Recipe Scaler & Unit Converter
Scale recipe ingredients by servings and convert tbsp, tsp, ml and g. Everything stays in your browser.
How to Use the Recipe Scaler
Enter the original serving count, the new serving count and one ingredient per line. Amounts scale live, so you can double a recipe, halve a batch or resize a family recipe without recalculating each ingredient by hand.
The scaler looks for numeric amounts at the start of each ingredient line and keeps the unit and ingredient name in place. It works well for common recipe lines such as 200g pork, 2 tbsp soy sauce and 1.5 cups flour. Use the Unit Converter when you also need tablespoon, teaspoon or millilitre conversions.
Example (2 โ 4 servings)
200g pork โ 400g pork
2 tbsp soy sauce โ 4 tbsp soy sauceGood For
- Scaling a dinner recipe from 2 servings to 4, 6 or 8 servings.
- Reducing a baking test batch before committing to the full quantity.
- Resizing ingredient lists copied from a note, blog post or cookbook draft.
Supported input and practical limits
Each line must start with an integer, decimal, or simple fraction such as 1/2. A line such as โsalt to taste,โ a range such as โ1โ2 eggs,โ or a mixed fraction such as โ1 1/2 cupsโ is left unchanged instead of being guessed. Review the output before cooking.
Ingredient quantities can be scaled mathematically, but cooking time, pan area, oven temperature, evaporation, seasoning, and whole eggs do not always change in the same ratio. Treat the result as a starting point and adjust for the equipment and recipe.
Grams measure mass while millilitres measure volume, so direct conversion needs the ingredientโs density and is intentionally unavailable. For other measurements use the Unit Converter; for Japanese rice portions use the Rice Cup & Water Calculator.
Japanese spoon and cup conversion table
A Japanese tablespoon is 15 ml and a teaspoon is 5 ml. Cups differ by country: 200 ml in Japan, 240 ml in the US, so pick the one your recipe assumes.
| Unit | ml | In teaspoons | In tablespoons |
|---|---|---|---|
| Tablespoon (Japan) 1 | 15 ml | 3 tsp | 1 tbsp |
| Tablespoon 1/2 | 7.5 ml | 1.5 tsp | 0.50 tbsp |
| Teaspoon (Japan) 1 | 5 ml | 1 tsp | 0.33 tbsp |
| Teaspoon 1/2 | 2.5 ml | 0.5 tsp | 0.17 tbsp |
| Cup (Japan) 1 | 200 ml | 40 tsp | 13.33 tbsp |
| Cup (US) 1 | 240 ml | 48 tsp | 16 tbsp |
Scaling factors when the serving count changes
What a straight multiplication does to a 200 g ingredient and a 15 ml (1 tbsp) seasoning.
| Servings | Factor | 200 g ingredient | 1 tbsp seasoning |
|---|---|---|---|
| 2 โ 1 | ร0.5 | 100 g | 7.5 ml |
| 2 โ 3 | ร1.5 | 300 g | 22.5 ml |
| 2 โ 4 | ร2 | 400 g | 30.0 ml |
| 2 โ 6 | ร3 | 600 g | 45.0 ml |
| 4 โ 2 | ร0.5 | 100 g | 7.5 ml |
| 4 โ 6 | ร1.5 | 300 g | 22.5 ml |
| 4 โ 8 | ร2 | 400 g | 30.0 ml |
| 3 โ 4 | ร1.33 | 266.7 g | 20.0 ml |
Grams and millilitres are not interchangeable: the same volume weighs a different amount depending on the ingredient. Seasoning and cooking time do not always scale at the same rate as quantity, so treat the numbers as a starting point and taste as you go.