- Fall ratio1 : 60
- Fall per metre16.7mm/m
- Total drop over 0m0mm
- Total drop0cm
- Equivalent in coursing bricks (65mm)0courses
// Estimate only — verify before quoting
Drainage: Patio / Surface Fall Calculator
Calculate the correct fall for porcelain, sandstone, concrete or tarmac surfaces. Includes mm per metre and total drop across the run.
Frequently asked questions
How do I use the drainage: patio / surface fall calculator?
Enter your measurements and options into the Drainage: Patio / Surface Fall above and the result updates instantly. Calculate the correct fall for porcelain, sandstone, concrete or tarmac surfaces. Includes mm per metre and total drop across the run.
Is the drainage: patio / surface fall 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.
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