Regla en Línea

Use the free online Regla en Línea tool. Fast, private and easy to use — runs entirely in your browser. Part of our Herramientas Aleatorias y de Medición collection.

Rueda de Decisión

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

Generador de Equipos

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

Sortear

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

Marcador

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

Contador

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

Conversor de Números Romanos

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

Number ↔ Words

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

Online Ruler (cm / inch)

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

Transportador

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

Preguntas Frecuentes

Is the Regla en Línea free to use?
Yes. The Regla en Línea is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.
Is the Regla en Línea safe and private?
Absolutely. The Regla en Línea 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 Regla en Línea?
No installation is needed. The Regla en Línea works instantly online in any modern browser on desktop, tablet or mobile.
Does the Regla en Línea work on mobile phones?
Yes. The Regla en Línea is fully responsive and works smoothly on iPhone, Android and any other device.