How do I line a tart tin without it shrinking?

Rest your pastry in the fridge for at least 30 minutes after making it and again for 20 minutes after lining the tin. When lining, gently press the pastry into the corners without stretching it — lift and ease it in rather than pulling. Leave a slight overhang and trim after blind baking. Always blind bake with baking beans or rice to hold the sides in place.

Should I use a loose-bottomed tin for tarts?

Loose-bottomed tart tins are ideal because they allow you to remove the tart cleanly without damaging it. Fluted edges also add strength to the pastry walls. Choose a metal tin over ceramic for tarts — metal conducts heat better and gives a crispier base, which is especially important for wet fillings like custard or fruit.

What is the difference between shortcrust and sweet pastry?

Shortcrust pastry uses the classic 2:1 flour-to-fat ratio with water to bind. Sweet pastry (pate sucree) uses more butter, adds sugar and egg yolks instead of water, resulting in a biscuit-like, crumbly texture. Sweet pastry is better for fruit tarts and desserts, while shortcrust is more versatile for both sweet and savoury fillings.

How thick should tart pastry be rolled?

For most tarts, roll to 3mm thickness. This gives a pastry case that is sturdy enough to hold its filling but thin enough to bake crisp. For delicate tarts with light fillings (like a lemon tart), you can go to 2mm. For deeper tarts with heavy fillings, 4mm provides extra support. This calculator assumes 3mm when estimating pastry weight.

Do I need to blind bake my tart case?

Almost always, yes. Blind baking (baking the pastry case empty before adding the filling) prevents a soggy bottom. Line with baking paper and fill with ceramic baking beans or dried rice. Bake at 180 degrees C fan for 15 minutes, remove the beans, then bake for another 5-8 minutes until the base is dry and lightly golden. For fully pre-baked cases, brush with beaten egg and return to the oven for 2 minutes to seal.

BakeCalcs

Tart Tin Pastry Calculator

Calculate how much pastry you need to line a tart tin based on diameter and depth.

Tin Diameter / Width

Internal diameter (round) or side width (square) of the tin, measured across the base

Tin Depth

Internal wall height of the tin (UK tart tins are typically 2.5-3.5cm deep)

Tin ShapeShape affects baking time and servings

Pastry TypeSelect the pastry type for your calculation

How We Calculate This

This calculator computes the surface area of your tart tin (base plus sides) and adds 20% extra for overlap and trimming. The surface area is then converted to pastry weight using a factor of approximately 0.30g per cm² at a standard 3mm rolling thickness — that comes from rolled pie dough having a density of about 1.05g per cm³, so a 3mm (0.3cm) sheet weighs roughly 1.05 × 0.3 ≈ 0.30g for every square centimetre.

The total weight is broken down into flour, butter, and water (or egg and sugar) depending on the pastry type selected. For round tins, the formula uses pi x r² for the base and pi x diameter x depth for the sides. For square tins, it uses width² for the base and 4 x width x depth for the sides. As a sense-check, a 23cm round tin works out at roughly 240g of dough (about 137g flour and 69g butter), in line with published shortcrust charts.

Frequently Asked Questions

Related Calculators

Shortcrust Pastry Calculator

Calculate flour, fat, and water for shortcrust pastry based on tin size.

Puff Pastry Layers Calculator

Calculate the number of pastry layers from folds and turns.

Rough Puff Pastry Calculator

Calculate ingredient quantities for rough puff pastry based on total weight needed.

Choux Pastry Calculator

Calculate butter, water, flour, and egg quantities for choux pastry by yield.

Custard Ratio Calculator

Calculate egg, milk, and sugar quantities for custard based on volume and desired richness.

Last updated: February 2026

All calculations are based on standard ratios and conversions. Results may vary with specific ingredients, equipment, and conditions.