Clubmaking tools
Measure a club
Calculate swingweight from total mass and balance point.
ModifyChange a build
Test head weight, butt weight, lead tape and playing-length changes.
ModifyPlace lead tape
See how the same grams change swingweight at the head, shaft, or butt.
BuildPlan a shaft
Work from raw length and manufacturer tip trim to a cut plan.
MeasureRead playing length
Measure on the 60° plane and see how a shorter club moves swingweight.
MatchMatch a set
Chart length, weight and swingweight progression and find outliers.
A workshop, not a fitting quiz
Club Builder Lab is a browser bench for DIY builders, gear nerds, hobby repairers, and small shops. You measure a finished club, or you assemble a model from components, then watch length, balance, and Lorythmic swingweight move on a schematic.
The calculators and the bench share one moment engine. A tape placement, a shaft cut, or a target swingweight can move onto the schematic without retyping the numbers.
Measure, then model
Weigh the club, find the balance point from the butt, and enter playing length. The engine reports first moment about the 14-inch fulcrum and maps it onto the Lorythmic scale. Scale and balance tolerances become a range, because a ±1 g postal scale and a ±1/8" balance read are not a dedicated swingweight scale.
A component stack — head, shaft, grip, ferrule, adapter, tip weight, lead tape, extension — is a model. Every part is a mass and a station from the butt. Predicted numbers wear a MODELLED badge. Measured numbers wear MEASURED. A set can mix both, and a single result never pretends a model is a scale reading.
What-if, reverse solver, set repair
Keep a baseline build, then fork a scenario: shorten half an inch, drop four grams of grip, add four grams at the head. The reverse solver looks for small legal moves toward a target swingweight. Set Match charts length, total weight, and swingweight, then flags clubs that leave your trend. One click opens the outlier on the bench.
Projects, the component library, and inventory stay in this browser. Export JSON or CSV when you want a copy.
FAQ
Is this a fitting recommendation tool?
No. It is a clubmaking workshop: measure, build, simulate, and match. It does not rank shafts for your swing.
Do I need an account?
No. Projects stay in this browser. Export JSON if you want a backup.
Are modelled numbers the same as a swingweight scale?
No. MEASURED results come from total weight and balance point. MODELLED results come from component first moments. Verify finished clubs on a scale.