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Both calculators run independently — change the inputs on either side to compare results.

Numerical Aperture Calculator

Calculate the numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding. NA determines light-gathering ability and the maximum acceptance angle of the fiber.

Core Refractive Index

Cladding Refractive Index

Fill in the required fields to see your result.

Optics

Diffraction Grating Calculator

Find the diffraction angle for any order of light passing through a grating using the grating equation. Ideal for optics lab work, spectroscopy setups, and physics coursework.

Wavelength (nm)

Grating Spacing (nm)

Diffraction Order

Fill in the required fields to see your result.

Key differences

	Numerical Aperture Calculator	Diffraction Grating Calculator
Category	Optics	Optics
Inputs required	2	3
Result	Numerical Aperture	Diffraction Angle (°)
What it does	Calculate the numerical aperture (NA) of an optical fiber from the refractive indices of its core and cladding. NA determines light-gathering ability and the maximum acceptance angle of the fiber.	Find the diffraction angle for any order of light passing through a grating using the grating equation. Ideal for optics lab work, spectroscopy setups, and physics coursework.