How many gauss is 1 tesla?

Exactly 10,000 gauss (G). This is a defined conversion with no rounding: 1 T = 10⁴ G.

What is the difference between tesla and gauss?

Both measure magnetic flux density (B-field). Tesla is the SI unit used in modern physics, engineering, and medical imaging. Gauss is the CGS unit, still common in older literature, US lab equipment datasheets, and geophysics. One tesla is 10,000 times larger than one gauss.

What are typical magnetic field values in teslas?

Earth's surface field is about 25–65 µT (0.00005–0.000065 T). A fridge magnet is roughly 0.001–0.01 T. Clinical MRI machines operate at 1.5 T or 3 T. Research magnets reach 20–45 T.

When would I use gauss instead of tesla?

Gauss appears in older scientific literature, legacy US instruments, and fields like geology where field values are well below 1 T. If a datasheet or publication was written before 1980 or targets a US industrial audience, gauss is common. Modern SI-compliant work uses tesla.

Is this conversion exact?

Yes. The factor 1 T = 10,000 G is an exact definition with no rounding. The only limit is JavaScript's 64-bit floating-point precision, which is more than sufficient for any practical application.

What is milliTesla (mT) and microTesla (µT) in gauss?

1 mT = 0.001 T = 10 G. 1 µT = 0.000001 T = 0.01 G. MilliTesla is used for industrial magnets and therapeutic devices; microTesla is common in geophysics and biomagnetic measurements.

Teslas to Gauss Converter

Enter a value in teslas and get the exact equivalent in gauss, plus milliTesla and microTesla for quick cross-reference.

Enter Teslas

Teslas (T)

Result in Gauss (G)

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Common Magnetic Field Strengths

Tesla (T)	Gauss (G)	Source
0.00005	0.5	Earth's magnetic field
0.001	10	Small fridge magnet
0.01	100	Strong fridge magnet
1	10,000	Strong lab magnet
1.5	15,000	Clinical MRI (standard)
3	30,000	High-field MRI
45	450,000	Strongest continuous magnet

Conversion factor: 1 T = 10,000 G | 1 G = 0.0001 T

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Summary

This converter turns any tesla value into gauss using the exact factor: 1 T = 10,000 G. Both are units of magnetic flux density (B-field) — tesla is the SI standard while gauss belongs to the older CGS system. Alongside the gauss result you see milliTesla and microTesla equivalents, which are useful when working with sensor datasheets, lab notes, and geophysics data that mix unit systems.

How it works

Enter a magnetic flux density value in teslas.
The converter multiplies by 10,000 to produce gauss.
MilliTesla and microTesla equivalents update at the same time.
Copy any individual result with one click.
Use the reference table to compare common field strengths.

Use cases

Convert MRI machine field strengths (1.5 T, 3 T) to gauss for legacy equipment references.
Translate Hall-effect sensor specs from tesla to gauss for CGS-based datasheets.
Cross-check permanent magnet ratings that appear in mixed unit documentation.
Convert electromagnet design values for older CGS lab notes.
Verify geomagnetic field readings when switching between SI and CGS literature.
Quick classroom reference for physics and electrical engineering courses.

Frequently Asked Questions

Last updated: 2026-06-19 · Reviewed by Nham Vu