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About this tool
Convert millisieverts to sieverts instantly. Free, bidirectional, and fully in-browser.
1 millisievert equals 0.001 sieverts — enter any millisievert value to convert it to sieverts instantly. This Millisievert to Sievert converter is a client-side tool: it applies a single multiplication (Sv = mSv × 0.001) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert sieverts back to millisieverts. A reference table lists common millisievert values already converted, and nothing you enter is sent to a server.
Open Millisievert to Sievert Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Millisievert field.
Read the equivalent in sieverts in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert sieverts to millisieverts.
The result updates as you type, and the swap button flips the conversion to sievert → millisievert without reloading.
The conversion uses the precise factor (Sv = mSv × 0.001), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One millisievert is 0.001 sieverts. Multiply the millisievert value by 0.001 to convert. For example, 10 mSv = 0.01 Sv.
Sv = mSv × 0.001. This tool applies it automatically and shows a worked example: 10 mSv = 0.01 Sv.
Yes. Press the swap button, or type into the sievert field, and the tool converts sieverts to millisieverts using the inverse of the same relationship.
It uses the standard radiation dose definition (Sv = mSv × 0.001), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Millisievert to Sievert Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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