Vertical Jump Reach Calculator
Estimate vertical jump height from standing reach and jump reach; no performance grade.
Last updated · View algorithm, constants and default inputs (JSON)
About this calculator
Enter standing reach and highest jump reach measured using the same method. The difference is the estimated jump height; the calculator also expresses it relative to entered height and shows the gap to a 10 ft reach. This is a measurement aid, not a validated athletic ranking or training prescription.
Worked example
calculated with the default values below
Standing reach 88 in · Jump reach 112 in · Your height 70 in Estimated vertical jump 24.00 in · Estimated vertical jump 61.0 cm · Jump height as % of body height 34.3 % · Reach difference from a 10 ft rim 8.0 in
General background references
Disclaimer
These calculators give general mathematical results. They suit study, planning and estimation — verify anything that feeds a graded submission, a published figure or a financial commitment.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
J=max(0,R_j−R_s); J_cm=2.54J; P=100J/H; T=120−R_j
- R_s
- Standing reach (in)
- R_j
- Jump reach (in)
- H
- Entered body height (in)
- J
- Reach difference (in)
- P
- Jump difference as % of height
- T
- Difference from 10 ft reach (in)
The reach difference is a measurement estimate; T may be negative when jump reach exceeds 10 ft. No performance rating is assigned.
Frequently asked questions
How is jump height estimated?
Subtract standing reach from the highest jump reach, measured the same way. The result is a reach-difference estimate; body-height percentage and distance to a 10 ft reach are arithmetic comparisons, not a validated athletic rating. A negative gap means the measured jump reach is above 10 ft.