Convert between fresh and dried herb quantities for any recipe. Accurate ratios for 25+ herbs including basil, thyme, rosemary, and oregano.
Substituting dried herbs for fresh (or vice versa) is one of the most common recipe adjustments, but getting the ratio wrong can make a dish taste flat or overwhelmingly herbaceous. The general rule of thumb is 1 teaspoon dried equals 1 tablespoon fresh (a 1:3 ratio), but this varies significantly by herb. Delicate herbs like basil and cilantro lose more flavor when dried and need a higher fresh-to-dried ratio, while robust herbs like rosemary and thyme retain their potency and need less adjustment.
Dried herbs are more concentrated than fresh because the dehydration process removes water (which makes up 80-90% of fresh herb weight) while preserving the essential oils that carry flavor. When you crush dried herbs between your fingers before adding them to a dish, you release those concentrated oils and get maximum flavor impact. Fresh herbs, on the other hand, bring brightness, color, and a different flavor profile — the volatile aromatics present in fresh herbs dissipate during drying.
This calculator goes beyond the simple 1:3 rule with herb-specific ratios researched from culinary science. Whether you're adapting a recipe because your garden is overflowing with basil or you ran out of fresh thyme and only have the dried jar, you'll get the precise conversion.
Eyeballing herb substitutions often results in bland dishes or herb overload. This calculator provides herb-specific ratios so your recipe tastes exactly right whether you're using fresh from the garden or dried from the pantry. Keep these notes focused on your operational context. Tie the context to the calculator’s intended domain. Use this clarification to avoid ambiguous interpretation.
Dried Amount = Fresh Amount ÷ Conversion Ratio. Standard ratio = 3:1 (3 parts fresh = 1 part dried). Herb-specific ratios: basil = 4:1 (loses more flavor when dried), rosemary = 2:1 (very potent dried), oregano = 3:1, thyme = 3:1, cilantro = not recommended dried (use 6:1 if needed). Weight conversion: 1 tbsp fresh ≈ 1 tsp dried ≈ 1-2 grams.
Result: 1.5 tsp dried basil
Basil has a 4:1 fresh-to-dried ratio (it loses more flavor during drying). 2 tablespoons fresh basil ÷ 4 = 0.5 tbsp = 1.5 teaspoons dried basil. Add dried basil early in cooking to rehydrate and bloom.
Not all herbs dry equally. **Robust herbs** like rosemary, thyme, and oregano have tough, woody leaves with resilient essential oils that survive dehydration well — they need only a 2-3:1 ratio. **Delicate herbs** like basil, cilantro, chives, and parsley have soft, water-rich leaves whose volatile flavors largely evaporate during drying — they need a 4-6:1 ratio, and some (like cilantro and chives) are so different dried that substitution is barely worthwhile.
Neither is universally better — they serve different purposes. **Dried herbs** excel in slow-cooked dishes where they have time to rehydrate and infuse: stews, soups, braises, marinades, and bread doughs. **Fresh herbs** shine in raw applications and quick-cooking dishes: salads, pesto, bruschetta, and finishing garnishes. Many professional recipes call for both: dried herbs cooked into the base for depth, and a fresh herb garnish for brightness and color at the end.
Start with the dried herbs you use most often. The essential five for most home cooks are: **oregano** (pizza, pasta, Greek), **thyme** (French cooking, roasts), **rosemary** (potatoes, bread, lamb), **cumin** (Mexican, Indian), and **paprika** (Hungarian, Spanish, BBQ rubs). Buy in small quantities from stores with high turnover, as pre-packaged dried herbs in supermarkets may have been sitting on shelves for months. For fresh herbs, keep basil, parsley, and cilantro on hand — they lose the most flavor when dried and are cheapest to buy fresh.
The standard rule is 1:3 — use one-third as much dried herb as fresh. So 1 tablespoon fresh = 1 teaspoon dried. However, herb-specific ratios give better results.
Yes, dried herbs are 2-4 times more concentrated because dehydration removes water while preserving essential oils. Using the same amount of dried as fresh will result in an overly strong, sometimes bitter flavor.
Add dried herbs early in cooking (with oils, onions, etc.) so they rehydrate and release flavor. Add fresh herbs at the end of cooking or as a garnish to preserve their bright, volatile aromatics.
Dried cilantro is a very poor substitute for fresh — it loses most of its characteristic flavor. If possible, use fresh parsley with a squeeze of lime instead. If you must use dried, use a 6:1 ratio.
Dried herbs retain potency for 1-3 years in airtight containers away from heat and light. Ground herbs lose flavor faster (6-12 months). Rub between your fingers — if it smells weak, double the amount.
Yes. Powdered herbs are even more concentrated than dried leaf herbs. Use about half the amount of powdered as you would dried leaf. So: 1 tbsp fresh = 1 tsp dried leaf = ½ tsp powdered.