Three variables, three formulas, one triangle that handles them all. Drilled into school, useful for a lifetime.
Most people learn the formula once in school and never touch it again — until life forces them to. Three variables, three formulas, one triangle that handles them all. Drilled into school, useful for a lifetime.
Speed = distance / time. Distance = speed × time. Time = distance / speed.
km/h × hours = km. m/s × seconds = m. Mixing units is the #1 mistake.
Same distance at 60 km/h then 30 km/h averages 40 km/h (harmonic mean), not 45.
Road trips, running pace, flight times, project estimation.
How fast do I need to drive to make up lost time? Less than you think — small speed increases over long distances add up disproportionately to fuel and risk.
Is mph easier than km/h? Just a different unit. mph × 1.609 = km/h.
If you only remember one thing from this post, make it that the inputs matter more than the calculator.