How many gauss is 1 tesla?

Exactly 10,000 gauss (G) equals 1 tesla (T). This is a defined conversion: 1 T = 10⁴ G.

What is the difference between gauss and tesla?

Both measure magnetic flux density (B-field). Gauss is the CGS (centimetre-gram-second) unit; tesla is the SI unit. Tesla is far larger — the Earth's field is about 0.5 G (50 µT), while a fridge magnet is around 100 G (0.01 T).

When should I use gauss instead of tesla?

Gauss is common in older literature, US lab equipment datasheets, and fields like geology/geophysics where values are in the sub-tesla range. SI (tesla) is preferred in modern physics, engineering standards, and medical imaging.

What is milliTesla (mT)?

1 mT = 0.001 T = 10 G. It's commonly used for industrial magnets, therapeutic devices, and Hall-effect sensors, where values sit between the tiny µT (geophysics) and the large T (MRI) ranges.

Is this conversion exact?

Yes. The factor 1 T = 10,000 G is an exact definition with no rounding. Results here are limited only by JavaScript's 64-bit floating-point precision.

Gauss to Teslas Converter

Enter a value in gauss or tesla and get the converted result plus milliTesla and microTesla equivalents instantly.

Input

Value in Gauss (G)

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Results

Enter a value on the left to see the conversion.

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Summary

Magnetic flux density can be expressed in gauss (G) — the CGS unit — or in tesla (T), the SI unit. One tesla equals exactly 10,000 gauss. This converter handles both directions and also shows milliTesla (mT) and microTesla (µT) values for common reference ranges used in electronics, physics, and medical imaging.

How it works

Choose whether your starting value is in gauss or tesla.
Type the number into the input field.
The converter applies the exact factor: 1 T = 10,000 G.
Results in T, mT, µT (from gauss), or G (from tesla) appear instantly.
Use the swap button to reverse the direction without retyping.
Copy any individual result with one click.

Use cases

Convert earth's magnetic field readings (≈ 0.25–0.65 G) to tesla for SI calculations.
Cross-check MRI machine field strengths (1.5 T, 3 T) in gauss for legacy references.
Convert Hall-effect sensor output (mT range) to gauss for datasheet comparison.
Translate electromagnet specifications between CGS lab notes and SI documentation.
Verify permanent magnet ratings published in mixed unit systems.
Quick classroom reference for physics and electrical engineering coursework.

Frequently Asked Questions

Last updated: 2026-06-13 · Reviewed by Nham Vu