Numerari from KnowledgeDoor---The scientific calculator with graphing, unit keypads, complex numbers, constants, advanced functions, user-defined keys, quick copy, and more! Learn more (Link leaves KnowledgeDoor website)




Other Names

rontgen, R

Metric (SI) Equivalent

258 microcoulombs / kilogram

This equivalent and the one below are exact.

Another Metric (SI) Equivalent with More Basic Units

258 microsecond amperes / kilogram

Metric (SI) Dimensions

mass-1 × time × electric-current


Radiation Exposure

Heaven's Boulevard astronomical sky image for any location, date, and time. Personalize with a picture and message. Great gift for birthdays, anniversaries, or any special event. Learn more (Link leaves KnowledgeDoor website)