Free pond calculators
Lake Acreage Calculator
Turn your lake or pond size into acres, acre-feet and gallons for treatments and aeration.
What do you know about your lake?
Enter a number greater than 0.
Enter a number greater than 0.
Enter a number greater than 0.
Enter a number greater than 0.
The highlighted line shows what each box measures. Your numbers appear on the drawing.
Your results
Enter your lake’s size to see its acres, acre-feet and gallons.
How we calculate this
- 1 acre = 43,560 sq ft. 1 acre-foot = 1 acre of water 1 ft deep = about 325,851 US gallons.
- Oval:
π × (length ÷ 2) × (width ÷ 2). Irregular:max length × max width × 0.85, the same rule as our pond calculator. - Use the average depth, not the deepest point.
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Pond Treatment Dosage
Works out how much bacteria, barley, clarifier or dye to add, from the directions for the products we sell.
Find Aeration Size
Determines the appropriate size of an aeration system for pond based on dimensions.
Dock De-Icer Size
Finds the de-icer size that keeps your dock or boat lift ice-free, from the Kasco, Scott and Ice Eater sizing charts.
Find Pond Volume
Calculates pond volume in gallons based on pond size.
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