Understanding gauss to teslas Conversion
The gauss (G) is the CGS unit of magnetic flux density, common on magnet specifications and in geomagnetic data. The tesla (T) is the SI unit, defined as one weber per square metre, and describes strong fields such as those in MRI scanners (1.5-3 T) and research magnets. Converting gauss to teslas is the standard bridge from CGS magnet ratings to the SI values used in physics and medical imaging.
Conversion Formula
To convert gauss to teslas, multiply by this factor:
Step-by-Step Example
Convert 25 gauss to teslas.
How to Convert gauss to teslas
Move from the CGS gauss to the SI tesla with a single division by ten thousand.
- Take the gauss reading: Note the flux density in gauss.
- Multiply by 0.0001: Equivalently, divide by 10000, since 10000 gauss make one tesla.
- Express in teslas: The result is the field in the SI unit T.
- Worked result: 25 gauss × 0.0001 = 0.0025 teslas.
gauss to teslas conversion table
| gauss (G) | teslas (T) |
|---|---|
| 0 | 0 |
| 1 | 0.0001 |
| 2 | 0.0002 |
| 3 | 0.0003 |
| 4 | 0.0004 |
| 5 | 0.0005 |
| 6 | 0.0006 |
| 7 | 0.0007 |
| 8 | 0.0008 |
| 9 | 0.0009 |
| 10 | 0.001 |
| 15 | 0.0015 |
| 20 | 0.002 |
| 25 | 0.0025 |
| 30 | 0.003 |
| 40 | 0.004 |
| 50 | 0.005 |
| 60 | 0.006 |
| 70 | 0.007 |
| 80 | 0.008 |
| 90 | 0.009 |
| 100 | 0.01 |
| 150 | 0.015 |
| 200 | 0.02 |
| 250 | 0.025 |
| 300 | 0.03 |
| 400 | 0.04 |
| 500 | 0.05 |
| 600 | 0.06 |
| 700 | 0.07 |
| 800 | 0.08 |
| 900 | 0.09 |
| 1000 | 0.1 |
| 2000 | 0.2 |
| 3000 | 0.3 |
| 4000 | 0.4 |
| 5000 | 0.5 |
| 10000 | 1 |
| 25000 | 2.5 |
| 50000 | 5 |
| 100000 | 10 |
| 250000 | 25 |
| 500000 | 50 |
| 1000000 | 100 |
What is the Gauss?
The gauss is the CGS (centimetre-gram-second) unit of magnetic flux density, still widely used in physics, geomagnetism, and the magnet industry. It measures the strength of a magnetic B-field and is named after the mathematician and physicist Carl Friedrich Gauss.
Definition
One gauss equals one maxwell per square centimetre, and is defined in SI terms as exactly one ten-thousandth of a tesla.
Equivalently, , and . The gauss corresponds to a magnetic flux of one maxwell threading a one-square-centimetre area perpendicular to the field.
Origin and History
The unit honors Carl Friedrich Gauss (1777–1855), who with Wilhelm Weber pioneered absolute measurements of the geomagnetic field. The name "gauss" was assigned to this CGS-EMU unit of magnetic induction by the International Electrotechnical Commission around 1930, formalizing usage that had grown throughout 19th-century electromagnetism.
Law and Notable Facts
The gauss is not an SI unit; the SI equivalent is the tesla. However, it remains entrenched in practice, and manufacturers routinely rate permanent magnets in gauss or kilogauss. The residual field strength of magnetic materials (remanence) for strong neodymium magnets is around 12,000–14,000 gauss (1.2–1.4 T).
Real-World Examples and Conversions
- Earth's surface magnetic field is about 0.25–0.65 gauss (25–65 microtesla).
- A typical refrigerator magnet is roughly 50–100 gauss at its surface.
- A 1.5 T MRI scanner corresponds to 15,000 gauss.
- 1 gauss = 0.0001 T = 0.1 mT = 100 microtesla.
What is the Tesla?
The tesla is the SI derived unit of magnetic flux density (also called magnetic B-field or magnetic induction). It quantifies the strength of a magnetic field and is used throughout physics, electrical engineering, and medical imaging.
Definition
One tesla is the magnetic flux density of a uniform field that produces a flux of one weber through an area of one square metre perpendicular to the field.
In SI base units, . Equivalently, one tesla is the field in which a charge of one coulomb moving at one metre per second perpendicular to the field feels a force of one newton: .
Origin and History
The unit is named after Nikola Tesla (1856–1943), the inventor and electrical engineer whose work on alternating current and induction motors shaped modern power systems. The name was adopted by the General Conference on Weights and Measures (CGPM) in 1960, when the tesla was formally added to the SI.
Law and Notable Facts
The tesla is a large unit; most everyday magnetic fields are far weaker. Its non-SI counterpart, the gauss, equals exactly tesla and is still common in some fields. The strongest continuous magnetic fields produced in laboratories reach around 45 T, while pulsed magnets briefly exceed 1000 T.
Real-World Examples and Conversions
- Earth's surface magnetic field is roughly 25–65 microteslas (0.25–0.65 gauss).
- A typical clinical MRI scanner operates at 1.5 T or 3 T.
- A strong neodymium refrigerator-type magnet produces around 0.1–1 T at its surface.
- 1 T = 10,000 gauss = 1000 millitesla = 1,000,000 microtesla.
Frequently Asked Questions
How many teslas are in one gauss?
One gauss equals 0.0001 tesla (10⁻⁴ T), the exact ratio between the CGS and SI units of flux density.
How do I convert teslas back to gauss?
Multiply the tesla value by 10000. So a 1.5 T MRI field equals 15000 gauss.
What is 25 gauss in teslas?
25 gauss × 0.0001 = 0.0025 teslas.
Why is the tesla so much bigger than the gauss?
The tesla is the SI unit and represents a very strong field; even Earth's field is only about 0.00005 T, which is why everyday magnetism is usually quoted in gauss or millitesla.
How many gauss is a typical MRI magnet?
A 3 T MRI produces 30000 gauss, illustrating how quickly gauss values grow for the strong fields measured in teslas.
People also convert
Complete gauss conversion table
| Unit | Result |
|---|---|
| teslas (T) | 0.0001 T |
| milliteslas (mT) | 0.1 mT |
| microteslas (uT) | 100 uT |
| milligauss (mG) | 1000 mG |