About this tool
Find a simplified width-to-height ratio and calculate a corresponding dimension from the values entered. Use it to plan an image or display size while keeping the intended orientation and pixel rounding visible.
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server.
मुख्य इनपुट और नियंत्रण हिंदी में देखने के लिए ऊपर “🇮🇳 हिंदी में देखें” चुनें। गणना और फ़ाइल प्रोसेसिंग इसी ब्राउज़र टैब में होती है; टूल आपके इनपुट हमारी होस्टिंग पर नहीं भेजता।
Features
- Work with Original Width (px); Original Height (px); New Target Width (px) (to find matching Height).
- Review Aspect Ratio; Decimal Ratio (W/H); Original Dimensions in the result breakdown.
Benefits
- Preserve a chosen ratio when planning dimensions.
- Compare landscape and portrait dimensions consistently.
Who should use this tool?
- Designers checking an image layout.
- People preparing display or photo dimensions.
How to use
- Complete the labelled fields for your scenario, including Original Width (px); Original Height (px); New Target Width (px) (to find matching Height). Use the units shown beside each field.
- Try the example labelled “Full HD 1920×1080 Scaled to 1280px Width (16:9 → 1280×720)” if you want to check the workflow first.
- Select Calculate / Run Tool and review Aspect Ratio & Scaled Dimensions and Aspect Ratio; Decimal Ratio (W/H).
- Check the assumptions and limitations below. Adjust a value to compare scenarios, then copy or download the result you need.
Try these worked examples
| Scenario | Example inputs | Example result |
|---|---|---|
| Full HD 1920×1080 Scaled to 1280px Width (16:9 → 1280×720) | Original Width (px): 1920Original Height (px): 1080New Target Width (px) (to find matching Height): 1280 | 16:9 Ratio → 1280 × 720 px |
| YouTube Shorts / Reels 1080×1920 Scaled to 720px Width (9:16 → 720×1280) | Original Width (px): 1080Original Height (px): 1920New Target Width (px) (to find matching Height): 720 | 9:16 Ratio → 720 × 1280 px |
Reference and processing
Euclidean Greatest Common Divisor (GCD) Ratio Reduction · Listed applicability: 2025-2026
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server.
FAQs
Why can the suggested size differ by a pixel?
Pixel dimensions are whole numbers. A proportional calculation can require rounding, so the exact fraction and the nearest usable pixel dimensions may differ slightly.
Which inputs do I need for Aspect Ratio & Screen/Image Dimension Calculator?
Use Original Width (px); Original Height (px); New Target Width (px) (to find matching Height). The built-in examples show how those fields fit together.
What should I check before using this result?
Rounds target dimensions to nearest whole pixel. Check the assumptions and output against your intended task before relying on the result.
What happens to the information I enter?
Calculations and file processing run in this browser tab. The tool does not send working inputs or files to our hosting server. Tool favourites save only tool IDs in this browser. Sharing sends the tool link, not your working values or files.