Measure, Calculate & Print Anything

The online ruler calibrates to your exact screen using a credit card (85.6 mm) or your screen diagonal. Once calibrated, it measures in centimeters, millimeters, and inches with sub-millimeter accuracy — and you can download a printable ruler PDF at true scale for classroom or workshop use.

The protractor lets you drag three points on any background image and reads the angle live in degrees or radians — no physical protractor needed. The pixel ruler measures element sizes directly on screenshots or mockups, ideal for UI designers verifying spacing without leaving the browser.

For conversions: the unit converter handles everything from nanometers to miles in one place, while the aspect ratio calculator finds the ratio for any width × height or calculates a missing dimension. And the percentage calculator handles any percentage problem — what is X% of Y, percentage change, reverse percentages — instantly.

The graph paper generator creates sharp vector-based sheets you can customize and print immediately. Five styles cover every use case:

• Square grid — math homework, charts, floor plans, pixel art
• Dot grid — bullet journaling, sketching, planning layouts
• Isometric — 3D drawings, architecture concepts, game design
• Polar — trigonometry, circular engineering plots
• Hexagonal — chemistry, biology, quilting, tabletop RPG maps

Set any spacing from 1 mm to 50 mm, pick any line color, add numbered axis labels or a watermark, and export to PDF or SVG at any page size from A5 to custom poster.

The lined paper generator produces traditional notebook-style paper in any ruling — college ruled (7.1 mm), wide ruled (8.7 mm), narrow, or primary for young learners. Toggle a red margin line, add a header for name and date, and enable hole-punch guides.

The Cornell notes template is the proven layout for active-recall studying — customize the cue column width, summary section height, and ruling, then print as many sheets as you need. For younger students, the handwriting practice paper offers primary ruled (with dotted midline), four-line, and thirds styles from 6 mm to 40 mm height.

Need to track appointments? The printable calendar generator creates a clean monthly calendar you can print and write on — choose your start day, page size, and style, then export as PDF.

The percentage calculator covers four common calculations: what is X% of a number, what percentage is X of Y, percentage change between two values, and reverse percentage. No formula memorization — just type and get the answer with a clear explanation.

Writers and students use the word counter to see live statistics as they type — words, characters, sentences, paragraphs, and estimated reading time at 200 and 250 words per minute. Paste any text and the numbers update instantly.

The random number generator produces cryptographically strong random numbers in any range. Supports multiple results, unique-only mode, and dice rolls — d4 through d100 — for gaming and classroom use.

The blank staff paper tool generates customizable music manuscript paper for composers, students, and teachers. Set staves per page (4–20), adjust line spacing, add a clef gutter, and export for printing or digital annotation. Supports standard, grand staff (piano), and large-staff styles.

Guitarists can use the guitar TAB generator to make printable tablature with adjustable string counts (4–12 strings) and systems per page. Works for bass, standard 6-string, 7-string, and ukulele. Both music tools export to high-resolution PDF or SVG.