In 1 square inches there are 0.000645 square meter. Meanwhile in 1 square meter there are 1,550.0031 square inches. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Square meter to Square inches calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert square inches (in²) to square meters (m²), use this fixed area conversion factor:
Formula:
Quick example:
This square inches to square meters conversion works for any area, from small parts to room sizes. Keep your units clear: in² is area in inches, and m² is area in meters.
There are 0.00064516 square meters in 1 square inch.
This comes from the exact length rule: 1 inch = 0.0254 meters, then square it for area.
There are 1,550.0031 square inches in 1 square meter.
It’s the reverse of the conversion from square inches to square meters.
Use this formula:
square meters = square inches × 0.00064516
This works for any area value, small or large.
Use this formula:
square inches = square meters × 1,550.0031
This is helpful when you start with metric plans and need inches.
Square inches and square meters measure area, not length.
A length conversion changes one side. Area has two sides, so you square the length factor.
The exact factor is:
1 in² = (0.0254 m)² = 0.00064516 m²
Because 0.0254 meters per inch is exact, this area factor is exact too.
Multiply the number of square inches by 0.00064516.
Example:
500 in² × 0.00064516 = 0.32258 m²
Keep a few decimals if you need a precise result.
Here are quick reference values:
Multiply the length in inches by the width in inches to get square inches.
Then convert to square meters.
Example:
A 20 in by 30 in panel is 600 in².
600 × 0.00064516 = 0.387096 m²
Find the area in square inches first, then convert.
Circle area: A = π × r² (with radius in inches)
Then: m² = in² × 0.00064516
Example (r = 5 in):
Area = π × 25 = 78.5398 in²
Convert: 78.5398 × 0.00064516 ≈ 0.0507 m²
It depends on the job:
A good habit is to round at the end.
Yes. A square meter is much larger.
So a small number in m² can be a large number in in².
Square inches often show up in U.S. products and small parts, like screens, labels, and tool plates.
Square meters are common in building plans, flooring, paint coverage, and other metric-based specs.
No. It’s a unit conversion based on defined lengths, not on material.
Temperature can change the size of real objects, but it doesn’t change the unit values.
The Calculate Box tool to convert square inches to square meter uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a square inches value in the box and have it instantly converted to square meter.