Ans

Unit converter

Magnetic flux density.

Convert G to T, or pick any of the 5 units in the menus. Type in either box and the other follows. Flux density in tesla and gauss, spanning the Earth's 50 µT and an MRI scanner's 3 T.

G → TExact definition
—
Gausses to teslas — common values, to 6 significant figures.
GT
1 G0.0001 T
2 G0.0002 T
3 G0.0003 T
4 G0.0004 T
5 G0.0005 T
10 G0.001 T
15 G0.0015 T
20 G0.002 T
25 G0.0025 T
50 G0.005 T
75 G0.0075 T
100 G0.01 T
250 G0.025 T
500 G0.05 T
1000 G0.1 T
1 G=0.0001 T 1 T=10000 G

Definitions

  • The gauss is exactly 10⁻⁴ T. Magnet suppliers and older physics texts quote it, so a fridge magnet is a few hundred gauss.
  • The tesla is the SI unit of magnetic flux density. An MRI scanner runs at 1.5 to 3 T; the Earth's field is around 50 µT.
  • Every unit here is defined against the T.
  • Every unit in the menus is exact by definition, so the only rounding on this page is the one you choose for the display.

How it works

Every value is converted into teslas and then back out into the unit you asked for. One route covers every pairing in the menus, so an unusual combination is no less accurate than a common one, and adding a unit affects only that unit.

Both boxes are live. Whichever one you last typed in is the source, changing either menu recalculates straight away, and Swap exchanges the units and the values so the number you are reading stays where you are looking.

Display precision sets a maximum number of significant figures and trims trailing zeroes, so it changes what you see and never what was calculated. The editable box always holds a plain number at full working precision, so you can carry on from either side.

Common questions this answers: how many teslas in a gauss (0.0001), how many gausses in a tesla (10000), and what 10000 G is in teslas (1 T).

From the maker of Ans — a scientific calculator you can own. Same idea: a proper instrument, nothing in the way.