オンライン定規

Use the free online オンライン定規 tool. Fast, private and easy to use — runs entirely in your browser. Part of our ランダム・測定ツール collection.

決定ホイール

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Let the wheel pick for you when you cannot decide between options.

Number of teams

Split a list of names into fair, random teams in one click.

Randomly order a list of names — perfect for raffles and turn order.

Home

Visitor

Track scores for sports, games and quizzes with two counters.

A simple tally counter for counting people, reps, votes or mouse clicks.

Convert numbers to Roman numerals and back, from 1 to 3999.

Spell out numbers in words, or turn written numbers back into digits.

An on-screen ruler in centimetres. Note: accuracy depends on your screen DPI.

A printable on-screen protractor showing degrees from 0 to 180.

Is the オンライン定規 free to use?

Yes. The オンライン定規 is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the オンライン定規 safe and private?

Absolutely. The オンライン定規 runs entirely in your browser, so your data never leaves your device and nothing is uploaded to a server.

Do I need to install anything to use the オンライン定規?

No installation is needed. The オンライン定規 works instantly online in any modern browser on desktop, tablet or mobile.

Does the オンライン定規 work on mobile phones?

Yes. The オンライン定規 is fully responsive and works smoothly on iPhone, Android and any other device.