What Is This Tool?
This converter tool allows users to convert measurements from acre-foot, a customary volume unit, to acre-foot (US survey), a closely related unit defined using the US survey foot. Both units are used for quantifying large volumes of water in various water management contexts.
How to Use This Tool?
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Enter the volume value in acre-foot [ac*ft].
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Select the conversion to acre-foot (US survey).
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View the converted volume calculated using the exact conversion factor.
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Use the result for water resource or irrigation volume planning.
Key Features
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Converts volume measurements between acre-foot and acre-foot (US survey).
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Includes accurate conversion based on the defined relationship between the two units.
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Useful for water resource management, irrigation planning, and municipal water supply contexts.
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Browser-based and easy to use for quick volume conversions.
Examples
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10 acre-foot [ac*ft] converts to 9.99994 acre-foot (US survey).
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100 acre-foot [ac*ft] converts to 99.9994 acre-foot (US survey).
Common Use Cases
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Reporting reservoir and lake storage capacities and water releases.
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Allocating and accounting for irrigation water deliveries in agriculture.
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Expressing annual municipal or regional water supply amounts and water rights.
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Precise measurement of water stored in reservoirs and dams.
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Planning and managing municipal and regional water consumption volumes.
Tips & Best Practices
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Use the converter when exact distinctions between standard and US survey foot definitions matter.
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Apply the conversion in legal, engineering, or scientific contexts requiring precision.
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Be aware that for many practical purposes the units are nearly interchangeable.
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Carefully verify unit definitions to prevent cumulative volume errors in large-scale water accounting.
Limitations
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The difference between acre-foot and acre-foot (US survey) is minimal and often negligible for general use.
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Precise applications must use the exact conversion to avoid errors in water volume calculations.
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Misuse of foot definitions (standard vs. US survey) can cause inaccuracies over large water allocations.
Frequently Asked Questions
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What is an acre-foot?
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An acre-foot is a customary volume unit representing the quantity of water covering one acre of surface area to a depth of one foot, equal to 43,560 cubic feet.
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How does an acre-foot differ from an acre-foot (US survey)?
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An acre-foot (US survey) uses the US survey foot definition and equals 43,560 US survey cubic feet, making it slightly different but very close to the standard acre-foot.
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When should I use this converter tool?
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Use this tool when distinguishing between acre-foot and acre-foot (US survey) is necessary for precise water management, irrigation planning, or legal documentation.
Key Terminology
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Acre-foot [ac*ft]
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A customary unit of volume equal to water covering one acre to a depth of one foot, used in water resource and irrigation contexts.
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Acre-foot (US survey)
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A volume unit based on the US survey foot, representing water covering one acre to a depth of one US survey foot.
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Conversion Rate
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The specific factor relating acre-foot to acre-foot (US survey), here equal to 0.999994.