What you provide
What you provide
- Lens focal length expressed in m, using the same scenario as the other inputs
- Object distance expressed in m, using the same scenario as the other inputs
PHYSICS / OPTICS
Thin Lens Image Distance Calculator
Calculate signed image distance using the thin-lens equation. Review the equation, substituted values, result, assumptions, and interpretation in one guided workspace.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Calculate signed image distance using the thin-lens equation. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
Calculation path
1/d_i=1/f-1/d_o
What you receive
What you receive
- Image distance in m from the stated equation
- A symbolic formula plus substituted working with your values
- Visible assumptions, field guidance, and an authoritative learning reference
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
This ideal SI model excludes real losses, tolerances, uncertainty, and safety design.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors