Increase A Recipe – Made Simple

Overhead shot of various sized cake tins, pie dishes etc on a blue backdrop with title increasing recipes with worked examples

Increase A Recipe – Made Simple

By Caro

Here's how to increase a recipe & it's ingredients, to fit a bigger sized tin. Includes worked examples & works for cake tins, pie tins etc. 

Ovdrhead of stacked various sized round cake and pie dishes with title Increase a recipe to fit a bigger dish.

Running some Facebook baking groups & having a degree in Mathematics, I am often asked about scaling recipes. Doubling or halving a recipe is simple enough, but when it comes to wanting to use a different sized tin or dish, people often make guesses and are in the end disappointed with the results.

How Do You Increase A Recipe To Fit A Bigger Tin?

I often hear asked – “How to scale up a recipe?”, “How do you resize a recipe?” and questions like “How do you adjust baking ingredients?”.

The process to increase a recipe, has 2 steps: calculating how much bigger the new tin size is, and increasing the recipe ingredients accordingly.

Shot above of a blue enamal pie dish with print the adventure begins.

More Reasons To Read On

But my help doesn’t just stop there. I also provide worked examples using my factor or formula to increase a recipe. AND I show how to use it when working with measuring cups & measuring spoons. This is much more difficult for people to work out, but I have developed a simpler method.

There’s even a video to show you how to do the calculations.

And you can download the entire article too, by clicking ‘download’ below:

Shot fo wooden table and various sized cake and pie round tins and title reducing a recipe to a small sized dish.

Down-sizing A Recipe For A Smaller Tin

I also have an article on decreasing or down-sizing a recipe to a smaller tin, for cakes and pies etc. For that I also have a quick video showing me do some worked examples. The principle for increasing a recipe is exactly the same. The only difference is the number you multiply the ingredients by. Go to How To Reduce A Recipe For A Smaller Dish.

FAQs Relating To Increasing A Recipe

Before you get to the recipe, (or in this case tables), the writer will provide all the information you need and often include answers to commonly asked questions. So below I have included answers to some frequently asked questions that always arise when you want to increase a recipe to a bigger sized dish or tin.

Q1. Will the cooking time be longer for baking in a bigger tin?

Baking time in a wider tin or dish, will not affect the bake time. Only if the depth of the cake is more than the original recipe intended, then the cake will take a little longer to bake. Note though that if you use a recipe in a wider tin and don’t increase the ingredients, your level of batter for example, will be shallower, and the cooking time should be reduced.

Q2. Should I adjust the cooking temperature when using a bigger tin?

No need to adjust the original recipe temperature when increasing a recipe. (Same applies if reducing a recipe). I always advise on purchasing an inexpensive thermometer to check what temperature your own oven is running at. This will help with your bake time and not over-bake. If for example, your oven is always running 20c higher than you set it for, lower the temperature 20c for future bakes and bake for the usual time. Similarly, if you find your oven running 20c lower than you set, increase it by 20c and bake as normal.

Q3. What If The Answers Are Not Whole Numbers?

If you increase the recipe ingredients using the formula, & it doesn’t come to a whole number, here’s an example of what to do.

If the answer for say flour is 258.61 g, then round to 259g.  

*Rule – When the number after the decimal point is 5 or higher, you round up to next whole number.  And if less than 5, reduce or round down, to the next lowest whole number.

So  374.21g would be 374g.  

Q4. What About Eggs?

When it comes to eggs, use  your judgement if it’s not a whole number.  The size of the egg will also play a part in this.  Adding half or 1/4 of an egg more, will not  make too much difference.

Round & Square Tins

To increase a recipe from a round tin to a larger round tin, uses the same formula for increasing from a square tin to another bigger square tin.  You can not use the formula to change to a different shaped tin. It can not be used to swap from say a 7″ round to 10″ square tin, as the 10″ square would have a bigger volume capacity than a round 10″.  I have however, included the formula to use for increasing from a round tin to a rectangular larger tin.  

Increase A Recipe


Here’s the factor you new to increase a recipe and it’s ingredients to fit a bigger sized tin. Works for cake tins and pie tins etc.

Increasing From A 4″ (10cm) Round Or Square Tin

5″/ 12.7cm Tin/dishx1.63
6″/15.2cm Tin/dish x2.33
7″/17.8cm Tin/dish x3.25
8″/20.3cm Tin/dishx4.11
9″/22.8cm Tin/dish x5.30
10″/25.4cm Tin/dish x6.47
Table 1 – Increasing from a 4″/10cm Cake Tin

Increasing From A 5″ (12.7cm) Round Or Square Tin

6″/15.2cm Tin/dish x1.43
7″/17.8cm Tin/dish x2.00
8″/20.3cm Tin/dishx2.52
9″/22.8cm Tin/dish x3.26
10″/25.4cm Tin/dish x3.97
Table 2 – Increasing from a 5″/12.7cm Cake Tin

Increasing From A 6″ (15.2cm) Round Or Square

7″/17.8cm Tin/dish x1.37
8″/20.3cm Tin/dishx1.78
9″/22.8cm Tin/dish x2.2
10″/25.4cm Tin/dish x2.79
Table 3 -Increasing from a 6″/15.2cm Cake Tin

Increasing From A 7″ (17.8cm) Round Or Square

8″/20.3cm Tin/dishx1.27
9″/22.8cm Tin/dish x1.63
10″/25.4cm Tin/dish x2.00
Table 4 – Increasing from a 7″/17.8cm Cake Tin

Increasing From A 8″ (20.3cm) Round Or Square

9″/22.8cm Tin/dish x1.29
10″/25.4cm Tin/dish x1.57
11″/27.9cm Tin/dish x1.90
12″/30.5cm Tin/dish x2.27
Table 5 – Increasing from a 8″/20.3cm Cake Tin

To Fill A Rectangular 9x13x2″ (23×31.2x5cm) Dish

Going from the original recipe size below & increasing to fit this large rectangular dish.

Recipe 8″/20.3cm x4.73
Recipe 9″/22.8cm x3.70
Recipe 10″/25.4cm x3.00
Recipe 11″/27.9cm x2.48
Recipe 12″/30.5cm x2.00
Table 6 – Increasing to a 9x13x2″/23×31.2x5cm Cake Tin

To Fill A Rectangular 11x14x1″ (28×35.5×2.54cm) Sheet Pan

Going from the original (round) recipe size below & increasing to fit this 1″/2.54cm deep Sheet Pan.

Recipe 9″/22.8cm x2.39
Recipe 10″/25.4cm x2.00
Recipe 11″/27.9cm x1.61
Recipe 12″/30.5cm x1.36
Table 7 – Increasing to an 11x14x1″/28×35.5×2.54cm Sheet Pan

Worked Examples

Ex1. Increasing from 4″ to 7″ – multiply by 3.25 (from Table 1 above)

Recipe is 63g flour & you need to increase by the factor found in Table 1 (3.25)

63 x 3.25 = 204.75 which becomes 205g Flour

For Flour in Ounces, 63g = 2¼ oz

Similarly, just multiply 2.25 x 3.25

Which equals 7.215 so answer is 7¼ oz flour

Ex2. Increasing from a 6″ to 10″ – multiply by 2.78 (from Table 3 above)

Recipe calls for 1 egg & you need to increase by the factor found in Table 3 (2.78)

1 x 2.78 = 2.78 which becomes 3 eggs

Ex3. Increasing from an 11″ round x 1″ deep to A Rectangular 9x13x2″ (23 x 31.2 x 10.1cm) 

-multiply by 2.48 (from Table 6 above)

 Recipe calls for ½ tsp cinnamon & you need to increase by 2.48

0.5 x 2.48 = 1.24 which becomes 1¼ tsp

Ex4. Increasing from a 9″ round x 1″ deep to Rectangular 11 x 14 x 1″

-multiply by 2.39 (from Table 7 above)

 Recipe is for 120ml Oil & to be multiplied by 2.39

120 x 2.39 = 286.9 which becomes 290ml but measuring 300ml would be fine.

Teaspoon Examples

Ex5. Recipe calls for ¼ tsp Baking Soda/Bicarbonate

And if the increase factor was 1.40 as in Table 3 above

¼ – 0.25 x 1.40 = 0.35 but how do you measure 1/3tsp?

 Think of ¼ tsp as the same as 2 x 1/8 tsp

 2 x 1.40 = 2.8 & becomes 3

Which is the same as 3 x 1/8 tsp or, ¼ tsp + 1/8 tsp

So even if you don’t have an 1/8tsp, you could measure one ¼ tsp & then half a ¼ tsp to be accurate.

Ex6. Another tsp example where the answer after multiplying is not clear.

2 tsp x 1.57 = 3.14 tsp, but what is 0.14 tsp?

Most people will just use 3 tsp, but if you use this other method, you will find the exact amount & have better results. Since baking is a science, accuracy is key.

2 tsp is same as 16 x 1/8 tsp

16 x 1.57 = 25.12  & round down to 25

25/8 tsp reduces down to 3 + 1/8 tsp which is easier to use.

So if you had went by the simpler method & left at 3tsp, you would have been 1/8 tsp short.

Increase A Recipe With Measuring Cups

For  measuring cups it’s not quite as easy, so purchasing an inexpensive digital scale, would be easier and actually more accurate.  Most come with grams and ounces as standard measurement units.  But if you only have measuring cups, here is some examples to guide you & increase a recipe. The smallest cup size is 1/8 cup & so using that we can increase the recipe more accurately. Don’t worry if you don’t have 1/8 cup, you can still half fill a ¼ cup.  

*Simplest example

 2 cups flour multiplied by 1.63 = 3.26

So answer would obviously be 3 ¼ cups flour.

 But not all answers after multiplying are so obvious:

Say ½ Cup Oil was to be multiplied by 2.28

 ½ cup = same as 4 x 1/8 cups

 So 4 x 2.28 = 9.12

 9.12/8 = 1.14 (use the calculator on your phone).

This equals 1 cup plus 14% of a cup (ie. 0.14)

 Now 1 cup = 240ml/8 fl oz & 14% = 33.6ml (ie 240×0.14)

 2 tbsp Oil = 30ml, so 2 tbsp is near enough.

Therefore, the exact answer is 1 cup + 2 tbsp oil.

That 2 tbsp oil might make the difference in whatever you are making.

Useful Numbers/Fractions

You can alternatively use the same principles as for the tsps section above to do calculations, but here are some handy numbers to refer to when you use a calculator just to simply multiply the cup amount by the increase factor & are left with a number you don’t know what it is exactly and don’t want to just guess. Also handy if you don’t have a 1/3 cup.

0.12 =1/8

0.25 = ¼

0.33 = 1/3 & also equals ¼ +1/8

0.5 = ½

0.66 = 2/3 & also equals ½ +1/8

(or use ½ c + half a ¼ c or, use ¼ cups & measure 2.5 times)

0.75 = ¾

0.87= ¾ + 1/8 (or ¼ cup x 3.5)

Here’s my video doing worked examples for reducing a recipe, that uses the same principles and technique.

Click here to watch Reducing A Recipe, on your own YouTube account.

Other Useful Information

1 Cup Liquid240ml
1 tsp Liquid5ml
1 tbsp3 tsp
1 tbsp Liquid15ml
1 Cup Flour 125g/4.5 oz
1 tbsp Flour8g
1 tbsp Butter15g
1 tbsp Sugar12.5g
Handy measuring conversions table

 More Conversions

For more ingredient conversions, please see my article on CONVERSION OF UK & US COMMON BAKING INGREDIENTS, complete with a handy table to save.

Various sized and types and colours of round cake tins & pie dishes.

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