< class="breadcumb-title text-anim" data-cue="slideInUp" data-delay="300">Radiology Converters
Professional Radiology Tools — Radiation, Absorbed Dose & Exposure Converters | ASLI FORM

Radiation Activity

Convert between Becquerel, Curie, Rutherford and other radioactivity units used in nuclear medicine and radiation safety.

Conversion Formula
1 Becquerel = 1 disintegration per second

Common Conversions

Quick reference table
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Understanding Radiology Units

Radiology and nuclear medicine use specialized units to measure different aspects of radiation. Understanding these units is critical for medical professionals, radiation safety officers, and nuclear scientists.

  • Radiation Activity Measures the rate of radioactive decay. SI unit: Becquerel (Bq). Traditional unit: Curie (Ci). Used in nuclear medicine dosing and radiation source calibration.
  • Absorbed Dose Measures energy deposited per unit mass of tissue. SI unit: Gray (Gy). Traditional unit: Rad. Critical for radiation therapy treatment planning.
  • Radiation Exposure Measures ionization in air from X-rays or gamma rays. SI unit: Coulomb/kg. Traditional unit: Roentgen (R). Used in radiation monitoring and safety.
  • Equivalent Dose Measures biological effect of radiation. SI unit: Sievert (Sv). Traditional unit: Rem. Accounts for different radiation types' biological effectiveness.
  • Dose Rate Measures dose delivered per unit time. Expressed as Gy/h, Gy/s, rad/h. Critical for radiation therapy delivery and safety monitoring.
  • Specific Activity Measures radioactivity per unit mass. Expressed as Bq/kg or Ci/kg. Used in environmental monitoring and radiopharmaceutical quality control.

How to Use Radiology Converters

Our radiology tools are engineered for medical professionals and scientists. Follow these steps for accurate conversions.

  • Select Category Choose from 6 radiology categories using the sidebar or mobile drawer.
  • Choose Source Unit Select the unit you're converting from (e.g., Gray, Becquerel, Sievert).
  • Choose Target Unit Select the unit you want to convert to from the second dropdown.
  • Enter Value Type your radiation value — the result appears instantly as you type.
  • View Formula The exact conversion formula is displayed for verification and documentation.
  • Swap Units Click the swap button to instantly reverse the conversion direction.

Why Medical Professionals Choose ASLI FORM

Built with precision engineering and validated against NIST standards, our radiology tools meet the demands of medical physics and nuclear science.

  • NIST-Standard Precision Results accurate to 10 significant digits using official conversion factors from NIST and BIPM.
  • SI & Traditional Units Support for both modern SI units (Gray, Sievert, Becquerel) and traditional units (Rad, Rem, Curie).
  • Instant Results Real-time conversion as you type — no buttons to click, no waiting.
  • Works Offline All calculations run locally in your browser. Perfect for clinical and field work.
  • Universal Compatibility From basic keypad phones to 4K displays — works on every device and operating system.
  • Zero Tracking No cookies, no analytics, no data collection. Patient and research data privacy is absolute.

Frequently Asked Questions

Gray (Gy) is the SI unit of absorbed dose, while Rad is the traditional unit. The conversion is straightforward: 1 Gray = 100 Rad. Gray is used in modern medical physics and radiation therapy worldwide, while Rad is still used in some older equipment and US regulations. Both measure the same physical quantity: energy deposited per unit mass of tissue (1 Gy = 1 J/kg).
Gray measures absorbed dose (physical energy deposited per unit mass), while Sievert measures equivalent dose (biological effect). For X-rays and gamma rays, 1 Gy = 1 Sv. For alpha particles, 1 Gy = 20 Sv due to higher biological damage. The relationship is: Equivalent Dose (Sv) = Absorbed Dose (Gy) × Radiation Weighting Factor (WR).
Becquerel (Bq) is the SI unit of radioactivity, representing one disintegration per second. Curie (Ci) is the traditional unit, originally defined as the activity of 1 gram of radium-226. The conversion is: 1 Curie = 3.7 × 10^10 Becquerel. Becquerel is used globally in modern nuclear medicine and radiation safety, while Curie is still used in some US regulations.
Roentgen (R) measures radiation exposure in air, specifically the ionization produced by X-rays or gamma rays. 1 Roentgen = 2.58 × 10^-4 Coulomb per kilogram. It's still used in some older radiation monitoring equipment and US regulations. The SI unit for exposure is Coulomb per kilogram (C/kg).
Our converters use NIST-standard conversion factors and are accurate to 10 significant digits. However, for clinical radiation therapy decisions, always verify with certified medical physics equipment and follow institutional protocols. These tools are excellent for education, quick reference, and preliminary calculations, but should not replace certified dosimetry equipment in clinical settings.
Absorbed dose (Gray/Rad) measures energy deposited per unit mass. Equivalent dose (Sievert/Rem) accounts for the biological effectiveness of different radiation types using radiation weighting factors. For example, alpha particles have a weighting factor of 20, making them 20 times more biologically damaging than gamma rays for the same absorbed dose. The formula is: H = D × WR, where H is equivalent dose, D is absorbed dose, and WR is the radiation weighting factor.
Rutherford (Rd) is a unit of radioactivity equal to 10^6 disintegrations per second (1 megabecquerel). It's named after Ernest Rutherford, the father of nuclear physics. While not commonly used in modern practice, it appears in some older literature and historical documents. The conversion is: 1 Rutherford = 10^6 Bq = 1 MBq.
Sievert (Sv) is the SI unit of equivalent dose, while Rem (Roentgen Equivalent Man) is the traditional unit. The conversion is: 1 Sievert = 100 Rem. Both measure the biological effect of radiation, accounting for different radiation types. Sievert is used globally in modern radiation protection, while Rem is still used in some US regulations.
Absolutely. Our radiology tools are designed with a mobile-first responsive approach and work perfectly on every device — from basic keypad phones to 4K desktop displays. The interface adapts intelligently: desktops get a sidebar, tablets get a collapsible sidebar, and mobile devices get optimized dropdowns. Touch interactions and scroll snapping are optimized for mobile use in clinical settings.
Several key features set us apart:
  • Premium design with sidebar navigation and fluid animations
  • Real-time conversion — no submit button needed
  • Formula explanations for educational value
  • Common conversions table for quick reference
  • Offline capability for clinical and field work
  • Zero tracking — complete privacy for patient data
  • Universal compatibility across all devices and operating systems
  • NIST-standard conversion factors for accuracy
No. We do not collect, store, or transmit any of the values you enter. All calculations happen entirely in your browser's memory and are destroyed the moment you close the tab. We use no analytics scripts, no cookies for tracking, and no third-party services that could see your conversions. Your privacy is absolute and non-negotiable — especially important when working with sensitive medical and research data.
We welcome feedback from our users. You can reach our support team through multiple channels:
  • Phone: +91-7011993433 (Mon-Sat, 9 AM to 7 PM IST)
  • WhatsApp: Same number with pre-filled message
  • Email: support@asliform.in
Our team reviews every piece of feedback and incorporates improvements regularly.

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