All Astronomy Calculators Related Post

    Friedmann Equation Calculator Calculate the Hubble parameter, critical density, density parameters (Ωm, ΩΛ, Ωr, Ωk), and evolution of the universe using the Friedmann Equation. Hubble Constant H₀ (km/s/Mpc) Matter Density Parameter Ωm,0 (today) Dark Energy Density Parameter ΩΛ,0 (today) Radiation Density Parameter Ωr,0 (today, usually ~10⁻⁴) Redshift z (for H(z) calculation) Calculate Friedmann […]

Cosmic Acceleration Calculator Redshift (z) (optional, leave 0 for today) Hubble Constant H₀ (km/s/Mpc) Matter Density Ωₘ (today) Dark Energy Density ΩΛ (today) Calculate Cosmic Acceleration Results Deceleration Parameter q(z): – Acceleration Status: – Scale Factor Behavior: – Transition Redshift (q=0): – The Cosmic Acceleration Calculator is a powerful, scientifically accurate online tool that lets

    Matter-Radiation Equality Calculator The Matter-Radiation Equality Calculator is a precise scientific tool that determines the exact moment in cosmic history when the energy density of matter (baryons + cold dark matter) equaled the energy density of radiation (photons + neutrinos). This pivotal epoch, known as matter-radiation equality, occurred approximately 50,000–70,000 years after the

    Radiation-Domination Calculator The Radiation-Domination Calculator is a precise scientific tool designed to calculate when the early universe transitioned from the radiation-dominated era to the matter-dominated era. In the standard ΛCDM cosmological model, the universe was initially dominated by relativistic particles (photons and neutrinos) immediately after the Big Bang. This radiation-dominated phase lasted until

    Matter-Domination Calculator Matter-Domination Calculator Use this scientific tool to calculate the exact cosmic time and redshift range when the universe was dominated by matter (non-relativistic matter including dark matter and baryons). Matter Density Parameter (Ωₘ,₀) today Radiation Density Parameter (Ωᵣ,₀) today (optional, auto-calculated if empty) Hubble Constant h (H₀ = h × 100

  Dark Energy Equation of State Calculator Calculate the dark energy equation of state parameter w for various cosmological models using the latest scientific formulas. Cosmological Model ΛCDM (w = -1 exact)wCDM (constant w)CPL (Chevallier-Polarski-Linder) Redshift z w₀ (present-day value) wₐ (evolution parameter) Calculate Dark Energy Equation of State About the Dark Energy Equation of

    Inflationary Potential Calculator Calculate the inflationary potential V(φ), slow-roll parameters, and Hubble parameter using peer-reviewed slow-roll inflation formalism. Inflation Model Chaotic Inflation (m²φ²)Starobinsky R² InflationHiggs Inflation (λ(φ² – v²)²)Power-Law Potential (V₀ φⁿ)Natural Inflation (Λ⁴ [1 – cos(φ/f)])Custom V(φ) in Planck units Scalar Field Value φ (in Planck units, Mₚ = 1) Model Parameter

    Scalar Field Energy Calculator Accurate Quantum & Scientific Tool Based on Quantum Field Theory Time Derivative (∂φ/∂t) In natural units (ħ = c = 1) or specify units Spatial Gradient Magnitude |∇φ| Same units as ∂φ/∂t Potential Energy Density V(φ) Energy density units Volume of Region e.g., m³, fm³, or natural units³ Calculate

  Reheating Energy Calculator The Reheating Energy Calculator is a scientifically accurate, free online tool designed to calculate the precise thermal energy required to reheat steel billets, slabs, blooms, or ingots in industrial reheating furnaces such as pusher-type, walking beam, or rotary hearth furnaces. Built strictly on established thermodynamic principles and peer-reviewed heat transfer equations,

    Power Spectrum Amplitude Calculator Accurately calculate Power Spectral Density (PSD), RMS amplitude, and total power from your frequency-domain data. Power per Frequency Bin (linear, e.g., V² or W) Enter values separated by commas, spaces, or new lines Frequency Bin Width Δf (Hz) Output PSD Unit Per Hz (V²/Hz, W/Hz)dB/Hz Reference Power for dB