how fast is terminal velocity
Terminal velocity for a typical human in free fall through air is usually around 120 miles per hour (about 190–200 km/h) , though it can vary quite a bit depending on body position, weight, and air conditions.
What terminal velocity means
Terminal velocity is the maximum steady speed a falling object reaches when air resistance pushing up becomes equal to the force of gravity pulling down, so the object stops accelerating.
From that point on, it just keeps falling at a constant speed unless its shape or environment changes (for example, by opening a parachute).
How fast for humans?
For a person skydiving in a “belly‑to‑earth” (spread‑eagle) position, terminal velocity is usually quoted as roughly:
- 120 mph (about 190–200 km/h) in standard conditions.
If the skydiver tucks into a head‑down or streamlined dive, their effective surface area drops and terminal velocity can shoot up to over 400 km/h (about 250+ mph).
Factors that change the speed
- Body position and shape :
- Spread‑out (arms and legs out) → more drag → lower terminal velocity (~120 mph).
- Head‑first, streamlined dive → less drag → much higher terminal velocity.
- Weight and size :
Heavier people with similar shape tend to have a slightly higher terminal velocity because gravity pulls them down more strongly relative to their drag.
- Air density and altitude :
Thinner air at high altitude reduces drag, so terminal velocity is higher there; as a skydiver descends into denser air, their terminal speed slowly decreases.
Terminal velocity for other objects
Terminal velocity is different for every object. Some examples:
Object / situation| Typical terminal velocity (approx.)
---|---
Skydiver, belly‑to‑earth| 120–125 mph (190–200 km/h)379
Skydiver, head‑down dive| 250+ mph (400+ km/h)9
Typical raindrop| A few meters per second, much slower3
Light dust or oil‑mist drops| Extremely slow, “almost floating” speeds3
Why it matters in the real world
- Skydiving / BASE jumping : Knowing terminal velocity helps jumpers plan free‑fall time and deploy parachutes safely.
- Engineering & safety: Car‑crash models, building design, and even spacecraft‑re‑entry systems all deal with how objects behave near or at terminal velocity.
Information gathered from public forums or data available on the internet and portrayed here.