Calculateur de Format d'Image

Entrez la diagonale, la largeur ou la hauteur pour calculer immédiatement toutes les dimensions physiques.

1. Select Aspect Ratio

Decimal:1.78:1
Custom Ratio:
:

2. Enter Any Dimension

Diagonal, Width, or Height

Popular sizes:

Interactive Diagonal Slider27.0"
5" (Phone)27" (Desk)55" (Living Room)100"+ (Cinema)
Optional: Calculate Pixel Density (PPI) & Megapixels▼

Calculated Dimensions

Diagonal27.00″
68.58 cm
Width23.53″
59.77 cm
Height13.24″
33.62 cm
Screen Area311.5 sq in
2,009.6 cm²
Aspect Ratio Decimal1.778 : 1 (16:9)
Viewing Distance (SMPTE / THX)3.7 ft / 2.8 ft
Pixel Density & MegapixelsEnter resolution above

Interactive Visualizer

27.0″ (68.6 cm)W: 23.5″ (59.8 cm)H: 13.2″ (33.6 cm)
Letterbox / Pillarbox Simulator

Simulate black bars when watching different video ratios on this display:

Standard Displays Quick Guide

16:9 Standard
DiagonalWidth (in / cm)Height (in / cm)Area
24″20.9″ (53.1 cm)11.8″ (29.9 cm)246 sq in
27″23.5″ (59.8 cm)13.2″ (33.6 cm)312 sq in
32″27.9″ (70.8 cm)15.7″ (39.8 cm)438 sq in
55″47.9″ (121.8 cm)27.0″ (68.5 cm)1,293 sq in
65″56.7″ (143.9 cm)31.9″ (80.9 cm)1,805 sq in
100″87.2″ (221.4 cm)49.0″ (124.5 cm)4,272 sq in
Mathematical Formulas & Step-by-Step Derivation▼

Screen dimensions are calculated using the Pythagorean Theorem (W² + H² = D²) combined with the ratio proportion W / H = Rw / Rh:

1. Screen Width from Diagonal (d) and Ratio (w:h):

Width = d × w ÷ √(w² + h²)

2. Screen Height from Diagonal (d) and Ratio (w:h):

Height = d × h ÷ √(w² + h²)

3. Screen Area:

Area = Width × Height

4. Pixel Density (PPI):

PPI = √(Horiz_px² + Vert_px²) ÷ Diagonal_in

Optimal Viewing Distance: SMPTE recommends a 30-degree field of view for mixed multimedia (Distance ≈ Diagonal × 1.62), while THX recommends a 40-degree field of view for cinematic immersion (Distance ≈ Diagonal × 1.2).

FAQ

Comment calculer le format d'image d'un écran ?

Divisez la résolution horizontale par la verticale et réduisez les deux nombres par leur PGCD. Par exemple, 1920×1080 donne 16:9.

Mon écran est-il en 16:9 ou 16:10 ?

Vérifiez la résolution dans vos paramètres. Un ratio d'environ 1,78 indique le 16:9 ; exactement 1,6 indique le 16:10.