Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Single linear floor slope across the full rectangular plan. Steps, ledges and curved ends excluded.
Example Calculation
- Length: 10 m
- Width: 4 m
- Shallow water depth: 1 m
- Deep water depth: 2 m
Length = 10 m; Width = 4 m; Shallow water depth = 1 m; Deep water depth = 2 m. Primary result: 60.
Frequently asked questions
How do I use this calculator?
Enter length, width, shallow water depth, deep water depth. The result updates automatically. Use Reset to restore the example values.
What method does it use?
V=length ×width ×(shallow+deep)/2.. Single linear floor slope across the full rectangular plan. Steps, ledges and curved ends excluded.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.