The Vertical Jump Calculator is a free online tool that measures how high you jump and how much peak power that jump suggests, using your standing reach, your jump touch height, and your body mass. It runs fully in your browser, needs no sign-up, and gives you a clear result in seconds, so you can use it at the track, in the gym, or at home without installing anything or sharing personal data.
This tool works from simple numbers you already know or can measure in one session. You enter your standing reach in centimetres, the highest point you touch in a jump in centimetres, and your body mass in kilograms. The tool then applies a standard formula to those numbers, so the result follows the same maths every time and two people who enter the same inputs always get the same output.
Your result shows your jump height in centimetres, which is touch height minus standing reach, plus an estimated peak power in watts from a standard jump power formula. Read the main number first, then look at the extra figures, because they often explain the result better than a single score alone. A result that looks odd usually points to a typing error or a unit mix-up, so check your inputs before you trust an extreme value.
Here is a worked example to make the maths concrete. In this example, a standing reach of 230 centimetres and a jump touch of 280 centimetres gives a 50-centimetre jump, and at 80 kilograms that suggests peak power near 4,604 watts. Try the same numbers in the tool yourself, then change one input at a time, and watch how the result moves, because that habit teaches you far more than reading a formula on its own.
How should you read the result in practice? In general, jump heights near 30 centimetres are typical for many adults, heights above 50 centimetres are strong, and higher power numbers usually follow from both a bigger jump and a larger body mass. Use the result to compare your own tests over time, not to judge yourself against strangers online, because age, sport, training history, and test conditions all change what a good number looks like for you.
To get the most from this tool, follow a few simple habits. First, measure reach flat-footed with one arm up, chalk your fingers, jump from both feet, and take your best of three jumps so one slip does not define your result. Second, test under similar conditions each time, with the same warm-up and the same course or equipment, so changes in the number reflect changes in your fitness rather than changes in the test itself.
Watch out for common mistakes, because small errors can move the result a lot. The most frequent problem is measuring reach on tiptoes, or counting a touch made by stretching sideways, because both tricks inflate the jump height without any real gain in jumping ability. A second common problem is entering numbers in the wrong units, for example minutes instead of seconds, or pounds instead of kilograms, so double-check the unit labels on every field.
Finally, keep the limits of this tool in mind. In short, the power figure is an estimate from a formula, not a force-plate measurement, so use it to track your own progress over time rather than to compare yourself with athletes tested on laboratory equipment. Used with that care, this free tool becomes a practical part of your training routine, giving you honest numbers you can track week after week without cost, accounts, or complicated software.
If you test regularly, keep a simple log with the date, your inputs, and your result, because a short written record shows progress far better than memory alone. Review the log once a month, look for slow steady improvement rather than daily jumps, and adjust your training only when a pattern holds for several weeks, not after a single unusual test.
Version en espanol: Calculadora de Salto Vertical – Solo Estimación Educativa