# Pressure Drop

Explore 3 online pressure drop tools for working with pressure drop data in your browser. Text inputs are not stored, and uploaded files are deleted after 6 hours.

> Canonical page: https://elysiatools.com/en/tags/pressure-drop

## Overview

Browse 3 pressure drop tools for working with pressure drop data through a browser-based interface, with no software installation required.

## Frequently asked questions

### What can I do with Pressure Drop tools?

You can work with pressure drop data using the tools available in this category through your browser.

### Do I need to install software?

No. Pressure Drop tools are available through a browser-based interface without software installation.

### How is my data handled?

Requests are submitted from your browser and processed on Elysia Tools servers. Text inputs are not stored, and uploaded files are automatically deleted after 6 hours.

## Tools

- [Minor (Local) Head Loss Calculator (h = K·v²/2g)](https://elysiatools.com/en/tools/minor-loss-calculator): Compute the minor (local) head loss and pressure drop for pipe fittings, valves and bends: h_m = K·v²/(2g), ΔP_m = K·ρ·v²/2. Ships typical K values for 14 common components (gate/globe/check/angle/ball valves, 90°/45° elbows, tees, sudden contraction/expansion, sharp entrance/exit); choose a preset or supply a custom K. Supports n identical fittings in series. Returns head loss (m, ft) and pressure drop (Pa, kPa, bar). Density in kg/m³, g/cm³ or lb/ft³.
- [Pipe Friction Factor Calculator (Colebrook-White / Haaland)](https://elysiatools.com/en/tools/pipe-friction-factor): Compute the Darcy friction factor: laminar closed-form f=64/Re for Re<2000, or iterative Colebrook-White solution for transitional/turbulent flow, with the explicit Haaland approximation always returned as a cross-check. Reports relative roughness ε/D, absolute roughness (m), diameter (m), flow regime (laminar/transitional/turbulent), effective method and iteration count. Roughness ε in m/mm/µm, diameter D in m/cm/mm.
- [Pipe Pressure Drop Calculator (Darcy-Weisbach)](https://elysiatools.com/en/tools/pipe-pressure-drop-darcy): Compute the Darcy-Weisbach major (friction) pressure drop in a straight pipe: ΔP = f·(L/D)·(ρ·v²/2) Pa and head loss h_f = f·(L/D)·v²/(2g) m. The user supplies the Darcy friction factor f (not the Fanning factor). Length in m/km/ft, diameter in m/cm/mm/inch, density in kg/m³/g/cm³/lb/ft³ — all normalised to SI internally. Returns ΔP in Pa, kPa and bar, and head loss in m and ft. Gravity defaults to 9.81 m/s² and may be overridden.

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