Blueprint Measurer

Free online blueprint measurement tool. Upload architectural drawings, calibrate with a known dimension, and measure any distance on floor plans, elevations, and blueprints.

Upload a blueprint or architectural drawing, calibrate using a known dimension, and measure any distance on the plan with precision.

Drop blueprint image here

or click to browse (PNG, JPG, WEBP, BMP, TIFF)

Ctrl+V You can also paste from clipboard

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What is Blueprint Measurer?

Blueprint Measurer is a precision tool for measuring distances on architectural drawings, floor plans, elevations, and engineering blueprints. Upload any drawing image, calibrate using a known dimension line, and then measure any distance on the plan — even those not labeled in the original drawing.

How It Works

Upload your blueprint or drawing image (PNG, JPG, or other image formats)
Enter Calibrate mode: click two points on a dimension line with a known distance
Enter the real-world distance and unit (e.g., 3700 mm)
Switch to Measure mode: click any two points to measure the distance between them
All measurements are displayed on the canvas and listed in the sidebar

Tips for Accurate Measurements

Use the longest known dimension for calibration to minimize error
Zoom in for more precise point placement
Hold Shift while clicking to snap to horizontal or vertical lines
Use the scroll wheel to zoom and middle-click to pan around the drawing
Export your measurements as CSV for documentation

Common Use Cases

Measuring room dimensions from floor plans
Checking distances between structural elements
Verifying door and window sizes on architectural drawings
Estimating material quantities from construction plans
Measuring setbacks and clearances on site plans