Square Millimeters to Barns (mm² → b)
Formula
1 mm² = 1e+22 bConversion Table
| mm² | b |
|---|---|
| 0 | 0 |
| 1.0000 | 10,000,000,000,000,000,000,000 |
| 2.0000 | 20,000,000,000,000,000,000,000 |
| 3.0000 | 30,000,000,000,000,000,000,000 |
| 4.0000 | 40,000,000,000,000,000,000,000 |
| 5.0000 | 50,000,000,000,000,000,000,000 |
| 6.0000 | 60,000,000,000,000,000,000,000 |
| 7.0000 | 70,000,000,000,000,000,000,000 |
| 8.0000 | 80,000,000,000,000,000,000,000 |
| 9.0000 | 90,000,000,000,000,000,000,000 |
| 10.000 | 100,000,000,000,000,000,000,000 |
| 11.000 | 110,000,000,000,000,000,000,000 |
| 12.000 | 120,000,000,000,000,000,000,000 |
| 13.000 | 130,000,000,000,000,000,000,000 |
| 14.000 | 140,000,000,000,000,000,000,000 |
| 15.000 | 150,000,000,000,000,000,000,000 |
| 16.000 | 160,000,000,000,000,000,000,000 |
| 17.000 | 170,000,000,000,000,000,000,000 |
| 18.000 | 180,000,000,000,000,000,000,000 |
| 19.000 | 190,000,000,000,000,000,000,000 |
| mm² | b |
|---|---|
| 20.000 | 200,000,000,000,000,000,000,000 |
| 21.000 | 210,000,000,000,000,000,000,000 |
| 22.000 | 220,000,000,000,000,000,000,000 |
| 23.000 | 230,000,000,000,000,000,000,000 |
| 24.000 | 240,000,000,000,000,000,000,000 |
| 25.000 | 250,000,000,000,000,000,000,000 |
| 26.000 | 260,000,000,000,000,000,000,000 |
| 27.000 | 270,000,000,000,000,000,000,000 |
| 28.000 | 280,000,000,000,000,000,000,000 |
| 29.000 | 290,000,000,000,000,000,000,000 |
| 30.000 | 300,000,000,000,000,000,000,000 |
| 31.000 | 310,000,000,000,000,000,000,000 |
| 32.000 | 320,000,000,000,000,000,000,000 |
| 33.000 | 330,000,000,000,000,000,000,000 |
| 34.000 | 340,000,000,000,000,000,000,000 |
| 35.000 | 350,000,000,000,000,000,000,000 |
| 36.000 | 360,000,000,000,000,000,000,000 |
| 37.000 | 370,000,000,000,000,000,000,000 |
| 38.000 | 380,000,000,000,000,000,000,000 |
| 39.000 | 390,000,000,000,000,000,000,000 |
| mm² | b |
|---|---|
| 40.000 | 400,000,000,000,000,000,000,000 |
| 41.000 | 410,000,000,000,000,000,000,000 |
| 42.000 | 420,000,000,000,000,000,000,000 |
| 43.000 | 430,000,000,000,000,000,000,000 |
| 44.000 | 440,000,000,000,000,000,000,000 |
| 45.000 | 450,000,000,000,000,000,000,000 |
| 46.000 | 460,000,000,000,000,000,000,000 |
| 47.000 | 470,000,000,000,000,000,000,000 |
| 48.000 | 480,000,000,000,000,000,000,000 |
| 49.000 | 490,000,000,000,000,000,000,000 |
| 50.000 | 500,000,000,000,000,000,000,000 |
| 51.000 | 510,000,000,000,000,000,000,000 |
| 52.000 | 520,000,000,000,000,000,000,000 |
| 53.000 | 530,000,000,000,000,000,000,000 |
| 54.000 | 540,000,000,000,000,000,000,000 |
| 55.000 | 550,000,000,000,000,000,000,000 |
| 56.000 | 560,000,000,000,000,000,000,000 |
| 57.000 | 570,000,000,000,000,000,000,000 |
| 58.000 | 580,000,000,000,000,000,000,000 |
| 59.000 | 590,000,000,000,000,000,000,000 |
| mm² | b |
|---|---|
| 60.000 | 600,000,000,000,000,000,000,000 |
| 61.000 | 610,000,000,000,000,000,000,000 |
| 62.000 | 620,000,000,000,000,000,000,000 |
| 63.000 | 630,000,000,000,000,000,000,000 |
| 64.000 | 640,000,000,000,000,000,000,000 |
| 65.000 | 650,000,000,000,000,000,000,000 |
| 66.000 | 660,000,000,000,000,000,000,000 |
| 67.000 | 670,000,000,000,000,000,000,000 |
| 68.000 | 680,000,000,000,000,000,000,000 |
| 69.000 | 690,000,000,000,000,000,000,000 |
| 70.000 | 700,000,000,000,000,000,000,000 |
| 71.000 | 710,000,000,000,000,000,000,000 |
| 72.000 | 720,000,000,000,000,000,000,000 |
| 73.000 | 730,000,000,000,000,000,000,000 |
| 74.000 | 740,000,000,000,000,000,000,000 |
| 75.000 | 750,000,000,000,000,000,000,000 |
| 76.000 | 760,000,000,000,000,000,000,000 |
| 77.000 | 770,000,000,000,000,000,000,000 |
| 78.000 | 780,000,000,000,000,000,000,000 |
| 79.000 | 790,000,000,000,000,000,000,000 |
Square Millimeters to Barns Conversion
Converting Square Millimeters (mm²) to Barns (b) is a common area conversion. 1 mm² equals 10,000,000,000,000,000,000,000 b. For example, 100 mm² is equal to 1,000,000,000,000,000,000,000,000 b.
Quick Mental Math: Square Millimeters to Barns
1 square millimeter is 10^22 barns, so 5 square millimeters is 5 x 10^22 barns.
Why is converting Square Millimeters to Barns tricky?
square millimeters to barns swings by powers of 10^28, so a missing exponent changes the answer completely.
Quick Reference Values
1 mm² = 10,000,000,000,000,000,000,000 b. 5 mm² = 50,000,000,000,000,000,000,000 b. 10 mm² = 100,000,000,000,000,000,000,000 b. 25 mm² = 250,000,000,000,000,000,000,000 b. 50 mm² = 500,000,000,000,000,000,000,000 b. 100 mm² = 1,000,000,000,000,000,000,000,000 b.
What is Square Millimeters?
Square Millimeters (mm²) is a unit of area. A square millimeter equals the area of a square with sides one millimeter in length, or one millionth of a square meter (1 mm² = 10⁻⁶ m²). This SI unit is standard for measuring small surface areas in engineering, manufacturing, and biology [bipm-si-brochure]. The millimeter was defined in the late 18th century during the French Revolution, with the square millimeter following as its area counterpart. It was internationally adopted with the establishment of the SI system to unify measurement units [bipm-si-brochure]. Square millimeters are used globally in technical drawings, medical imaging, and material testing. Standards organizations like ISO and NIST reference mm² for precise area measurements in multiple industries [iso-80000].
What is Barns?
Barns (b) is a unit of area. The barn is a unit of area used primarily in nuclear physics to quantify cross-sectional areas of nuclei and particles. It equals 10^-28 square meters (m²) exactly. This unit facilitates expressing probabilities of nuclear reactions at atomic scales [nist-cuu]. The term 'barn' was coined during World War II by American physicists to represent a conveniently sized cross-sectional area for nuclear experiments. It was adopted informally in the 1940s and later recognized in physics literature [nist-cuu]. Barns are used internationally in nuclear physics, particle physics, and related fields. Organizations like the International Atomic Energy Agency (IAEA) and research institutions employ barns for reaction probability measurements [nist-cuu].
Common Misspellings
People often search for this conversion using these alternate spellings: square milimeters, sq millimeters, square millimetres, square milimeters, barn, barrn, barns unit. All of these refer to the Square Millimeters to Barns conversion.