How it works
Fill in the 2 fields above and Telescope Magnification Calculator calculates the result instantly, recalculating as you change any value. The math runs locally in your browser — nothing is sent to a server.
Examples
- Telescope focal length 1200 mm, Eyepiece focal length 25 mm → Magnification: 48×
Frequently asked questions
How do I use the Telescope Magnification Calculator?
Enter your values in the 2 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
Is my data private?
Yes. The Telescope Magnification Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Telescope Magnification Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on astronomy and the rest of the platform, you can use it as often as you like.
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