Camera Resolution Calculator
ANA›Life Services Authority›National Calculator Authority›Camera Resolution Calculator
.calc-container { max-width: 640px; margin: 2rem 0; padding: 1.5rem; background: #fff; border: 1px solid #ddd; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.06); font-family: system-ui, -apple-system, sans-serif; } .calc-container h3 { font-family: Georgia, serif; font-size: 1.15rem; color: #1a1a1a; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; flex-wrap: wrap; } .calc-row label { min-width: 160px; font-size: 0.9rem; color: #333; font-weight: 500; } .calc-row input[type="number"], .calc-row select { flex: 1; min-width: 120px; max-width: 200px; padding: 0.5rem 0.6rem; border: 1px solid #ccc; border-radius: 4px; font-size: 0.9rem; font-family: system-ui, sans-serif; color: #1a1a1a; background: #fafaf8; } .calc-row input:focus, .calc-row select:focus { outline: none; border-color: var(--ac, #3d5a80); box-shadow: 0 0 0 2px rgba(26,74,138,0.12); } .calc-row .unit { font-size: 0.82rem; color: #888; min-width: 30px; } .calc-btn { display: inline-block; margin-top: 0.5rem; padding: 0.55rem 1.5rem; background: var(--ac, #3d5a80); color: #fff; border: none; border-radius: 4px; font-size: 0.9rem; font-weight: 600; cursor: pointer; font-family: system-ui, sans-serif; } .calc-btn:hover { opacity: 0.9; } .calc-result { margin-top: 1.25rem; padding: 1rem 1.25rem; background: #f0f6fc; border-left: 3px solid var(--ac, #3d5a80); border-radius: 0 6px 6px 0; display: none; } .calc-result.visible { display: block; } .calc-result-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #666; margin-bottom: 0.25rem; } .calc-result-value { font-size: 1.6rem; font-weight: 700; color: var(--ac, #3d5a80); } .calc-result-detail { font-size: 0.85rem; color: #555; margin-top: 0.5rem; line-height: 1.5; } .calc-note { margin-top: 1rem; font-size: 0.8rem; color: #888; font-style: italic; } .calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 0.75rem; } .calc-grid-item { padding: 0.6rem 0.8rem; background: #f8f9fa; border-radius: 4px; border: 1px solid #eee; } .calc-grid-item .label { font-size: 0.75rem; color: #888; text-transform: uppercase; letter-spacing: 0.04em; } .calc-grid-item .value { font-size: 1.1rem; font-weight: 600; color: #1a1a1a; } @media (max-width: 720px) { .calc-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; } .calc-row label { min-width: auto; } .calc-row input[type="number"], .calc-row select { max-width: 100%; width: 100%; } .calc-grid { grid-template-columns: 1fr; } } .calc-chart { margin: 1rem 0; text-align: center; } .calc-chart svg { max-width: 100%; height: auto; } .calc-chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.6rem 1.2rem; margin-top: 0.6rem; font-size: 0.8rem; color: #555; } .calc-chart-legend span { display: inline-flex; align-items: center; gap: 0.3rem; } .calc-chart-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; font-style: normal; } .calc-related { max-width: 640px; margin: 2rem 0 1rem; padding: 1.25rem 1.5rem; background: #f8f9fa; border: 1px solid #e8e8e8; border-radius: 8px; } .calc-related h3 { font-family: Georgia, serif; font-size: 1rem; color: #1a1a1a; margin: 0 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 2px solid var(--ac, #3d5a80); } .calc-related-list { list-style: none; padding: 0; margin: 0 0 0.75rem; display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem 1.5rem; } .calc-related-list li a { font-size: 0.88rem; color: var(--ac, #3d5a80); text-decoration: none; } .calc-related-list li a:hover { text-decoration: underline; } .calc-browse-all { margin: 0.5rem 0 0; font-size: 0.9rem; font-weight: 600; } .calc-browse-all a { color: var(--ac, #3d5a80); text-decoration: none; } .calc-browse-all a:hover { text-decoration: underline; } @media (max-width: 720px) { .calc-related-list { grid-template-columns: 1fr; } }
Camera Resolution Calculator
Calculate megapixels, pixel size, angular resolution, and storage size from sensor dimensions and pixel count.
Sensor Width (pixels)
Sensor Height (pixels)
Sensor Width (mm)
Sensor Height (mm)
Focal Length (mm)
Bit Depth (bits per channel)
8-bit (JPEG) 12-bit (RAW) 14-bit (RAW) 16-bit (TIFF)
Color Channels
1 (Grayscale) 3 (RGB) 4 (RGBA/CMYK)
Calculate Enter sensor dimensions and pixel count above.
function camCalc() { var wp = parseFloat(document.getElementById('cam-width-px').value); var hp = parseFloat(document.getElementById('cam-height-px').value); var sw = parseFloat(document.getElementById('cam-sensor-w').value); var sh = parseFloat(document.getElementById('cam-sensor-h').value); var fl = parseFloat(document.getElementById('cam-focal').value); var bd = parseInt(document.getElementById('cam-bit-depth').value); var ch = parseInt(document.getElementById('cam-channels').value); var res = document.getElementById('cam-result');
// Validate required fields if (!wp || wp ⚠ Please enter valid pixel width and height (both must be positive integers).'; return; } if (wp ⚠ Pixel dimensions must be positive whole numbers.'; return; }
// Core calculations var totalPixels = wp * hp; var megapixels = totalPixels / 1e6; var aspectRatio = wp / hp;
// Simplify aspect ratio function gcd(a, b) { return b === 0 ? a : gcd(b, a % b); } var g = gcd(Math.round(wp), Math.round(hp)); var arW = Math.round(wp) / g; var arH = Math.round(hp) / g; // Normalize to common display ratios var arStr = arW + ':' + arH;
// Pixel size (if sensor dimensions provided) var pixelSizeW = NaN, pixelSizeH = NaN, pixelSizeAvg = NaN; var sensorDiag = NaN; var pixelDensity = NaN; if (sw > 0 && sh > 0) { pixelSizeW = (sw / wp) * 1000; // microns pixelSizeH = (sh / hp) * 1000; // microns pixelSizeAvg = (pixelSizeW + pixelSizeH) / 2; sensorDiag = Math.sqrt(sw * sw + sh * sh); // Pixels per mm² pixelDensity = totalPixels / (sw * sh); }
// Angular resolution (if focal length provided) var angResArcSec = NaN, angResMrad = NaN, fov_w = NaN, fov_h = NaN, fov_d = NaN; if (!isNaN(pixelSizeAvg) && fl > 0) { // Angular resolution per pixel in radians: pixel_size_mm / focal_length_mm var pixSizeMm = pixelSizeAvg / 1000; angResMrad = (pixSizeMm / fl) * 1000; // milliradians angResArcSec = (pixSizeMm / fl) * (180 / Math.PI) * 3600; // arcseconds // Field of view: 2 * atan(sensor_dim / (2 * focal_length)) fov_w = 2 * Math.atan(sw / (2 * fl)) * (180 / Math.PI); fov_h = 2 * Math.atan(sh / (2 * fl)) * (180 / Math.PI); fov_d = 2 * Math.atan(sensorDiag / (2 * fl)) * (180 / Math.PI); }
// File size calculation (uncompressed) var fileSizeBits = totalPixels * ch * bd; var fileSizeBytes = fileSizeBits / 8; var fileSizeMB = fileSizeBytes / (1024 * 1024); var fileSizeGB = fileSizeMB / 1024;
// Print resolution equivalents var dpi300_w = (wp / 300).toFixed(2); var dpi300_h = (hp / 300).toFixed(2); var dpi150_w = (wp / 150).toFixed(2); var dpi150_h = (hp / 150).toFixed(2);
// Build output var html = '### 📷 Camera Resolution Results '; html += '';
// Resolution & Megapixels html += 'Resolution & Megapixels'; html += 'Total Pixels' + totalPixels.toLocaleString() + ' px'; html += 'Megapixels' + megapixels.toFixed(2) + ' MP'; html += 'Aspect Ratio' + arStr + ' (' + aspectRatio.toFixed(4) + ')'; html += 'Image Dimensions' + Math.round(wp) + ' × ' + Math.round(hp) + ' px';
// Pixel Size (if available) if (!isNaN(pixelSizeAvg)) { html += 'Pixel & Sensor Properties'; html += 'Pixel Size (width)' + pixelSizeW.toFixed(3) + ' µm'; html += 'Pixel Size (height)' + pixelSizeH.toFixed(3) + ' µm'; html += 'Pixel Size (average)' + pixelSizeAvg.toFixed(3) + ' µm'; html += 'Sensor Diagonal' + sensorDiag.toFixed(2) + ' mm (' + (sensorDiag / 25.4).toFixed(3) + '")'; html += 'Pixel Density' + pixelDensity.toFixed(0) + ' px/mm²'; }
// Angular resolution & FOV (if available) if (!isNaN(angResArcSec)) { html += 'Angular Resolution & Field of View'; html += 'Angular Resolution' + angResArcSec.toFixed(2) + ' arcsec/px | ' + angResMrad.toFixed(4) + ' mrad/px'; html += 'Field of View (H × V)' + fov_w.toFixed(2) + '° × ' + fov_h.toFixed(2) + '°'; html += 'Field of View (Diagonal)' + fov_d.toFixed(2) + '°'; }
// File size html += 'Uncompressed File Size'; html += 'Bit Depth × Channels' + bd + ' bits × ' + ch + ' = ' + (bd * ch) + ' bits/px'; html += 'File Size' + fileSizeMB.toFixed(2) + ' MB (' + fileSizeGB.toFixed(3) + ' GB)';
// Print sizes html += 'Print Size Equivalents'; html += 'At 300 DPI (photo quality)' + dpi300_w + '" × ' + dpi300_h + '" (' + (dpi300_w * 2.54).toFixed(1) + ' × ' + (dpi300_h * 2.54).toFixed(1) + ' cm)'; html += 'At 150 DPI (large format)' + dpi150_w + '" × ' + dpi150_h + '" (' + (dpi150_w * 2.54).toFixed(1) + ' × ' + (dpi150_h * 2.54).toFixed(1) + ' cm)';
html += ''; res.innerHTML = html; }
#### Formulas Used
Megapixels: MP = (Widthpx × Heightpx) / 1,000,000
Pixel Size: pixel_size (µm) = (Sensor_dimension_mm / Pixel_count) × 1000
Angular Resolution: θ = pixel_size_mm / focal_length_mm → arcsec = θ × (180/π) × 3600
Field of View: FOV = 2 × arctan(sensor_dimension / (2 × focal_length))
Uncompressed File Size: Size (bytes) = Widthpx × Heightpx × channels × bit_depth / 8
Print Size: print_inches = pixel_count / DPI
Sensor Diagonal: d = √(width_mm² + height_mm²) (Pythagorean theorem)
#### Assumptions & References
- File size is calculated for uncompressed raw data; JPEG compression typically achieves 10:1 to 20:1 ratio, RAW ~3:1 to 5:1.
- Angular resolution assumes a perfect diffraction-free lens; real-world optics are limited by the Rayleigh criterion: θ = 1.22 λ/D.
- Field of view uses the rectilinear (non-fisheye) lens model: FOV = 2×arctan(d / 2f).
- Pixel density (px/mm²) assumes 100% fill factor with no gaps between pixels.
- Sensor diagonal follows the Pythagorean theorem on the physical sensor dimensions.
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