Time Dilation Calculator

Find how time slows at relativistic speed.

Proper time

Velocity

Dilated time 1.342

Lorentz factor (γ) 1.342

Formula: t' = t ÷ √(1 − v²/c²)

Step-by-step with your numbers:

1. Values used:

2. Proper time = 1

3. Velocity = 200,000,000

5. Dilated time = 1.342

6. Lorentz factor (γ) = 1.342

Did we solve your problem today?

Moving clocks run slow relative to a stationary observer.

The math behind it

t' = t ÷ √(1 − v²/c²). The Lorentz factor γ grows sharply near light speed.

1 s at 200,000 km/s → γ ≈ 1.34 (1.34 s observed).

At everyday speeds?

The effect is negligible until you approach c.