Gutter size calculator
Use our gutter size calculator to calculate accurate size and measurement values instantly.
Calculator
Estimate rainwater flow from roof catchment and rainfall intensity.
Formula: Flow (L/min) = roof area x rainfall(mm/h) x runoff coefficient / 60
What each field means
- Roof Area (m2): Enter a valid value for this field.
- Rainfall Intensity (mm/h): Enter a valid value for this field.
- Runoff Coefficient: Example: 0.9
Estimated Runoff (L/min)
Your result will appear here.
About Gutter size calculator
The Gutter size calculator helps you estimate general size and measurement values quickly using consistent assumptions and practical calculation rules.
Formula Explanation
Flow (L/min) = roof area x rainfall(mm/h) x runoff coefficient / 60
Inputs You Need
- Required measurement values relevant to this calculator
- Unit selection: Roof Area (m2), Rainfall Intensity (mm/h), Runoff Coefficient
- Optional tolerance, safety, or scenario values if applicable
Step-by-Step Usage
- Enter your known values in the calculator fields.
- Select units and options that match your scenario.
- Click Calculate to generate your output.
- Copy, save, or share the result for later reference.
Example
Run the tool with realistic values from your use case and compare the output against expected ranges for general size and measurement calculations.
Frequently Asked Questions
Is this Gutter size calculator accurate?
Yes, when correct inputs and units are provided.
Which units does this calculator support?
This tool is optimized for Roof Area (m2), Rainfall Intensity (mm/h), Runoff Coefficient.
Can I use this calculator on mobile?
Yes, the form is optimized for touch inputs and smaller screens.