How it works
Fill in the 2 fields above and Thin Lens Equation Calculator calculates the result instantly, recalculating as you change any value. It applies the formula 1/f = 1/do + 1/di. The math runs locally in your browser — nothing is sent to a server.
Formula
1/f = 1/do + 1/diExamples
- Focal length 10 cm, Object distance 30 cm → Image distance: 15 cm
Frequently asked questions
How do I use the Thin Lens Equation 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.
What formula does the Thin Lens Equation Calculator use?
It uses 1/f = 1/do + 1/di. The calculation is performed in your browser using standard, well-established math for accurate results.
Is my data private?
Yes. The Thin Lens Equation Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Thin Lens Equation Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on science and the rest of the platform, you can use it as often as you like.
Popular in Science
Reynolds Number Calculator
Calculate the Reynolds number of a flow.
Doppler Effect Calculator
Calculate the observed frequency from a moving source.
Photon Energy Calculator
Calculate the energy of a photon from its wavelength.
De Broglie Wavelength Calculator
Calculate the de Broglie wavelength of a particle.