Water Pressure at Depth Calculator
Absolute and gauge pressure at depth in fresh or sea water — for tanks, dams and diving.
Pressure depends only on depth, not on tank shape or volume — the hydrostatic paradox. Every 10 m of fresh water ≈ 1 atm extra.
Formula
Water Pressure at Depth Calculator is a free water pressure at depth for process, mechanical and water engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Water Pressure at Depth Calculator
Absolute and gauge pressure at depth in fresh or sea water — for tanks, dams and diving. The calculation implements P_gauge = ρ·g·h; P_abs = P_gauge + P_atm (Çengel & Cimbala, Fluid Mechanics, §3-2). Pressure depends only on depth, not on tank shape or volume — the hydrostatic paradox. Every 10 m of fresh water ≈ 1 atm extra.
How to use Water Pressure at Depth Calculator
- 1Enter Depth below surface in m.
- 2Enter Water density in kg/m³ (Fresh 998 · sea 1025).
- 3Read Gauge pressure, Absolute pressure instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Water Pressure at Depth Calculator?
- ✓Implements the standard formula — P_gauge = ρ·g·h; P_abs = P_gauge + P_atm
- ✓Reference cited on-page: Çengel & Cimbala, Fluid Mechanics, §3-2
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Water Pressure at Depth Calculator use?+
It computes P_gauge = ρ·g·h; P_abs = P_gauge + P_atm, per Çengel & Cimbala, Fluid Mechanics, §3-2. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Pressure depends only on depth, not on tank shape or volume — the hydrostatic paradox. Every 10 m of fresh water ≈ 1 atm extra.
Does this work for any fluid?+
Yes — density and viscosity are inputs (with common fluids suggested in the field hints), so the same physics applies to water, oils, gases and process fluids. Compute always runs in SI internally, so unit mix-ups can't corrupt the result.
Is the Water Pressure at Depth Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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