Square millimeter → Square decimeter converter (mm² to dm²) - Area Converter

Table Of Contents

Square millimeter to square decimeter Conversion
Formula
Examples
- Convert 100 square millimeter to square decimeter:
Conversion table

Square millimeter to square decimeter Conversion

1 square millimeter (mm²) is equal to 0.0001 square decimeter (dm²).

1 mm² = 0.0001 dm²

1 dm² = 10000 mm²

Formula

To convert a area from square millimeter (mm²) to square decimeter (dm²), divide the area in square millimeter by 10000

a_(dm²) = a_(mm²) / 10000

Examples:

Convert 100 square millimeter to square decimeter:

a_(dm²) = 100mm² / 10000 = 0.01 dm²

Conversion table

Square millimeter (mm²)	Square decimeter (dm²)
1 mm²	1.0e-4 dm²
2 mm²	2.0e-4 dm²
3 mm²	3.0e-4 dm²
5 mm²	5.0e-4 dm²
10 mm²	0.001 dm²
20 mm²	0.002 dm²
25 mm²	0.0025 dm²
50 mm²	0.005 dm²
100 mm²	0.01 dm²
250 mm²	0.025 dm²
500 mm²	0.05 dm²
1000 mm²	0.1 dm²

Square millimeter (mm²)

Square decimeter (dm²)

1 mm²

1.0e-4 dm²

2 mm²

2.0e-4 dm²

3 mm²

3.0e-4 dm²

5 mm²

5.0e-4 dm²

10 mm²

0.001 dm²

20 mm²

0.002 dm²

25 mm²

0.0025 dm²

50 mm²

0.005 dm²

100 mm²

0.01 dm²

250 mm²

0.025 dm²

500 mm²

0.05 dm²

1000 mm²

0.1 dm²

Square decimeter (dm²)	Square millimeter (mm²)
1 dm²	10000 mm²
2 dm²	20000 mm²
3 dm²	30000 mm²
5 dm²	50000 mm²
10 dm²	100000 mm²
20 dm²	200000 mm²
25 dm²	250000 mm²
50 dm²	500000 mm²
100 dm²	1000000 mm²
250 dm²	2500000 mm²
500 dm²	5000000 mm²
1000 dm²	10000000 mm²

Square decimeter (dm²)

Square millimeter (mm²)

1 dm²

10000 mm²

2 dm²

20000 mm²

3 dm²

30000 mm²

5 dm²

50000 mm²

10 dm²

100000 mm²

20 dm²

200000 mm²

25 dm²

250000 mm²

50 dm²

500000 mm²

100 dm²

1000000 mm²

250 dm²

2500000 mm²

500 dm²

5000000 mm²

1000 dm²

10000000 mm²

Frequently asked questions

How do I convert square millimeter to square decimeter?

Divide the value in square millimeter by 10000 to get the result in square decimeter. For example, 5 mm² ÷ 10000 = 5.0e-4 dm².

How many square decimeter are in 1 square millimeter?

1 square millimeter (mm²) is equal to 1.0e-4 square decimeter (dm²).

How do I convert square decimeter back to square millimeter?

Use the inverse operation: multiply the value in square decimeter by 10000 to get the result in square millimeter.

How accurate is the square millimeter to square decimeter conversion?

The converter multiplies by the conversion factor 10000 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.