Neutron Star Calculator
Calculate physical properties of neutron stars and pulsars
Pulsar Properties (Optional)
Results for 1.4 M☉, R = 10 km
Average Density
6.647e+17 kg/m³
(2.89 × nuclear density)
Surface Gravity
1.858e+12 m/s² (1.89e+11 g)
Escape Velocity
192.793 × 10⁶ m/s (64.31% c)
Compactness (Rs/R)
0.4136
(Black hole at Rs/R = 1)
Gravitational Redshift (surface)
z = 0.3058
Minimum Rotation Period
0.461 ms
About Neutron Stars
Neutron stars are the collapsed cores of massive stars, composed primarily of neutrons. They are among the densest objects in the universe, with a teaspoon weighing billions of tons.
Typical Properties:
- Mass: 1.1 - 2.1 M☉
- Radius: 10-13 km
- Density: 10¹⁷ - 10¹⁸ kg/m³
- Surface B-field: 10⁸ - 10¹⁵ T
Mass Limits:
- TOV limit (max mass): ~2.1-2.3 M☉
- Below minimum: White dwarf
- Above maximum: Black hole