Herramientas Regla de Pantalla de 4 Bordes

Regla Online — Tamaño Real en CM, MM, Pulgadas y Píxeles (Bordes y Centro)

Regla en línea a tamaño real gratis en cm, mm, pulgadas y píxeles. Calibra con tarjeta bancaria, mide con los 4 bordes o puntos centrales con detección automática.

Generic Estimated Scale (96 PPI)Generic fallback. Use card outline to lock true physical size.

METRIC (TOP/LEFT) · INCHES (BOTTOM/RIGHT)

Edges:

Snap:

2D Measurement (Width × Height) · estimated

W: 31.7 mm3.17 cm · 1.250 inH: 15.9 mm1.59 cm · 0.625 inDiag: 35.5 mm

📋 Session Measurement Log (0)

No saved measurements yet. Click [+ Log] above to record measurements during your session.

Place physical items against any active screen edge ruler, or drag points A and B to measure length and height. Select A or B to nudge with Arrow keys (1 mm / 1/16″) or Shift + Arrow keys for fine-tuning in 0.1 mm increments.

21.2 cm × 6.9 cm visible · Accuracy depends on calibration4-Edge Bezel Scales · Local measurements · No upload or account

Auto-Detect & Calibration

Screen resolution and DPR are auto-detected on load. Match any standard bank card to lock 100% true physical scale.

Measure Center or Screen Edges

Use Points A & B for millimeter/inch dimensions, or activate Bezel Mode to align physical objects directly against your monitor frame.

Ring Sizer & Coins

Switch to Ring Sizer mode to determine your exact US, UK, EU, or JP ring size with on-screen circles and standard coin references.