Special Relativity Calculator

Calculate relativistic effects from Einstein's special relativity.

  • Free Online Tool
  • Instant Results
  • Mobile Friendly
  • No Installation
  • Secure & Private

Understanding This Calculator

Special Relativity Formulas

Effects at high velocities (near speed of light c).

  • Energy: E = mc²
  • Lorentz Factor (γ): 1 / √(1 - v²/c²)
  • Dilated Time: t = γ × t₀
  • Contracted Length: L = L₀ / γ

Example 1

Mass: 1kg

  • E = 1 × (3e8)² = 9 × 10¹⁶ J

Example 2

v = 0.6c

  • γ = 1 / √(1 - 0.36) = 1/0.8 = 1.25
  • Time moves 1.25x slower.

How to Use

  • Enter mass for rest energy.
  • Enter velocity for relativistic effects.

Frequently Asked Questions

How do I use the Special Relativity Calculator?

Enter your values in the input fields, and the result will appear instantly.

Is this calculator free to use?

Yes, this calculator is 100% free and does not require any registration or subscription.

Is it mobile-friendly?

Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.