Radiation Converter

Convert between absorbed dose units and equivalent dose units using a fast radiation converter. This page also keeps the formula, examples, FAQs, and references close by so you can check the result with confidence.

What This Radiation Converter Helps You Do

1 Gy equals 100 rad, and 1 Sv equals 100 rem. Review the formula and examples below if you want to see how the result is derived.

This page is meant to give you a fast answer, but it also helps you double-check the math before you make a decision. Start with the inputs that you already know, run the calculation, and then compare the output with the formula, examples, and FAQs below so you can see whether the answer fits the situation you are modeling.

If the result looks off, the usual causes are a unit mismatch, a missing decimal, the wrong scenario, or a value that needs to be entered as a rate instead of a total. The notes on this page are designed to make those checks easy without forcing you to leave the calculator and search for context elsewhere.

  • Use the calculator first for a quick estimate.
  • Use the formula to understand how the result is built.
  • Use the examples to compare common use cases.
  • Use the references when the answer depends on a standard or assumption.

Common Checks

A quick result is useful, but the best result is one that still makes sense when you look at it a second time. If you are comparing scenarios, try changing one input at a time so you can see which variable has the biggest impact on the final answer. That makes it much easier to spot whether the calculation matches your expectations.

It also helps to keep the context of the problem in mind. A calculator can tell you the math, but you still need to decide whether the input represents a total, a rate, an average, or a category-specific assumption. When in doubt, start with a simple example from the page and scale up from there.

  • Check that every unit matches the rest of the problem.
  • Keep rates, totals, and averages separate.
  • Adjust one variable at a time when testing scenarios.
  • Use the smallest realistic input first, then scale upward.

Scenario Planning

This calculator is especially useful when you want a quick answer before you commit time, money, or effort. Try one baseline input set, then change a single number and compare the result so you can see how sensitive the answer is to that variable.

That makes the page useful for more than just arithmetic. It becomes a small decision aid that helps you compare options, test assumptions, and explain the final number with confidence when you need to share it with someone else.

Converted Result

--

Quick Answer: 1 Gy equals 100 rad, and 1 Sv equals 100 rem. Review the formula and examples below if you want to see how the result is derived.

How to Calculate Radiation Converter

  1. Enter the dose: Type the value you want to convert.
  2. Choose the input unit: Pick the unit that matches your source value.
  3. Choose the output unit: Select the unit you want the answer shown in.
  4. Read the result: The calculator shows the converted dose immediately.

Radiation Converter Formula

dose = base unit x conversion factor
Variable Meaning Unit
Gy Absorbed dose in gray Gy
Sv Equivalent or effective dose in sievert Sv
BED Banana equivalent dose uSv

Worked Examples

USA - 1 Gy to rad
  • Dose value: 1
  • Input unit: Gy
  • Output unit: rad

Result: 100

One gray equals one hundred rad.

UK - 100 rad to Gy
  • Dose value: 100
  • Input unit: rad
  • Output unit: Gy

Result: 1

One hundred rad equals one gray.

EU - 1 mSv to rem
  • Dose value: 1
  • Input unit: mSv
  • Output unit: rem

Result: 0.1

One millisievert equals one tenth of a rem.

GCC - 1 BED to uSv
  • Dose value: 1
  • Input unit: BED
  • Output unit: uSv

Result: 0.1

One banana equivalent dose is about 0.1 microSievert.

Radiation reference

Common absorbed-dose and equivalent-dose conversions.

Range Meaning Action
Absorbed dose Gy, mGy, rad Useful for physical energy deposition.
Equivalent dose Sv, mSv, uSv, rem, mrem, BED Useful for biological effect comparisons.
Cross-group mismatch Absorbed and equivalent units mixed together Choose units from the same group.
Common absorbed-dose and equivalent-dose conversions.
Unit Base relationship Group
Gy 1 Gy = 100 rad Absorbed
mGy 0.001 Gy Absorbed
Sv 1 Sv = 100 rem Equivalent
BED 0.1 uSv Equivalent

Frequently Asked Questions

Gy measures absorbed energy, while Sv measures biological effect.

BED means banana equivalent dose and is a lighthearted way to express tiny radiation amounts.

No. Pick units from the same group for a valid conversion.

Yes. Those are both equivalent-dose units.
Planning note: Do not mix absorbed-dose units and equivalent-dose units in the same conversion. Check the unit group first.

References

Last reviewed: March 28, 2026