Directory Metric or Imperial

Calculate Incremental Diminishing Lengths at Given Angle

Angle (Top)

Increment in
Enter Angle (Top) and select either Side Length, Center Length (height) or First Length (base width). Enter the Increment of each member (vertically in diagram)
If you don't know the top angle, but do know side lengths and first length (base width), enter measured side lengths, click Angle Slider to select and hit keyboard cursor keys to adjust angle and First Length (base width) to equal measured length.

Deck Boards at 45 degrees For Deck Boards at 45 ° enter 1 Board Width + 1 Gap as the Increment.


Individual Member Lengths Mark-out

Running gauge (from bottom up) Mark-out

Print and cut diagram to use as a template to mark cutting angle on boards and/or set bevel gauge.
Or set bevel gauge directly from screen (mobile)

DON'T BREATH THE DUST If you're cutting concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks

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All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.

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