Formula
This calculator uses the equation below. Use it as a quick reference when checking setup before solving.
lambda = h / pPhysical Chemistry
De Broglie Wavelength Calculator
Solve lambda = h / p for wavelength or momentum in matter-wave quantum mechanics.
lambda = h / p
Run this calculator
Leave a nullable field blank to solve for it.
Variable glossary
Wavelength (wavelength)
de Broglie wavelength in meters (m). Set to null to solve.
Momentum (momentum)
Momentum in kg*m/s. Set to null to solve.
H (h)
Planck constant in J*s, default 6.62607015e-34.
Frequently Asked Questions
What does the De Broglie Wavelength calculator solve?
It solves De Broglie Wavelength problems in physical chemistry using your provided inputs and computes unknown values when nullable fields are left blank.
Do I need to convert units before using this tool?
Use the unit toggles where available (for example K/C and L/mL). ChemGenius converts values to the calculator's base units automatically before solving.
Can I save this result in my workflow?
Yes. After computing a result, you can continue into ChemGenius workflows like protocol drafting or notes to keep your calculation context attached to downstream work.