Pie, tart and flan tin size conversion charts

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Pastry case made in 28cm Silverwood fluted flan tin

Pie, tart or flan conversion charts

These tables show the amount of shortcrust pastry needed for pie, flan and tart tins or rings of differing diameters so that you can adapt recipes for the tins you already have, rather than buying new ones. If your tin is deeper than average then you will need to increase the quantities slightly. Note, you may need to reduce or increase the temperature and cooking time if there is a large difference between the original product diameter and the one you are making.

To convert the amount of mixture you need for fillings (by volume) between different tin sizes, please refer to our Cake tin conversion charts page'

TIN SIZE AMOUNT OF PASTRY (BASE & SIDES) FLOUR FAT SALT AMOUNT OF PASTRY (BASE, SIDES & LID) FLOUR FAT SALT
13 cm / 5 inch 135g 90g 45g 1.8g 210g 140g 70g 2.8g
15 cm / 6 inch 180g 120g 60g 2.4g 270g 180g 90g 3.6g
18 cm / 7 inch 225g 150g 75g 3g 340g 225g 115g 4.5g
20 cm / 8 inch 270g 180g 90g 3.6g 405g 270g 135g 5.4g
23 cm / 9 inch 315g 210g 105g 4.2g 475g 320g 155g 6.4g
25 cm / 10 inch 360g 240g 120g 4.8g 540g 360g 180g 7.2g
28 cm / 11 inch 405g 270g 135g 5.4g (scant ¾ level tsp) 600g 400g 200g 8g
30 cm / 12 inch 450g 300g 150g 6g 675g 450g 225g 9g
36 cm / 14 inch 540g 360g 180g 7.2g 820g 550g 270g 11g

If you are using square tins the following tells you the equivalent round size tin to use and you can then refer to the table above for pastry quantities. To find the square tin equivalent of rectangular tins do the following:

  • Measure both sides of the rectangular tin
  • Multiply the two figures
  • Calculate the square root of the result and this will give you the square tin size, from which you can then find the round tin equivalent.

Example: The Alan Silverwood tranche tin measures 35.6cm by 12cm which when multiplied, comes to 439.2cm. The square root of 439.2 equals 20.95cm which means that it is roughly equivalent to a 20cm / 8 in square tin (or a 23cm / 9 in round tin)

ROUND SQUARE
13 cm / 5 inch 10 cm / 4 inch
15 cm / 6 inch 13 cm / 5 inch
18 cm / 7 inch 15 cm / 6 inch
20cm / 8 inch 18 cm / 7 inch
23 cm / 9 inch 20cm / 8 inch
25 cm / 10 inch 23 cm / 9 inch
28 cm / 11 inch 25 cm / 10 inch
30 cm / 12 inch 28 cm / 11 inch
36 cm / 14 inch 30 cm / 12 inch

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