RSA Key Strength
Calculate RSA Key Strength instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
RSA Key Strength
p (prime)
q (prime)
n = p·q
221
More about: RSA Key Strength
What it calculates
The “RSA Key Strength” calculator computes n = p·q from 2 parameters: p (prime), q (prime).
Standard IT calculations for developers and sysadmins.
Example calculation
With parameters p (prime) = 13, q (prime) = 17 the result is 221 (φ(n) = 192).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.