Sheet Metal Pattern: Trueflat

Trueflat turns the dimensions of a sheet metal part into its flat pattern. Pick a shape, enter the sizes in millimetres or in inches with fractions, and watch the 3D model unfold onto the sheet.

59 shapes in one catalogue: cones and frustums, transitions including square to round, tees and pipe intersections, segmented elbows, offsets, rectangular ducts, pyramids, sphere gores, flanges and industrial parts such as helix flights and dished heads.

Sheet thickness is part of the input. Say whether your dimensions are inside, middle or outside and the pattern is developed on the neutral line. Each shape tells you whether its pattern is exact or approximate, and by how much.

Take the pattern to the shop floor the way you work:
DXF export at 1:1 in millimetres for plasma, laser or waterjet cutting (Pro).
Tiled 1:1 PDF with a 100 mm check line, so you can confirm the print scale before you cut.
A hand layout guide using the ordinate method, for marking out with a square and a tape.
A material quote with sheet area, weight and price.

Save projects, share them, and switch between light, dark and a high-contrast field theme for bright sunlight. Calculation, flat pattern and export run on the device without internet; only buying or restoring Pro needs a store connection. No account and no ads. Available in 21 languages.

Every pattern is computed by two independent implementations and the results are compared against each other.

Free: all 59 shapes with the 3D model, the flat pattern and the results on screen, shown with sample dimensions. On 8 basic shapes, including the pipe tee, you can also enter your own dimensions, print the 1:1 PDF, use the layout guide and the quote, and save and share projects. Trueflat Pro adds your own dimensions and every output on all 59 shapes, plus DXF export: monthly, yearly with a 3-day free trial, or a one-time lifetime purchase.

Privacy: https://heyisoft.github.io/trueflat/privacy/
Terms: https://heyisoft.github.io/trueflat/terms/

Recent changes:
Preview every shape with sample dimensions before you buy. DXF export, and your own dimensions on advanced shapes, are part of Pro. Clearer messages when a purchase or restore can't complete.