How long to 100D? Enter a world’s diameter and your ship’s M-drive to get distance, total time, and peak midpoint velocity—at a glance.
Time to 100D (Minimum Safe Jump Distance)
Traveller 100×Diameter jump-limit calculator: enter diameter & M-drive to get distance, total time, and peak velocity.
Tip: choose a preset to auto-fill.
Traveller M-drive rating in multiples of 1G (9.80665 m/s²).
Distance to 100D
100 × Diameter
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Total Time
Accelerate halfway, decelerate halfway
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Peak Midpoint Velocity
At the 50% distance point
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Assumptions: No atmosphere/traffic constraints; straight-line radial climb; constant thrust at G × 9.80665 m/s²; symmetric flip-and-burn profile.
Formula: t = 2 × √(d / a), where d (m) = 100 × diameter_km × 1000, a (m/s²) = G × 9.80665. Peak velocity vₚ = √(a × d).
Made for Traveller referees & crews who want to leave the well fast. ✦
