Watering Can Calculator — How Many Cans for Your Garden
Calculate how many watering cans you need for your garden beds.
10mm is a good standard soak
How We Calculate This
Total water = Area × Water depth (in litres: 1mm on 1m² = 1 litre, so 10mm = 10L/m²).
Cans needed = Total litres ÷ Can size.
Frequently Asked Questions
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Last updated: February 2026
All calculations are estimates based on standard gardening guidelines. Results may vary with soil conditions, climate, and plant varieties.