Enter a dry weight or a volume to convert between dry ounces and teaspoons using ingredient density.
Assumptions Assumptions
- Conversions are between weight (dry ounces) and volume (teaspoons) using ingredient bulk density (g/mL).
- Ounces are avoirdupois (1 oz = 28.349523125 g); this is not fluid ounces.
- Unit standards: US tsp = 4.92892 mL; Metric tsp = 5 mL; US tbsp = 14.7868 mL = 3 US tsp.
- Measurements assume level spoons and typical packing (e.g., brown sugar is packed).
- Densities vary by brand, grind, and humidity; results are estimates suitable for cooking, not lab work.
- For highest accuracy in baking, weigh ingredients rather than converting to volume.
When to Use This Calculator
- Converting recipe weights to spoon measures when you don’t have a scale.
- Standardizing measurements across US and metric teaspoons/tablespoons.
- Accounting for different salt types (e.g., Morton vs. Diamond Crystal) by density.
Input Definitions
- Ingredient — selects an approximate density (g/mL); choose “Custom” to enter your own.
- Dry Ounces — weight input; select oz, g, or lb.
- Teaspoons — volume input; select US or metric tsp, US tbsp, or mL.
- Conversions — tsp = (oz × 28.349523125 ÷ density) ÷ 4.92892; oz = (tsp × 4.92892 × density) ÷ 28.349523125.
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Dry Ounce to Tsp Formula
The following formulas convert dry ounces (weight) to teaspoons (volume) and back using ingredient density.
\mathrm{tsp_{US}} \;=\; \frac{m_{\mathrm{oz}}\times 28.349523125}{\rho\;(\mathrm{g/mL}) \times 4.92892}- 1 ounce (avoirdupois) = 28.349523125 g
- US teaspoon = 4.92892 mL
- Metric teaspoon = 5 mL
- US tablespoon = 14.7868 mL = 3 US tsp
- ρ (density) is ingredient-specific in g/mL (see calculator presets)
Dry Ounce to Tsp Conversion Table
| Ingredient | US tsp per 1 oz |
|---|---|
| All-purpose flour | 10.852 |
| Granulated sugar | 6.807 |
| Brown sugar (packed) | 6.185 |
| Powdered sugar | 11.503 |
| Cocoa powder | 15.977 |
| Table salt | 4.793 |
| Kosher salt (Morton) | 5.752 |
| Kosher salt (Diamond) | 10.093 |
| Baking powder | 7.102 |
| Baking soda | 6.185 |
| Rolled oats | 15.136 |
| White rice (uncooked) | 7.374 |
| Almond flour | 14.028 |
| Cornstarch | 10.651 |
| * Calculations use approximate densities; 1 oz = 28.3495 g, 1 US tsp = 4.92892 mL. | |
How do you convert dry ounces to teaspoons? Multiply ounces by 28.349523125 to get grams, divide by the ingredient’s density (g/mL) to get mL, then divide by the teaspoon size (4.92892 mL for US or 5 mL for metric).
How do you convert teaspoons to dry ounces? Multiply teaspoons by the mL per teaspoon (US: 4.92892; metric: 5), multiply by density (g/mL) to get grams, then divide by 28.349523125 to get ounces.
Example Problem
Convert 2.5 oz of granulated sugar to US teaspoons.
Using density ρ = 0.845 g/mL and US tsp = 4.92892 mL: tsp = (2.5 × 28.349523125 ÷ 0.845) ÷ 4.92892.
tsp ≈ 17.02 US tsp
