Lens Equation Calculator - Calculator Suite

Object Distance (do) in cm:

Image Distance (di) in cm:

Focal Length (f) in cm:

1/f = 1/do + 1/di

Leave one field empty to calculate it

Object Height (ho) in cm:

Object Distance (do) in cm:

Image Distance (di) in cm:

M = -di/do = hi/ho

Negative magnification = inverted image

Focal Length in meters:

Lens Type:

P = 1/f (in diopters)

Power is measured in diopters (D)
Positive = converging, Negative = diverging

Focal Length 1 (f₁) in cm:

Focal Length 2 (f₂) in cm:

Separation Distance (d) in cm:

1/f = 1/f₁ + 1/f₂ - d/(f₁f₂)

For thin lenses in contact: d = 0

🔍 Lens Equation Calculator