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Scale Converter

Convert measurements between different drawing scales for plans, blueprints, or models.

Quick Samples
Try these common configurations to get started

Plan to Full Size

A common conversion for lofting

Model Making

Scaling a real boat down to a model

Blueprint Check

Comparing scales on metric plans

Hull Dimensions
Enter your boat's principal dimensions

e.g., inches, mm

e.g., 48 for 1/4"=1'

e.g., 1 for full-size

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About This Tool
The Scale Converter is a fundamental tool for anyone working with scaled drawings like boat plans, blueprints, or models. It allows you to take a measurement from a drawing at one scale and accurately calculate what that measurement would be at a different scale. This is essential for lofting a boat to full size, creating a scale model from plans, or simply verifying dimensions on a drawing.

Key Concepts:

Scale: The ratio between the size of something on a drawing and its size in the real world.
Scale Factor: The number you multiply the original measurement by to get the new measurement.
Lofting: The process of drawing a boat's plans at full size, which relies heavily on scale conversion.
Architectural Scale: A scale based on fractions of an inch representing one foot (e.g., 1/4" = 1').
Frequently Asked Questions

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