Flight Radiation Calculator

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Total block time in the air (gate to gate). Use decimals for part-hours.
hours
Cosmic radiation intensity increases with altitude and latitude. Polar and high-latitude routes receive the highest dose per hour.
For frequent flyers and crew: scales the single-flight dose up to an annual total so you can compare against occupational limits.
Toggles additional context against the ICRP pregnancy limit of 1 mSv over the gestation period.
Dose (this flight)Low dose
48uSv

Estimated cosmic radiation received on this flight in microsieverts.

Dose (mSv)0.048mSv
Pct of avg annual US background0.77%
Annual dose (at this rate)0.48mSv
Pct of annual aircrew limit2.4%
Equivalent dental X-rays9.6
Equivalent chest X-rays0.48
Dose rate used0.006mSv/h
48 uSv
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Estimated flight dose: 48.0 uSv (0.8% of annual background).

  • This flight exposes you to about 48.0 uSv (0.048 mSv) of cosmic radiation - roughly 0.8% of the average US annual background dose of 6.2 mSv.
  • For context, that is equivalent to about 10 dental X-rays or 0.48 chest X-rays.
  • Flying this route 10 times a year gives an estimated 0.48 mSv annually, which is 2.4% of the 20 mSv/year ICRP occupational limit for aircrew.

Next stepA single flight adds a trivial increment to your annual background dose - the risk from cosmic radiation is far smaller than many everyday exposures.

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