Compute the pressure generated by depth inside a standing liquid from density, depth and gravity using p = ρ·g·h, for pressure design of tanks, dams and diving equipment.
液体内部由深度产生的压强。
| Item | Formula | Source / Standard |
|---|---|---|
| Hydrostatic pressure | p = rho·g·h | hydrostatics |
| Gauge vs absolute | Absolute = gauge + atmospheric | pressure reference |
| Total force | F = p·A | hydrostatic force |
Constants used on this page and their authoritative sources, for verification and citation
| Constant | Value | Unit | Source |
|---|---|---|---|
| Standard acceleration of gravity g_n | 9.80665 | m·s⁻² | ISO 80000-3 / BIPM conventional value (exact) |
| Standard atmosphere atm | 101 325 | Pa | ISO 2533 / BIPM conventional value (exact) |
| Density of water (4 °C, maximum) | 999.972 | kg·m⁻³ | IAPWS reference; 1000 kg·m⁻³ in engineering practice |
Note: g_n is a conventional standard; actual gravity varies with latitude and altitude (≈9.780 at the equator, ≈9.832 at the poles) — use local gravity for precision work.