sievert to femtosievert
Convert sievert (Sv) to femtosievert (fSv). Use an editable equivalent dose converter, conversion formula, and reference table.
1 Sv = 1e+15 fSv
Conversion formula
One sievert equals 1e+15 femtosievert. Multiply your value in sievert by this factor to get femtosievert. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 sievert:5 × 1e+15 = 5e+15 fSv
Conversion table
| sievert (Sv) | femtosievert (fSv) |
|---|---|
| 0.01 | 1e+13 |
| 0.1 | 1e+14 |
| 1 | 1e+15 |
| 2 | 2e+15 |
| 5 | 5e+15 |
| 10 | 1e+16 |
| 25 | 2.5e+16 |
| 50 | 5e+16 |
| 100 | 1e+17 |
| 1000 | 1e+18 |
About these measurements
Equivalent dose uses weighting to describe radiation-related biological effects.
The base reference used here is the sievert. One sievert is 1 base units; one femtosievert is 1e-15 base units.
Important distinctions
This converts an already specified quantity. It does not calculate a personal risk or treatment.
Precision
The converter uses stored conversion factors and floating-point arithmetic. Results display up to ten significant digits, switching to scientific notation for very small or large values. Keep the precision of your original measurement when reporting results.
Common questions
How do I convert Sv to fSv?
Multiply the quantity in Sv by 1e+15. You can also type the value into the converter above.
Can I reverse the conversion?
Yes. Use the swap button or open the femtosievert to sievert converter.
Reference
NIST Guide to the SI — conversion factors and prefix conventions. SI prefixes scale units by powers of ten; the dimension-specific notes above describe the assumptions used on this page.
