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Rainfall Depth Calculator
Convert rain volume over a catchment into depth.
☔ Free Online Tool
⚡ Instant Results
📊 Clear Comparison
🔒 100% Free Tool
Depth
Compare Your Options And Get Clear Answers
Convert rain volume over a catchment into depth.
Rainfall Depth Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: Depth (mm) = litres / area (sq m).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Rainfall Quick Guide
Typical values for reference.
| Depth | Litres on 50 sq m | Inches | Level |
|---|---|---|---|
| 5 mm | 250 | 0.20 | Light |
| 10 mm | 500 | 0.39 | Moderate |
| 25 mm | 1250 | 0.98 | Heavy |
| 50 mm | 2500 | 1.97 | Intense |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Rainfall Depth Calculator FAQ
Answers to common questions about this calculator.
As millimetres, equal to litres per square metre.
It gives a quick estimate of rainfall depth from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.