Radiation conversion

Rads to Grays Converter

The input accepts a value expressed in rads and returns the equivalent in grays. A transparent equation and back-conversion help catch an incorrectly oriented ratio.

Source measurement

Enter rads

rad

Enter the amount stated in rads.

Where the conversion appears for Rads to Grays

People compare rads with grays in legacy absorbed-dose data, radiation physics, and SI reporting.

The rads to grays output preserves the same radiation quantity while changing its label from rad to Gy.

Following the multiplier in Rads to Grays

The numerical bridge from rad to Gy is 0.01. Multiply rads by 0.01 to obtain grays.

Multiply rads by 0.01 to obtain grays.

To audit rads to grays in the other direction, Divide grays by 0.01 to return to rads.

A worked quantity: rad to Gy

Enter 100 rad. The output is 1 Gy, following 100 × 0.01 = 1.

The three comparison cases below keep the rads to grays multiplier unchanged while the input magnitude varies.

50 rad0.5 Gy
100 rad1 Gy
250 rad2.5 Gy

Resolution that matters for grays

Keep additional Gy digits when grays will enter a later computation; round after that work is complete.

The resolution of rads still limits the defensible resolution of grays. Extra decimals cannot improve the original rad measurement.

The broad radiation converter can take rads to grays into more destination units. A related unit pair is sieverts to rem.

A separate reasonableness verification for Rads to Grays

One rad corresponds to 0.01 Gy; compare the output with that benchmark.

Reversing 1 Gy should return about 100 rad.

Definitions behind rad and Gy

Use rad only for rads and Gy only for grays. The rads to grays scale is 0.01.

Absorbed dose and dose equivalent are different physical quantities even when their unit factors look alike. The rads to grays definition is limited to rads and grays; a measure with a similar name requires its own specified method. A number without a label cannot show which side of rads to grays it belongs to. Keep rad or Gy attached whenever the quantity is copied.

Carrying the Gy output forward

Keep the unrounded Gy quantity when grays enters a total or formula. Store the input rad amount beside it, and rerun rads to grays if rads changes.

The unit ratio for Rads to Grays

One rad maps to 0.01 Gy. Reversing the rads to grays scale associates one Gy with 100 rad.

Place Gy above rad in a dimensional-analysis fraction so the starting-unit symbol cancels. An reversed fraction would instead solve the reverse conversion.

Using grays in context

In legacy absorbed-dose data, radiation physics, and SI reporting, copying an unlabeled starting number can hide whether it began in rad. Keep the rads label visible until rads to grays is complete.

When several grays values are combined, convert every input to Gy first. Mixing rad and Gy in one total would make the combined arithmetic invalid even if each individual number looked reasonable.

Questions about rads to grays

What is the formula for rads to grays?

Multiply rads by 0.01 to obtain grays. Divide grays by 0.01 to return to rads.

How can I verification the grays output?

Reverse the reported grays amount with the inverse rads to grays rule. It should reproduce the entered rads within the shown resolution.

Does zero rad equal zero Gy?

Yes. Zero rad maps to zero Gy because rads to grays has no zero-point offset.