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These tools illustrate published standards and research. They are simplified, unvalidated and not reviewed. Do not use them to diagnose, treat, clear anyone to fly, or plan real operations. All calculations run in your browser; nothing you enter is stored or sent.

TLS-01 · Interactive tool · Tools

Mission Radiation Dose Estimator

Also: space radiation calculator · career dose limit

Radiation Oncology Preflight & Training In-flight Lifetime Surveillance LEO long-duration Cislunar / Lunar orbit Lunar surface Mars transit & surface Clinician Public Student Operator / Spaceflight participant Astronaut & candidate

draft AI-assisted Last reviewed: Pending review · Reviewer: Pending review

Bottom line

NASA limits career spaceflight radiation to below 600 mSv effective dose for everyone, regardless of age or sex [V1 4030] [1]. ◆◆◆◆ High · E
A typical ~6-month space station mission averaged 72 mSv, about 0.4 mSv per day [3]; NASA's planning estimate for a long Mars mission is 1,413 mSv, more than twice the limit [2]. ◆◆◆◇ Moderate · F C
Shielding helps against solar storms but barely against cosmic rays, so mission length is the main control; the Curiosity rover measured about 0.66 sievert for a Mars round trip [4]. ◆◆◆◇ Moderate · F
For clinicians: record mission dose next to imaging history, and keep age-appropriate cancer screening.

Proposed certainty (◆ High → ◇ Very low) and evidence-type tags: F flight · A analog · M model/animal · C computational · E expert/operational/standards. AI-proposed, pending reviewer confirmation. How to read the grades.

Calculator · mission radiation dose

Educational only · not for clinical or operational decisions

How do you want to estimate the mission dose?

Pick a NASA reference mission Days × daily dose rate

NASA reference mission NASA planning estimates per mission [2]

Earlier spaceflight dose (mSv)From the person's dose record, if known. Medical imaging is not counted [1].

This mission—millisieverts (mSv), effective dose

Career total—of the 600 mSv limit

Margin left—

Earth comparison—years of average natural background on Earth (~3 mSv/yr) [2]

Career dose vs NASA limit (600 mSv)Below limit

600 limit

Mars round trip ≈ 660

03006009001,200+ mSv

Limits: NASA-STD-3001 Vol. 1 [V1 4030] and Table 4.8-1 [1]. Mars round trip: 0.66 ± 0.12 Sv measured by the Curiosity rover's cruise detector [4]. Nothing you enter leaves your browser.

How it works

The estimator adds the person’s earlier spaceflight dose to an estimate for this mission, then compares the total with NASA’s career limit.

Quantity	Value used	Source
Career limit	Below 600 mSv effective dose, same for all ages and sexes	NASA-STD-3001 [V1 4030] [1]
Reference missions	21 to 1,413 mSv per mission, by mission type (for example 250 mSv for a long low-Earth-orbit stay)	NASA planning estimates [2]
Space station rate	About 0.4 mSv/day: 72 mSv average for ~6-month missions, divided by ~182 days	Derived from [3]
Deep space and surface rates	1.5 mSv/day unshielded deep space at solar minimum; habitat design maximums 1.3 (deep space) and 0.9 (surface) mSv/day; about 0.5 mSv/day surface environment	NASA-STD-3001 rationale and [V1 4033] [1]
Mars round-trip marker	0.66 ± 0.12 sievert (660 mSv) for the shortest round trip with current propulsion	Curiosity rover measurements [4]
30-day organ limit (for scale)	250 mGy-Eq for blood-forming organs	Table 4.8-1 [1]
Earth background	About 3 mSv per year from natural sources	[2]

Formula. Mission dose = days × daily rate (or the NASA reference value). Career total = earlier dose + mission dose. Percent of limit = career total ÷ 600.

Reading the result

Below the limit does not mean “no risk”. The limit was set to keep the average added lifetime risk of cancer death below 3% [1].
Medical imaging is not counted against the spaceflight limit, but it is tracked [1]. Clinicians should still apply “as low as reasonably achievable” (ALARA) to imaging.
Mars-class missions exceed the limit with current technology: NASA’s own reference Mars mission estimate is 1,413 mSv [2].

Limits of this tool

Real dose rates change with the solar cycle, orbit, shielding and solar storms. A constant daily rate is a simplification.
The station rate is a long-term average from 19 astronauts; individual missions differ [3].
The 30-day bar compares unlike quantities (effective dose vs. organ dose) and is not a compliance check.
No dose is calculated for any real person. Ask the operator or agency for the person’s dosimetry record.

Evidence profile

Overall certainty: ◆◆◆◇ Moderate (proposed)
Evidence types: F · Flight dataC · ComputationalE · Expert / operational / standards
Literature through: 2026-10-14
Validation: Formulas checked against the cited sources; tool output not clinically validated
Credit: Educational only; no CME or other credit

Requirements referenced 3

Requirement	Title	Plain-language meaning
[V1 4030]	Career Space Permissible Exposure Limit for Spaceflight Radiation	Career effective dose from spaceflight must stay below 600 mSv, for all ages and sexes.
[V1 4031]	Short-Term Radiation Limits	Vehicles protect crew from a reference solar storm to below 250 mSv.
[V1 4033]	Crew Radiation Limits from Galactic Cosmic Radiation	Habitats for missions over 60 days keep cosmic-ray dose below 1.3 mSv/day in free space and 0.9 mSv/day on a planetary surface.

IDs as published in NASA-STD-3001 Vol. 1 Rev C (2023-09-15) and NASA-STD-3001 Vol. 2 Rev F (2026-07-14). NASA-STD-3001 binds NASA programs; it is not a regulation for commercial flights. Paraphrased. Standards quick reference.

References 4

NASA OCHMO. NASA-STD-3001, Volume 1: Crew Health, Revision C (2023). [V1 3004], [V1 3017], [V1 3018], [V1 4030]–[V1 4033] and Table 4.8-1. www.nasa.gov/wp-content/uploads/2023/11/nasa-std-3001-vol-1-… Standard E
NASA Human Research Program. Evidence Report: Risk of Ionizing Radiation Carcinogenesis (2026). Table 3, Design Reference Mission categories. humanresearchroadmap.nasa.gov/evidence/reports/HRP-ER-CANCER… NASA C
Cucinotta FA, Kim MH, Willingham V, George KA. Physical and biological organ dosimetry analysis for International Space Station astronauts. Radiat Res. 2008;170(1):127–138. doi:10.1667/RR1330.1 PMID:18582161 Peer-reviewed F
Zeitlin C, Hassler DM, Cucinotta FA, et al. Measurements of energetic particle radiation in transit to Mars on the Mars Science Laboratory. Science. 2013;340(6136):1080–1084. doi:10.1126/science.1235989 PMID:23723233 Peer-reviewed F

Machine-checked on 2026-10-14: each URL was fetched, each DOI's title and year matched via Crossref, PubMed IDs matched to DOIs, and every number used in a calculation was checked against the source text (abstract, NASA document, regulation or official web page). Human verification against full text is still required before review.

Article info

Authors: Pending (AI-assisted draft)
Reviewer: Pending review
Last reviewed: Pending review
Literature through: 2026-10-14
AI-assisted: Yes (disclosed)
COI: Pending
License: CC BY-SA 4.0 (text); code MIT
Privacy: Runs entirely in your browser; no inputs stored or sent
Use: Educational only · not for clinical decisions · Disclaimer
Cite this version: Pending first edition

Educational use only · not medical advice · not for clinical decisions · Disclaimer · CC BY-SA 4.0