- Gradient1 : 40
- Drop per metre25mm/m
- Total drop over 0m0mm
- Total drop0m
- End invert (relative to start)0mm below datum
// Estimate only — verify before quoting
Drainage: Pipe Gradient & Drop Calculator
Foul or surface water pipe runs. Calculates total drop and invert level over the run for any UK gradient.
Frequently asked questions
How do I use the drainage: pipe gradient & drop calculator?
Enter your measurements and options into the Drainage: Pipe Gradient & Drop above and the result updates instantly. Foul or surface water pipe runs. Calculates total drop and invert level over the run for any UK gradient.
Is the drainage: pipe gradient & drop calculator free to use?
Yes — every TradesMate calculator is free to use with no sign-up. Save quotes and use the full estimator with a free trial.
Are the results accurate enough to quote from?
The figures are reliable estimates based on standard UK trade practice. Always allow for wastage and verify against current material prices before quoting a customer.
Related calculators
Turn your numbers into a winning quote
Use the full TradesMate estimator to build branded, professional quotes in minutes.
Open the estimator →