Spice Scaling Calculator

Spice scaling adjusts seasoning quantities when increasing or decreasing a recipe’s yield. While most ingredients scale linearly (double the batch = double the ingredient), spices follow a non-linear scaling rule — strong spices like chili, cayenne, and black pepper are never doubled exactly when doubling a recipe, because their perceived intensity is disproportionate at higher concentrations.

Linear scaling formula (for most ingredients): Scaled Amount = Original Amount × (New Servings ÷ Original Servings)

Non-linear spice scaling (recommended for strong spices): Scaled Spice = Original Spice × (Scale Factor)^0.75

Where:

• Original Amount — the quantity in the original recipe
• New Servings — your target batch size
• Original Servings — the recipe’s intended yield
• Scale Factor — New Servings ÷ Original Servings
• ^0.75 — the empirical exponent for strong flavor compounds (recommended by culinary science; use ^0.65 for very pungent spices like cloves and star anise)

Practical multipliers for doubling (×2 scale factor):

• Mild herbs (parsley, chives): use ×2.0 (linear)
• Moderate spices (cumin, coriander, paprika): use ×1.8
• Strong spices (black pepper, ginger, turmeric): use ×1.65
• Very strong/hot (cayenne, chili flakes, cloves): use ×1.5

Salt is also non-linear:

• ×1.75 when doubling (not ×2.0)

Worked example: Original recipe serves 4, using: 1 tsp cumin, ½ tsp cayenne, 2 tsp paprika, ¾ tsp salt. Scaling to serve 12 (scale factor = 3).

• Cumin (moderate): 1 tsp × (3)^0.75 = 1 × 2.28 = ~2¼ tsp
• Cayenne (very strong): ½ tsp × (3)^0.65 = 0.5 × 2.0 = ~1 tsp
• Paprika (moderate): 2 tsp × (3)^0.75 = 2 × 2.28 = ~4½ tsp (~1½ tbsp)
• Salt: ¾ tsp × (3)^0.80 = 0.75 × 2.41 = ~1¾ tsp

Always taste and adjust at the end — these are starting points, not final answers.