Femtosieverts to nanosieverts converter

Formula

Worked example

Convert 1 fSv to nSv:

1 fSv ≈ 0.000001 nSv

Multiply your fSv value by the factor above. The calculator uses the full conversion factor before rounding the displayed answer.

Femtosieverts to nanosieverts table

Reference values rounded to 10 significant digits. Use the converter above for other amounts.

What femtosieverts measure

Femtosieverts (fSv) represent equivalent dose units. One unit equals 10^-15 Sv. The sievert is the SI unit used for radiation protection quantities such as equivalent and effective dose.

Reading the result in nanosieverts

Nanosieverts (nSv) represent equivalent dose units. One unit equals 10^-9 Sv. The sievert is the SI unit used for radiation protection quantities such as equivalent and effective dose.

Where this conversion helps

Change the scale of a dose value whose meaning and weighting have already been established. A unit conversion does not calculate biological effects, assess safety or substitute for radiation-protection expertise.

How the scale changes

The input unit has a factor of 1e-15 Sv; the output unit has a factor of 1e-9 Sv. Multiply the entered number by the input factor, then divide by the output factor. The physical quantity stays the same while its numerical representation changes.

Reading very small or large results

Scientific notation keeps very small and large values readable: 2.5e-6 means 0.0000025. The converter calculates with 50 significant digits internally and displays up to 10. Exact unit definitions do not remove uncertainty from the original measurement.