📏 Paper Trimmer Cut List Calculator

Enter your paper sheet size and the size of the pieces you want to cut to see how many full pieces fit per sheet (grid cutting, no rotation).

Sheet width (in)

Sheet height (in)

Piece width (in)

Piece height (in)

Two divisions, both rounded down

per row    = floor(sheet width / piece width)
per column = floor(sheet height / piece height)
total      = per row x per column

A 12 x 12 sheet cut into 4 x 4 squares gives 3 across and 3 down: 9 pieces, nothing left over. Rounding down keeps the count honest - 12 / 5 is 2.4, and the 0.4 is a 2 in offcut, not a usable piece.

The assumptions behind the count

One orientation only. Ask for 5 x 7 pieces from a 12 x 12 sheet and the answer is 2, because only one row of 7 in fits - yet turning a third piece sideways in the leftover 12 x 5 band gets you 3.
The sheet is exactly the size you typed. Cardstock often runs a fraction over or under 12 in and is rarely square. Square one edge first and enter the size you have after that cut.
Cuts take no width here. A trimmer blade removes almost nothing, unlike a saw, but the line still has thickness - leave a sixteenth of slack rather than planning to zero waste.

Enter the finished piece size. If the piece is printed and needs bleed, add 1/8 in on every edge first - and watch the yield fall: 4 x 4 squares cut at 4.25 x 4.25 drop from 9 per sheet to 4, since 12 / 4.25 rounds down to 2 each way.

Frequently asked questions

How many 4 x 4 squares fit on a 12 x 12 sheet?

Nine, in a 3 by 3 grid. Sixteen 3 x 3 squares also come out even, and 2 x 2 gives 36 - any size that divides 12 exactly wastes nothing.

How many photo mats can I cut from one sheet of cardstock?

Two, if you mat 4 x 6 prints with a quarter inch showing all round: the mat is 4.5 x 6.5, and a 12 in sheet takes 2 across and 1 down. Cut to the mat size, not the print size.

Why does the calculator give fewer pieces than I managed by hand?

It cuts a plain grid in one orientation. Mixing orientations, or taking a second set from the offcut band, beats a grid whenever the piece divides one edge much better than the other.