Divide the servings you need by the servings in the recipe, then multiply every amount by that number. From 4 to 6 servings means everything times 1.5: 250 g spelt flour becomes 375 g spelt flour. Paste your ingredient list and the scaler converts each line, rounds like a cook would and leaves “to taste” as it is.
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Divide the servings you need by the servings in the recipe, then multiply every amount by that number. From 4 to 6 servings means everything times 1.5: 250 g spelt flour becomes 375 g spelt flour. Paste your ingredient list and the scaler converts each line, rounds like a cook would and leaves “to taste” as it is.
Scaled recipe
× 1.5 every amount
From 4 to 6 servings.
375 g Spelt flour
4 ½ Eggs
600 ml Milk
¾ tsp Baking powder
1 ½ tbsp Honey
1 pinch Salt
cinnamon to taste (to taste, unchanged)
3 tbsp Butter for frying
Converted: 7 of 8 lines
Half an egg: beat one egg and use half of it.
Go easy on salt and spices: start with a little less and season to taste at the end.
The scaler doesn’t change baking times or tin sizes. For more or less cake batter, the cake tin size converter finds the right tin.
Your recipe
The calculator asks for:
Recipe serves (servings)
You need (servings)
Ingredients: One ingredient per line, amount first, for example “200 g flour”.
The calculation runs in your browser. Your details are not saved and not sent anywhere.
Recipe scaling factor chart
Multiply every amount by this factor.
Factor by servings
Recipe serves
for 1
for 2
for 4
for 6
for 8
2
× 0.5
× 1
× 2
× 3
× 4
4
× 0.25
× 0.5
× 1
× 1.5
× 2
6
× 0.17
× 0.33
× 0.67
× 1
× 1.33
8
× 0.13
× 0.25
× 0.5
× 0.75
× 1
How the scaler rounds
Examples from 4 to 6 servings, so times 1.5.
Rounding with examples
In the recipe
For 6 servings
Rounded
125 g butter
190 g butter
grams and ml from 100: to 5
45 g oats
68 g oats
grams and ml up to 100: whole
3 g salt
4.5 g salt
grams and ml under 10: to the half
1 kg potatoes
1.5 kg potatoes
kg and litres: to 0.1
1 tbsp olive oil
1 ½ tbsp olive oil
spoons under 2: to the quarter, then the half
1 tin chickpeas (400 g)
1 ½ tins chickpeas (400 g)
tins, bunches, pieces: like spoons
2 x 400g tins chopped tomatoes
3 × 400 g tins chopped tomatoes
packs: number × size
750 ml milk
1,125 ml milk
from 1,000 g or ml: with a comma
1 lb potatoes
1 ½ lb potatoes
lb: whole ounces, on a quarter pound in lb
8 oz butter
12 oz butter
oz: whole (under 4 to the half), from 16 oz in lb and oz
1 pinch of salt
1 pinch of salt
pinches: whole
3 eggs
4 ½ eggs
eggs: to the half
salt and pepper to taste
salt and pepper to taste
no amount: stays
How the calculator works
Factor = servings you need ÷ servings in the recipe. The scaler multiplies every amount by this factor.
It reads numbers with a decimal point, fractions such as ½ and 1/2, ranges such as 2–3, thousands such as 1,000 g, packs such as “2 x 400g tins” and the usual units: g, kg, ml, l, lb, oz, fl oz, pint, tbsp, tsp, pinch, clove, bunch, tin, can, packet, sachet, cup and more.
It rounds like the recipe pages of the SmarTasty app: grams and ml under 10 to the half, under 100 to whole numbers, from 100 to 5; spoons, bunches, tins and pieces under 2 to the quarter, from 2 to the half; pinches to whole ones. Less than ¼ spoon stays exact, for example ⅛ tsp. Under 1 kg or 1 litre it switches to g or ml. Pounds are worked out in whole ounces: on a quarter pound it shows lb (¾ lb), otherwise oz (6 oz, 1 lb 2 oz). Ounces go to whole ones (under 4 to the half), pints to the quarter. With two measures such as “450g/1lb” both are scaled. For the same number of servings every amount stays as written.
Eggs are rounded to half an egg, with the exact amount shown next to them.
Lines without an amount at the start, such as “salt and pepper to taste”, stay as they are. It all runs in your browser.
Example: Pancakes for 4, you need 6:
Factor: 6 ÷ 4 = 1.5
250 g spelt flour × 1.5 = 375 g spelt flour
3 eggs × 1.5 = 4 ½ eggs: beat one egg and use half
1 pinch of salt stays at 1 pinch, “cinnamon to taste” stays as it is
Good to know
Go easy on salt and spices: start with a little less and season to taste at the end.
For cakes: more batter needs a bigger tin. The cake tin size converter finds the right one. If the batter sits deeper than in the recipe, it needs longer: check with a skewer.
For roasts, the core temperature matters, not the minutes in the recipe.
Twice the amount often won’t fit in the same pan: cook it in two batches.
Frequently asked questions
How do I scale a recipe up?
Divide the servings you need by the servings in the recipe and multiply every amount by the result. From 4 to 6 servings the factor is 1.5: 250 g spelt flour becomes 375 g spelt flour.
How do I halve a recipe?
Halve every amount, the factor is 0.5. 250 g spelt flour becomes 125 g spelt flour and 400 ml milk becomes 200 ml milk. With 3 eggs you get 1 ½: beat one egg and use half of it.
What do I do with half an egg?
Beat one egg and use half. The scaler rounds eggs to the half and shows the exact amount: 3 eggs for 4 are exactly 2.25 eggs for 3 servings, shown as 2 ½ eggs.
Do I need to change the baking time?
The scaler doesn’t change baking times. If the batter sits as deep in the new tin as in the recipe, the time changes little. If it’s deeper, it needs longer: check with a skewer. The cake tin size converter finds the right tin.
Can I just scale the spices?
You can, and the scaler does. But season carefully: start with a little less and taste at the end. Pinches are rounded to whole ones.
Which lines aren’t converted?
Lines without an amount at the start, for example “salt and pepper to taste” or “juice of 1 lemon”. They stay as they are and are marked so you can check them yourself.
Is my ingredient list saved?
No. The scaler works in your browser and sends nothing.