Free · runs in your browser · no install
Vertical Jump Test
A free vertical jump test for your phone. Film a jump, step through it frame by frame, and mark take-off and landing: your height comes from your time in the air. Nothing to install, no account, and your video never leaves your device.
Best: a slow-motion video from your camera app. On iPhone, slow motion takes a few seconds to prepare after you pick it. Your video stays on this device. Nothing is uploaded.
Set up in 30 seconds
- 1Put the phone on the floor or at knee height, 2–3 m (7–10 ft) away, so your whole body and both feet are in the picture.
- 2Stand still, jump straight up as high as you can, and land on the same spot with straight legs.
- 3Then step through the video and mark two frames: take-off and landing.
How the vertical jump test works
- 01Put your phone on the floor or at knee height, 2–3 m (7–10 ft) away, so your whole body and both feet are in the picture.
- 02Press Record a jump, or film in slow motion with your camera app and press Upload a video.
- 03Stand still, then jump straight up as high as you can. Land on the same spot with your legs straight.
- 04Step through the video one frame at a time. Mark take-off, the first frame with both feet off the ground, and landing, the first frame a foot touches down.
- 05Read your height, your flight time and how precise the result is at your video's frame rate.
What a vertical jump test measures
A vertical jump test measures how high you can lift your body from a standing start. It's one of the most common tests of leg power in sport, and there are three versions you'll come across:
- The standing vertical jump, or countermovement jump: dip and jump straight up. This test times it from video, the way a jump mat does.
- The Sargent jump test, or jump and reach: mark your standing reach on a wall, jump and touch as high as you can. The difference is your vertical leap.
- The max vertical: jump and reach with a run-up, as at the NBA combine. It reads higher than a standing jump, so compare yours with averages measured the same way.
A vertical jump test at home
You need a phone, a few metres of floor and something to lean the phone against. There's no vertical jump app to install: the test runs in Safari or Chrome on your phone, or on a computer if you upload a video.
Film in slow motion if your phone can. At 240 fps each frame is about 4 ms, so your two marks are good to about half a centimetre; at 30 fps one frame is worth about 4 cm on a typical jump. How the test works has the details.
Questions
How do I do a vertical jump test at home?
Lean your phone on the floor 2–3 m away with your whole body in view, film one jump (slow motion if you can), then mark the frame you leave the ground and the frame you land. The page turns your time in the air into your height.
How accurate is it?
The test times your jump to one video frame. For a 30 cm (12 in) jump that is about ± 0.5 cm in 240 fps slow motion, ± 1 cm at 120 fps, ± 2 cm at 60 fps and ± 4 cm at 30 fps, and every result shows the band for your video. It uses flight time, the method jump mats and sports-science video tests use, so it relies on you landing the way you took off.
Does slow motion help?
Yes, a lot. Film in Slo-mo on iPhone (240 or 120 fps) or Slow motion on Android, then upload the video. More frames per second means each frame is a smaller slice of time, so your two marks are more precise. If the page can't tell your video's frame rate, it asks.
Is my video uploaded?
No. Your video is read inside your browser on this device, frame by frame. Nothing is sent to us or stored on a server.
Why might my result be too high?
Flight time grows if you tuck your knees or land on your heels with bent legs, because you stay in the air longer than you rose. Land with straight legs on the same spot you took off from, and mark the first frame a foot touches the ground.
Should I swing my arms?
Either works, but do the same every time: arm swing adds several centimetres. Hands on hips is the usual test protocol; the national survey behind our averages allowed arm swing.
Do I need a vertical jump app?
No. This vertical jump test runs in Safari or Chrome on iPhone and Android, and in any modern browser on a computer. There's nothing to install and no sign-up.