Reconcile one completed six-roll USGA Stimpmeter-style record. Validate opposite-direction method limits and reproduce the combined ball-roll distance.
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A quick decision brief for this specific tool
Inputs that matter
One de-identified completed Stimpmeter-style record and basis; named device/notch method, same marked-line conditions, accepted-roll and independent-summary sources; selected feet/inches unit; exactly three completed rolls in each direction; and an independent normalized combined reading
Output to expect
Preserved provenance, applicable 1X/2X limits, raw series spreads and directional difference, normalized directional means, reproduced combined ball-roll distance, independent reading, and signed difference
How it works
Validate both three-roll series against the official raw method limits, average each direction, multiply the alternate 2X directional means by two, average the normalized opposite directions, then compare the independently prepared same-record summary
Confirm both directions use the same marked line, timing, surface state, device, notch and accepted-record process. The worksheet cannot observe release technique, ball alignment, representative location or instrument condition.
Treat the result as ball-roll distance and the signed difference as arithmetic review only. Green quality, targets, maintenance, tournament setup, playability and player strategy require representative evidence and responsible professional judgment.
Choose your path
Built around the job you need to finish
Validate and reproduce one completed, source-labelled USGA Stimpmeter-style record with three accepted rolls in each direction, the recorded 1X or 2X method and an independent same-record combined distance.
Superintendent or technician checking a completed measurement
Catch a copied roll, unit, notch or arithmetic mismatch without turning one location into a maintenance prescription.
Preserve the device/method, marked line and conditions, accepted-roll source and independent summary; enter both three-roll series and compare the reproduced combined distance.
Sees method-limit checks, normalized directional means and a signed same-record difference while field validity and maintenance decisions remain with the responsible process.
Club or committee volunteer reviewing a source record
Understand why a one-direction average or an unidentified 1X/2X number cannot be accepted as the completed record.
Load the standard-method example, trigger a malformed or out-of-limit record, then recover with the exact opposite-direction record and save deliberately.
Can distinguish arithmetic agreement from instrument, technique, representativeness, competition and green-quality approval.
Coach or student learning the measurement method
Learn the bidirectional method without treating ball-roll distance as velocity, a universal target or player advice.
Compare 1X and 2X completed exercises, inspect raw spreads, directional difference, multiplier and four calculation steps, then export the explicit boundaries.
Learners can reproduce the method arithmetic and explain why faster is not necessarily better and why one reading cannot diagnose performance.
Authoritative checks for this tool
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
Copy the completed record without silently replacing rolls. Keep the exact notch, distance unit, same marked line, surface state, timing, accepted-roll source, repeats, and independent summary attached to the numbers.
Record = device and notch + marked line and conditions + two accepted three-roll series
Validate the USGA Method Limits
The standard 1X method accepts three-ball series spanning no more than 8 inches and opposite-direction means differing no more than 18 inches. The limited-area 2X method uses 4-inch and 9-inch raw limits, then doubles each directional mean.
1X: each series spread ≤ 8 in and direction means differ ≤ 18 in; 2X: ≤ 4 in and ≤ 9 in
Reproduce and Compare
Compare the reproduced combined distance with a separately prepared summary for the same six rolls and method basis. The signed difference is an arithmetic review flag, not proof of record validity or a green-performance decision.
Combined distance = (normalized direction A mean + normalized direction B mean) ÷ 2
Updated: August 2026
Example Scenarios
A supervised record contains three rolls averaging 10.1 feet in one direction and 10.0 feet in the other. The worksheet reproduces the 10.05-foot combined ball-roll distance and compares it with the source summary.
A completed record identifies the alternate half-length notch. The worksheet checks the stricter raw spread and directional limits, doubles the two raw directional means, and then averages them.
If either three-roll spread or the opposite-direction mean difference exceeds the recorded method limit, calculation stops and routes the record back to the responsible measurement process instead of manufacturing a result.
FAQ
No. A Stimpmeter result is the distance a ball rolls under the recorded method. This worksheet reports and reconciles that ball-roll distance; it does not calculate velocity.
The standard 1X method uses the full-length notch. The alternate 2X method is for limited areas, uses stricter raw acceptance limits, and doubles the measured directional distances before combining them.
The USGA method averages measurements along the same line in opposite directions. That method step limits directional influence and cannot be replaced by averaging three rolls in only one direction.
No. A larger number is not automatically better, and one location or time cannot establish overall green quality. Interpretation depends on representative sampling, conditions, course context, playability, and responsible professional judgment.
No. It only validates and reproduces a completed arithmetic record. Maintenance, competition setup, turf response, measurement frequency, hole locations, and player strategy remain outside its scope.
About Putting Green Speed Calculator
This worksheet reproduces one completed, source-labelled Stimpmeter roll record: three accepted rolls along a marked line, three in the opposite direction, the recorded 1X or 2X notch, and an independently prepared combined reading. It reports ball-roll distance rather than physical speed and does not certify technique, rank green quality, choose a target, or prescribe maintenance or play.
