Waterstop Stock and Splice Quantity calculator.
Count stock lengths and overlapped splices independently for each run in your existing waterstop plan.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Count stock lengths and overlapped splices independently for each run in your existing waterstop plan. Stock lengths per run = 1 + ceil(max(run − stock, 0) / (stock − specified overlap)).
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Selected stock length
- 5 m
- Specified overlap consumed by each splice
- 0.2 m
- Measured run length
- 10 m
- Identical runs
- 2
Waterstop stock lengths: 6 lengths
Every run retains separate splice rounding. This arithmetic does not choose a waterstop type, splice method or watertight detail.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
All product dimensions, coverage, density, allowances and joining rules must come from your supplied plan or selected product. No building-code values are inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-05. Calculation and review policy.