Deep Space Trip Time Estimator

Quick, order-of-magnitude travel times across the Solar System and to nearby stars. This tool treats space like a straight road between two points and ignores gravity and orbital mechanics.

Geometry: straight line between objects. No gravity assists, no curved paths.
Acceleration mode: start at 0 km/s, accelerate for half the distance, then decelerate symmetrically to arrive at 0 km/s.
Impulse mode: two instantaneous burns (start/stop) that sum to total Δv. Coasts at cruise speed between.
Conjunction/opposition: If both start and end are within 10 AU of the Sun, the result shows a range using minimum distance and maximum distance.
Relativity: if peak speed ≥ 1% of c, the model reduces coordinate acceleration with γ and also reports the traveler’s experienced time.
Discretization: acceleration scenarios integrate over 101 equally spaced segments.

This is a simplified educational model. Real mission design must use n-body dynamics and precise navigation.

Start

Destination

Mode

Acceleration

Speed must be < c. Units convert automatically.

Results non‑relativistic

Enter inputs and click Calculate.

Results non‑relativistic

Details