Gauss To Tesla Converter
Convert magnetic flux density between gauss and tesla, with millitesla, microtesla, scientific notation and reverse conversion shown together.
Convert Magnetic Field Strength
Converted Result
10,000 G converts to 1 T.
Quick Answer
One gauss equals 0.0001 tesla. One tesla equals 10,000 gauss. The relationship is exact for this practical conversion because gauss is a centimetre-gram-second unit of magnetic flux density and tesla is the SI unit. The converter keeps both names visible because old magnet catalogues, classroom experiments, geophysics notes and some sensor readouts still use gauss, while engineering drawings and SI-based specifications usually use tesla, millitesla or microtesla. If a value looks very large after conversion, check whether the source really meant gauss and not milligauss, because those two differ by a factor of 1,000.
Gauss To Tesla Conversion Table
| Gauss | Tesla | Millitesla | Common Reading |
|---|---|---|---|
| 0.5 G | 0.00005 T | 0.05 mT | Small field check. |
| 1 G | 0.0001 T | 0.1 mT | Base conversion row. |
| 10 G | 0.001 T | 1 mT | Small magnet value. |
| 100 G | 0.01 T | 10 mT | Laboratory magnet note. |
| 500 G | 0.05 T | 50 mT | Specification comparison. |
| 1,000 G | 0.1 T | 100 mT | Strong permanent magnet range. |
| 5,000 G | 0.5 T | 500 mT | High field warning value. |
| 10,000 G | 1 T | 1,000 mT | One tesla exactly. |
| 15,000 G | 1.5 T | 1,500 mT | Common MRI field label. |
| 30,000 G | 3 T | 3,000 mT | High MRI field label. |
Formula And Steps
Tesla = gauss x 0.0001
Gauss = tesla x 10,000
Millitesla = tesla x 1,000
Microtesla = tesla x 1,000,000
1. Pick The Unit Printed On The Source
Use gauss when the source says G. Use tesla when the source says T. Do not treat mT as T; that would move the result by a factor of 1,000.
2. Convert Through Tesla
Tesla is the clean middle unit. The converter calculates tesla first, then derives gauss, millitesla and microtesla from that value.
3. Round For The Job
Use more decimals for small fields. For large magnet labels, scientific notation may be easier to read than a long decimal string.
Where The Result Can Mislead
A magnetic field number is not the whole story. A sensor value may be measured at a fixed distance from a magnet, while a catalogue value may describe a surface field or a nominal material rating. The field falls rapidly with distance and depends on magnet shape, shielding, surrounding materials and measurement orientation. Two magnets with the same gauss value at the surface can act differently in a device because field gradient and geometry matter.
For MRI, implanted medical devices, pacemakers, magnetic storage, scientific instruments, lifting magnets or workplace safety, use this page only to translate the units. It does not decide safe exposure, device compatibility, shielding or handling procedure. Read the instrument manual, site safety rules and product data sheet. If the value is part of a risk assessment, keep the original unit, converted value, measurement location and date in the same record.
Checking Instrument And Magnet Labels
Before converting, read the prefix and measurement point carefully. A handheld meter may show mG, G, microT or mT on the same display depending on range. A magnet listing may quote surface gauss, residual flux density, pull force or grade number, and those are not interchangeable. If a label says 2,000 G at the surface, the converter gives 0.2 T. If a meter says 2,000 mG, that is only 2 G, or 0.0002 T. The letter before the unit changes the answer far more than rounding.
For lab notebooks, write a full line rather than a bare number: value, unit, converted unit, probe distance, orientation and instrument range. A clear record might say “500 G surface reading, 0.05 T, axial probe, 10 mm from face”. That is much safer than replacing the original number with a converted value and losing how it was measured. Add the instrument model and calibration note when readings may be repeated later.
Worked Examples
| Problem | Calculation | Result | Comment |
|---|---|---|---|
| Convert 100 G | 100 x 0.0001 | 0.01 T | Also 10 mT. |
| Convert 1.5 T | 1.5 x 10,000 | 15,000 G | Keep the original T label for safety notes. |
| Convert 50 microT | 0.00005 T x 10,000 | 0.5 G | Small field values need careful prefixes. |
| Convert 3 T | 3 x 10,000 | 30,000 G | Large field; unit conversion is not a safety decision. |
FAQs
How many tesla are in one gauss?
One gauss is 0.0001 tesla. The same value can also be written as 0.1 millitesla or 100 microtesla. For small measurements, millitesla and microtesla often make the number easier to read.
How many gauss are in one tesla?
One tesla is 10,000 gauss. If a magnet is marked as 1.2 T, multiply by 10,000 and the value is 12,000 G. Keep both units in a technical note if the original specification matters.
Is gauss still used in the UK?
Gauss still appears in older textbooks, hobby magnet listings, geophysics notes and some product descriptions. SI documents prefer tesla, so conversion is often needed when mixing old and current specifications.
Is a larger gauss value always a stronger magnet?
It means a higher magnetic flux density at the stated measurement point. It does not fully describe pull force, distance behaviour, field shape, safety or whether the magnet suits a device.
Can I use this for MRI safety?
No. It converts units only. MRI safety depends on field strength, gradient, device labelling, site rules and clinical screening. Use official equipment guidance and trained staff advice.
Why does scientific notation help?
Small tesla values can contain many zeros. Scientific notation makes values such as 0.00005 T easier to compare, especially when working with microtesla or milligauss readings.
Sources
- International Bureau of Weights and Measures. (2019). The International System of Units (SI), 9th ed. BIPM. https://www.bipm.org/en/publications/si-brochure
- National Institute of Standards and Technology. (2008). Guide for the Use of the International System of Units. NIST Special Publication 811. https://www.nist.gov/pml/special-publication-811
- International Electrotechnical Commission. (n.d.). International Electrotechnical Vocabulary. IEC. https://www.electropedia.org/