femtosievert to sievert
Convert femtosievert (fSv) to sievert (Sv). Use an editable equivalent dose converter, conversion formula, and reference table.
1 fSv = 1e-15 Sv
Conversion formula
One femtosievert equals 1e-15 sievert. Multiply your value in femtosievert by this factor to get sievert. For the reverse conversion, divide by the same factor.
Worked example
To convert 5 femtosievert:5 × 1e-15 = 5e-15 Sv
Conversion table
| femtosievert (fSv) | sievert (Sv) |
|---|---|
| 0.01 | 1e-17 |
| 0.1 | 1e-16 |
| 1 | 1e-15 |
| 2 | 2e-15 |
| 5 | 5e-15 |
| 10 | 1e-14 |
| 25 | 2.5e-14 |
| 50 | 5e-14 |
| 100 | 1e-13 |
| 1000 | 1e-12 |
About these measurements
Equivalent dose uses weighting to describe radiation-related biological effects.
The base reference used here is the sievert. One femtosievert is 1e-15 base units; one sievert is 1 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 fSv to Sv?
Multiply the quantity in fSv 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 sievert to femtosievert 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.
