Règle en Ligne — Taille Réelle en CM, MM, Pouces et Pixels (Écran et Centre)

Règle en ligne gratuite grandeur réelle en cm, mm, pouces et pixels. Calibrez avec une carte bancaire, mesurez sur les 4 bords d’écran avec auto-détection.

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.