Gray Converter
Convert Gray to Petagray and more • 73 conversions
0
Unit Explanations
GrayGy
Source UnitThe gray (Gy) is the SI derived unit of absorbed dose of ionizing radiation, defined as the absorption of one joule of radiation energy by one kilogram of matter. It quantifies the amount of energy deposited by radiation in a specified mass of material, which in biological contexts is often human tissue. The gray is crucial in assessing radiation exposure and its potential biological effects, and it serves as a fundamental unit in radiation safety and protection protocols.
Current Use
The gray is widely used in medical fields, particularly in radiation therapy for cancer treatment, where precise dosages are critical for effective treatment while minimizing damage to surrounding healthy tissue. It is also employed in radiological assessments, nuclear power, and safety protocols for radiation workers. Various international organizations, including the International Atomic Energy Agency (IAEA), utilize the gray for consistent communication regarding radiation exposure levels.
Fun Fact
The gray is equivalent to 100 rad, an older unit of absorbed dose.
PetagrayPg
Target UnitThe petagray (Pg) is a derived unit of absorbed dose in the International System of Units (SI), representing an absorption of energy of one joule per kilogram of matter. Specifically, one petagray equals 10^15 grays, where one gray is defined as the absorption of one joule of radiation energy by one kilogram of matter. This unit is used in high-energy applications, particularly in the fields of radiation therapy and nuclear physics, to quantify the immense doses of radiation absorbed in certain scenarios.
Current Use
Currently, the petagray is predominantly used in high-energy physics and radiation therapy to describe the amounts of radiation absorbed by materials or living tissues. In specialized medical treatments, such as cancer radiotherapy, extremely high doses may be required, making the petagray a practical unit for such applications. Additionally, it finds use in research related to nuclear accidents and radiation exposure assessments, providing a standardized measure for potentially hazardous radiation levels.
Fun Fact
The petagray is rarely used in everyday contexts due to the extremely high doses it represents.
All Radiation Conversions
127 convertersPopular Conversions
📐Conversion Formula
= × 1.00000How to Convert
To convert to , multiply the value by 1.00000. This conversion factor represents the ratio between these two units.
Quick Examples
💡 Pro Tip: For the reverse conversion ( → ), divide by the conversion factor instead of multiplying.
Gray
radiation • SI Unit
Definition
The gray (Gy) is the SI derived unit of absorbed dose of ionizing radiation, defined as the absorption of one joule of radiation energy by one kilogram of matter. It quantifies the amount of energy deposited by radiation in a specified mass of material, which in biological contexts is often human tissue. The gray is crucial in assessing radiation exposure and its potential biological effects, and it serves as a fundamental unit in radiation safety and protection protocols.
History & Origin
The gray was introduced in 1975 by the International System of Units (SI) as the unit of absorbed dose to provide a standardized measurement for radiation exposure. Its creation was a response to the need for a unified system that could facilitate consistency in scientific research and practical applications in radiology, nuclear medicine, and radiation therapy.
Etymology: The unit is named after the British physicist Louis Harold Gray, who made significant contributions to the field of radiation therapy and the study of radiation's effects on biological tissue.
Current Use
The gray is widely used in medical fields, particularly in radiation therapy for cancer treatment, where precise dosages are critical for effective treatment while minimizing damage to surrounding healthy tissue. It is also employed in radiological assessments, nuclear power, and safety protocols for radiation workers. Various international organizations, including the International Atomic Energy Agency (IAEA), utilize the gray for consistent communication regarding radiation exposure levels.
💡 Fun Facts
- •The gray is equivalent to 100 rad, an older unit of absorbed dose.
- •The gray is used in radiation therapy to ensure that the cancerous tissue receives a lethal dose while surrounding healthy tissue receives a much lower dose.
- •Louis Harold Gray was the first scientist to quantify the effects of radiation on living tissue, leading to advancements in cancer treatment.
📏 Real-World Examples
🔗 Related Units
Petagray
radiation • Non-SI
Definition
The petagray (Pg) is a derived unit of absorbed dose in the International System of Units (SI), representing an absorption of energy of one joule per kilogram of matter. Specifically, one petagray equals 10^15 grays, where one gray is defined as the absorption of one joule of radiation energy by one kilogram of matter. This unit is used in high-energy applications, particularly in the fields of radiation therapy and nuclear physics, to quantify the immense doses of radiation absorbed in certain scenarios.
History & Origin
The concept of measuring radiation doses originated in the early 20th century, largely influenced by the discovery of X-rays and radioactivity. The gray was established in 1975 by the International Commission on Radiological Protection (ICRP) as the SI unit for absorbed radiation dose. The prefix 'peta-' was added to denote multiples of the gray for large quantities, particularly useful in radiation therapy and nuclear physics contexts. The petagray became essential for expressing large doses in a manageable format, particularly relevant in advanced scientific research and medical applications.
Etymology: The term 'petagray' combines the SI prefix 'peta-', which signifies 10^15, and 'gray', named after British physicist Louis Harold Gray, a pioneer in radiation dosimetry.
Current Use
Currently, the petagray is predominantly used in high-energy physics and radiation therapy to describe the amounts of radiation absorbed by materials or living tissues. In specialized medical treatments, such as cancer radiotherapy, extremely high doses may be required, making the petagray a practical unit for such applications. Additionally, it finds use in research related to nuclear accidents and radiation exposure assessments, providing a standardized measure for potentially hazardous radiation levels.
💡 Fun Facts
- •The petagray is rarely used in everyday contexts due to the extremely high doses it represents.
- •The gray was named in honor of Louis Harold Gray, who made significant contributions to the understanding of radiation's effects on biological tissues.
- •In comparison, the common unit of gray represents much smaller doses, illustrating the vast scale of the petagray.
📏 Real-World Examples
🔗 Related Units
Related Radiation Conversions
Explore more radiation conversions for your calculations.
Frequently Asked Questions
How do I convert to ?▼
To convert to , multiply your value by 1. For example, 10 equals 10 .
What is the formula for to conversion?▼
The formula is: = × 1. This conversion factor is based on international standards.
Is this to converter accurate?▼
Yes! MetricConv uses internationally standardized conversion factors from organizations like NIST and ISO. Our calculations support up to 15 decimal places of precision, making it suitable for scientific, engineering, and everyday calculations.
Can I convert back to ?▼
Absolutely! You can use the swap button (⇄) in the converter above to reverse the conversion direction, or visit our to converter.