Image Area Calculator
Measure area from images with precision
Perfect for scientific research, biology, microscopy, and education
How to Use
Upload Your Image
Upload a microscope image, photograph, or any image you want to measure. Supports JPG, PNG, and most common formats.
Set Scale Bar
If your image has a scale bar or known distance, mark it to calibrate measurements. Enter the real-world length (e.g., 100 μm, 1 cm).
Select Regions to Measure
Choose from rectangle, circle, or polygon tools to outline the area you want to measure. Support for multiple regions.
Get Results & Export
View area in pixels² and physical units (cm², mm², μm²). Calculate percentages, compare regions, and export results as CSV.
Perfect For
🔬 Scientific Research
- • Cell and tissue area measurement
- • Microscopy image analysis
- • Colony counting and sizing
- • Histology quantification
🎓 Education
- • Biology lab experiments
- • Student research projects
- • Teaching demonstrations
- • Academic publications
🏗️ Architecture & Engineering
- • Floor plan area calculation
- • Land measurement from maps
- • Construction site analysis
- • Property assessment
🎨 Design & Creative
- • Element area percentage
- • Layout composition analysis
- • Visual weight calculation
- • Design optimization
Frequently Asked Questions
How accurate is the area measurement?
Accuracy depends on your scale bar calibration and image quality. With proper calibration, measurements are highly accurate. For microscopy images, ensure the scale bar is clearly visible and correctly marked.
What units can I use for measurement?
You can measure in pixels² (without calibration) or any physical unit after setting a scale bar: micrometers (μm), millimeters (mm), centimeters (cm), meters (m), inches, or feet.
Can I measure multiple regions in one image?
Yes! You can measure multiple regions and get individual areas, total area, and percentage calculations for each region.
Is this tool free? Do I need to install software?
Completely free and runs in your browser. No installation, no registration, no limits. Your images are processed locally and never uploaded to our servers.
How is this different from ImageJ?
ImageJ is powerful but requires installation and has a steep learning curve. Our tool provides essential area measurement features in an easy-to-use, browser-based interface. Perfect for quick measurements and educational use.
Can I export the measurement results?
Yes, you can export results as CSV (Excel-compatible) with all measurements, including pixel areas, physical units, and percentages.
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