Scale length calculator

This is a scale length converter that calculates the actual length and the scale length according to the scale ratio. scale ratio could be set by yourself, supports different length units, including imperial units and metric units. With visual graphic and formula, it let us more easily understand the calculation process and the result.

How to use this scale length converter

1. Set the scale ratio according your need, for example 1:6, 1:12, 1:18, 1:35, 1:50, 1:100
2. Select the unit of real length and scale length
3. Support multiple unit coversions, such as mm, cm, meter, km, inches, feet, yards, miles, nautical miles
4. Using different units will automatically convert the result.
5. Enter actual length, the scaled length will be calculated automatically.
6. Enter the scaled length, the actual length will be calculated automatically.

What is scale factor ?

A scale factor is the constant ratio between the corresponding lengths of two similar geometric figures. It is a multiplier used to determine how much a shape has been enlarged or reduced in size. It tells you how many times larger or smaller the 'New' length is compared to the 'Original' length. To find the scale factor, you divide the New Length by the Original Length.scale factor calculator

Formula: Scale Factor = $\frac{\text{New Length}}{\text{Original Length}}$

• Enlargement: If the scale factor is greater than 1, the figure becomes larger.
• Reduction: If the scale factor is between 0 and 1, the figure becomes smaller.
• Congruency: If the scale factor is exactly 1, the figure remains the same size.

How to calculate scale size

If we would like calculate the scaling length, use the real length multiply the scaling factor of it, then divide the scale factor of scale length, for example
Scale ratio 1:12
Real length : 240 inch
Scale length : 240 inch × 1 ÷ 12 = 20 inch

To calculate the real length, use scaling length multiply the scale factor of it, then divide by the scale factor of real length, for example
Scale ratio 1:200
Scale length : 5 cm
Real length : 5 cm × 200 ÷ 1 = 1000 cm

Our Facebook Pages

Try the scale calculator on your smartphone

Share to your good friends

Edit the text description on this page

We hope to provide a more user-friendly experience. We welcome your comments. The text of the webpage is automatically generated by Google Translate. It may not be correct. If you are willing to provide better text description, please click this button. ››› Please be polite and don't use it maliciously.