How to use the apparent depth in water calculator
Find how shallow a submerged object looks when viewed from directly above. Enter actual depth, refractive index in the fields above; the apparent depth viewed from above is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “apparent depth of fish”, “object under water looks shallower”, “apparent depth”, “calculate apparent depth in water”, “find apparent depth viewed from above”.
Formula
Variables
- d — Actual depth (m)
- n — Refractive index
Worked example
With actual depth = 2 m, refractive index = 1.33, the calculator gives apparent depth viewed from above ≈ 1.503759 m.
Frequently asked questions
What is the apparent depth in water calculator used for?
Find how shallow a submerged object looks when viewed from directly above. It helps with questions such as “apparent depth of fish”, “object under water looks shallower”, “apparent depth”.
What is the formula for the apparent depth in water calculation?
Apparent depth viewed from above (m) = d / n. Here d is actual depth (m), n is refractive index.
What inputs do I need for the apparent depth in water calculator?
You need actual depth in m, refractive index. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the apparent depth in water calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the apparent depth in water result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.