Luminosity Distance Calculator
Calculate cosmological distances using the ΛCDM model
Cosmological Parameters
Magnitude (Optional)
About Luminosity Distance
The luminosity distance relates the intrinsic luminosity of an object to its observed flux. In an expanding universe, it differs from other distance measures due to cosmological effects.
Key Relations:
- DL = (1 + z) × DC (flat universe)
- DL = (1 + z)² × DA
- μ = m - M = 5 log₁₀(DL/10pc)
- F = L / (4πDL²)
Standard Cosmology (Planck 2018):
- H₀ = 67.4 ± 0.5 km/s/Mpc
- Ωm = 0.315 ± 0.007
- ΩΛ = 0.685 ± 0.007
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: University Physics
by Young & Freedman
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.