CPM to mR/hr (MRHR) Calculator
Convert CPM (radiation counts per minute) to mR/hr. MRHR/mrhr is a common shorthand for mR/hr. Two-way conversion, copyable summary, and optional AI insights.
This page assumes CPM = radiation counts per minute and mR/hr = milliroentgen per hour. The conversion depends on a calibration factor (CPM per mR/hr) for your specific detector/setup.
Example presets
Use the factor from your detector manual or calibration. Higher factor means lower mR/hr for the same CPM.
Factor presets
Mode
CPM to mR/hr
CPM (counts/min)
350
Factor
1,000
mR/hr
0.35
Formula
mR/hr = CPM / factor
Assumptions
This is an estimate using your factor (CPM per mR/hr). The factor is detector- and context-specific (energy response, geometry, distance, shielding, settings). Do not treat this as a safety decision. CPM here means radiation counts per minute, not marketing CPM.
Copyable summary
Get practical interpretation, assumptions, and next steps based on your inputs (AI does not change the formula).
Avoid sharing personal or sensitive data. AI output is advisory and may be inaccurate.
Helpful notes on calibration factors and CPM to mR/hr conversions:
Explore other quick radiation/unit calculators on MDZ.ai.
Features
Two-way conversion
Convert CPM to mR/hr or reverse-convert mR/hr to CPM on the same page.
Calibration-factor driven
Uses Factor = CPM per mR/hr so you don’t rely on misleading “universal” constants.
MRHR notation clarified
Explains MRHR/mrhr as shorthand for mR/hr, and keeps assumptions explicit to reduce confusion.
Copy + optional AI insights
Copy a clean summary and optionally get practical interpretation (with graceful fallback when AI is unavailable).
How it works
Pick a direction
Choose CPM to mR/hr for estimating exposure rate, or switch to mR/hr to CPM for reverse conversion.
Enter your factor
Use your detector manual or calibration certificate to find the factor (CPM per mR/hr).
Copy and share
Copy a clean summary (inputs, factor, result and formula) for logs or discussions.
FAQ
Need a quick CPM to mR/hr (MRHR) estimate?
Enter your calibration factor to convert instantly, then copy a shareable summary for logs or discussions.
Use calculatorDisclaimer: This calculator estimates mR/hr from CPM using a user-provided factor. It does not provide safety, medical, or regulatory guidance. Always rely on your instrument documentation and local radiation safety procedures.