Stellar properties, cosmology, black holes, gravitational lensing, and universe calculators.
Most used tools
Find stellar luminosity L = 4πR²σT⁴ from radius and temperature.
Determine star temperature T = b/λ_max using Wien's displacement law.
Find galaxy velocity or distance using v = H₀d.
Determine the event horizon radius r_s = 2GM/c² for a black hole.
Compute solar panel power output P = η × A × G in watts.
Find orbital period T² = (4π²/GM)a³ using Kepler's third law.
15 tools available
Find stellar luminosity L = 4πR²σT⁴ from radius and temperature.
Determine star temperature T = b/λ_max using Wien's displacement law.
Find galaxy velocity or distance using v = H₀d.
Determine redshift z from recession velocity using z = v/c.
Find the maximum white dwarf mass (~1.4 M☉) using the Chandrasekhar formula.
Determine the event horizon radius r_s = 2GM/c² for a black hole.
Find the light deflection angle θ = 4GM/(c²b) from a massive object.
Compute solar panel power output P = η × A × G in watts.
Convert between light years and parsecs for astronomical distances.
Find stellar distance d = 1/p from parallax angle in arcseconds.
Convert between magnitude difference and brightness ratio.
Find orbital period T² = (4π²/GM)a³ using Kepler's third law.
Determine tidal acceleration ΔF = 2GMr/d³ across an object's diameter.
Compute CMB temperature, wavelength, and energy from redshift.
Determine dark energy density Ω_Λ and total energy in the universe.
Our astrophysics calculators provide accurate, instant results for physics calculations. Whether you need to compute forces, velocities, energies, or other physical quantities, these tools have you covered.
