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Printable ruler

A ruler that prints at the size it says, and a screen scale worked out from a bank card.

It runs entirely in this browser tab: nothing you type is uploaded, and nothing here counts down, rings or records.

Settings

How long: The room the meeting is booked for, which the agenda is checked against A number from 50 to 300.
Marks: All four are in ordinary use; a tool that read one of them would refuse three quarters of the templates people already have. Choices: {amount} mm, Millimetres and inches, {amount} in.
Card width in pixels: Hold a bank card against the screen and measure it in pixels. That is the only size this page can know.
Card held: 85.60 mm across, 53.98 upright. A reader who measures the short side and is told the long one has a ruler a third too small. Choices: The long way, 85.60 mm, The short way, 53.98 mm.
Draw a check bar: A hundred millimetres to hold a ruler against, which is the only way to find out whether the printer scaled the page.

Why is there no click counter or reaction timer?: Because both are a button and a clock, and this page is a function from one text to one result. A reaction timer that measured a browser's own scheduling delay would be reporting the wrong number confidently, which is worse than not shipping it. All eight of the group's device tools are named on the hub instead.
Does the break schedule remind me?: No. There is no clock, no notification and no code here that could make one. What it does is write the day out in advance — work, breaks and lunch in the middle of whatever day you gave — so you can print it or put it in a calendar that does ring.
Will the printed ruler be the right size?: It will if your printer does not scale the page, which is what the hundred-millimetre check bar is for: hold a ruler against it. The drawing is an SVG whose width is stated in millimetres, so the size is in the file rather than in the viewer.
Does the decision matrix tell me what to choose?: No, and it says so on every result. It multiplies your scores by your weights, which makes your own judgement visible; a matrix that came out the way you hoped is a matrix you weighted. What it adds is how close the top two were.

Printable protractor
A protractor drawn to the degree, with both scales so an angle is not read as its supplement.

Habit grid
A month of boxes to tick, or the streaks read back from a month you already ticked.

Shortcut sheet
Lays your shortcuts out in columns on real paper, and says which ones did not fit.