Vertical Jump Speed Calculator

Measure takeoff velocity from jump height, hang time, or reach data. Review force and power clearly. Track training progress with clear visuals daily now.

Calculator Inputs

seconds

Add body mass and push-off distance for advanced estimates like force, acceleration, power, and load. Without them, the tool still computes height and speed.

Formula Used

1) From jump height: v = √(2gh)

2) From flight time: v = gt / 2 and h = gt² / 8

3) From reach data: h = touch reach − standing reach

4) Flight time from takeoff speed: t = 2v / g

5) Time to apex: t_apex = v / g

6) Average acceleration during push-off: a = v² / (2s)

7) Average ground force estimate: F = m(g + a)

8) Takeoff kinetic energy: KE = 0.5mv²

9) Average power estimate: P = KE / t_push

These advanced force and power outputs assume constant acceleration through the push-off distance, so they are useful estimates rather than lab-grade measurements.

How to Use This Calculator

  1. Select an input mode: jump height, flight time, or reach difference.
  2. Enter athlete details if you want labeled exports and easier tracking.
  3. Add body mass for kinetic energy and impulse estimates.
  4. Add push-off distance for force, acceleration, power, and load estimates.
  5. Click the calculate button to show the result above the form.
  6. Review the metrics grid, advanced estimate table, and Plotly graph.
  7. Use the CSV or PDF buttons to export the result summary.
  8. Repeat with new test values to compare sessions or athletes.

Example Data Table

Athlete Input Mode Main Input Mass Push-Off Distance Jump Height Takeoff Speed Flight Time Avg Power
Guard A Jump Height 55 cm 78 kg 0.45 m 55.0 cm 3.284 m/s 0.670 s 1535.9 W
Spiker B Flight Time 0.58 s 65 kg 0.40 m 41.2 cm 2.844 m/s 0.580 s 934.9 W
Forward C Reach Data 90 in to 111 in 90 kg 0.50 m 53.3 cm 3.235 m/s 0.660 s 1524.1 W

FAQs

1) What is vertical jump speed?

It is the estimated takeoff velocity needed to reach a measured jump height. Higher takeoff speed usually reflects stronger explosive lower-body performance.

2) Which input mode should I use?

Use jump height when you already know the jump result. Use flight time when hang time was measured. Use reach mode when you recorded standing reach and highest touch.

3) Why should I enter body mass?

Body mass lets the calculator estimate kinetic energy, impulse, and relative power. Without mass, it still calculates jump height, takeoff speed, and flight time.

4) What does push-off distance mean?

Push-off distance is the approximate center-of-mass travel during takeoff. It helps estimate average force, acceleration, and push time. Many athletes fall roughly between 0.30 and 0.55 meters.

5) Is the force output exact?

No. It is a simplified average estimate based on constant acceleration through the push phase. Force-plate testing gives more precise ground reaction measurements.

6) Can I compare athletes with this tool?

Yes. Use the same testing method, jump style, measurement device, and unit settings. Consistent testing conditions make comparisons much more meaningful.

7) Does arm swing affect the result?

Yes. Arm swing can increase jump height and estimated takeoff speed. For progress tracking, keep your jump style consistent across all tests.

8) What counts as a good vertical jump?

It depends on sex, sport, age, position, and testing setup. The performance band here is a practical guide, not a medical, coaching, or scouting standard.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.