套餐

速度、路程和时间计算器

已知其中两个量，用 速度 = 路程 ÷ 时间 求速度、路程或时间——单位可选 km/h、m/s 或 mph。

km/h 和 mph 以小时计，m/s 以秒计

结果

输入数值并点击“计算”查看结果。

公式

speed=distancetime\text{speed} = \frac{\text{distance}}{\text{time}}

How far you go in each unit of time.

distance=speed×time\text{distance} = \text{speed} \times \text{time}

Rearranged to find the distance.

time=distancespeed\text{time} = \frac{\text{distance}}{\text{speed}}

Rearranged to find the time.

如何使用此计算器

  1. Choose what you want to find and the units you are using.
  2. Enter the other two values in those units, then press Calculate.

例题

150 km in 2.5 hours

speed = distance ÷ time = 150 ÷ 2.5 = 60 km/h.

In metres per second: 60 × 1000 ÷ 3600 ≈ 16.666667 m/s.

常见问题

How do I remember the formula?

Use the triangle: D on top, S and T underneath. Cover the one you want — D = S × T, S = D ÷ T, T = D ÷ S.

How do I convert km/h to m/s?

Multiply by 5/18 (that is × 1000 ÷ 3600). To go back, multiply by 18/5.