the same amount of actual herb material, so crushing them first gives a more accurate conversion.
Should I add dried or fresh herbs first when cooking?
Dried herbs generally go in earlier in cooking, giving them time in the liquid or fat to rehydrate and release flavor; fresh herbs — especially delicate ones — are usually best added in the last few minutes or as a raw garnish, since prolonged heat breaks down their more volatile fresh aromatics.
Is dried herb weaker than fresh, or just different?
Both, depending on the herb — woody herbs like rosemary, thyme, and oregano hold up reasonably well dried and mostly just lose some potency and brightness, while delicate leafy herbs like basil and cilantro change character more fundamentally, tasting distinctly different rather than simply like a fainter version of fresh.