# Order of magnitude (surface)

this is a composition of surfaces of different orders of magnitude to comparison purposes.

The unit of the surface in the SI-UNIT system, derived from the basic unit meter , is 1 square meter (1 m ²). Further one in the following used units:

(10,000 cm ² = 1 m ²)

## smaller surfaces than 1 mm ²

1 μm ² (square micrometers) correspond = to 1.000.000 Nm ² (square nanometer)

• 0.05 μm ² - surface of a flu virus
• 0.20 μm ² - visibility border optical microscope
• 500 μm ² - surface of a bacterium

1 mm ² (square millimeters) corresponds = 1.000.000 μm ² (square micrometers)

• 0.01 mm ² - smallest with the naked eye visible particles
• 0.15 mm ² - surface of a human Eizelle
• 0.196 mm ² - cross-section area of the mine of a pressure pencil (0.5 mm)
• (further examples searched)

## 1 mm ² up to 100 mm² (1 cm ²)

• 1 mm ² - small boxes on graphic paper
• 25 mm ² - small boxes on normalcross-hatched paper (5-mm-Raster)
• 33 mm ² - pupil of humans
• 49 mm ² - small boxes on largecross-hatched paper (7-mm-Raster)
• (far 43.18 cm] and an aspect ratio of 4:3 (
CRT monitor

## of 17 tariff [according to. 43.18 cm] and an aspect ratio of 5:4 (

TFT monitor
• with 1280 × 1024 pixels))
• 929.0304 cm ² = 1
• square foot (square foot)
• [
• work on] 1000 cm ² to 10,000 cm ² (1 m ²)
1090 cm ² - surface
of a hand ball 1250 cm ² - elbow paper (

## format A3

)
(19 mm × 33 m)
of 8361.2736 cm ² = 1 square yard
[
-
bath min clay/tone - playing field 25-80 m ² - typical dwelling of a city dwelling (of examples)
[
845 m ² - wing area
of the airbus A-380
4000 m ² - surface area
of the old persons opera in Frankfurt/Main 4046.8564224 m ² = 1

## acre

2.00 hectars - inner court Pentagon

## 2.68 of the hectar - Passagierdecks of the RMS Queen Mary II

4.32 hectars - surface
90 hectars -
Helgoland, Hauptinsel

## [work on]

1 km ² to 10 km ²
1,579 km ² -
London, united Kingdom of 1,860 km ² -

## of Mauritius

4,400 km ² -
large salt lake, the USA 4,925 km ² -

## Grand Canyon national park

8,983 km ² -
Yellowstone national park 9,251 km ² -

## Cyprus

18,413 km ² - Saxonia

## 20,273 km ² -

Slovenia
Costa Rica 57,994 km ² -