# Pressure Calculator & Converter (P=F/A, Pa/kPa/bar/atm/psi) Solve pressure, force, or area from P=F/A, and convert between Pa, kPa, MPa, bar, atm, psi, Torr, inHg, kgf/cm² > Canonical page: https://elysiatools.com/en/tools/pressure-conversion - **Category:** Math & Numbers - **Keywords:** pressure, force, area, pascal, kilopascal, bar, atmosphere, psi, torr, mmhg, pressure conversion, P=F/A, physics, mechanics ## Overview Pressure is force per unit area. Mode 1 — Formula P = F/A (three-way solver): - Pressure: P = F / A - Force: F = P · A - Area: A = F / P Mode 2 — Unit converter across Pa, kPa, MPa, hPa, bar, atm, psi, Torr (mmHg), inHg, kgf/cm² (at). Reference: 1 atm = 101325 Pa = 760 Torr = 14.696 psi. ## Inputs - **Mode** (select) - **Solve For** (select) - **Pressure (P, Pa)** (number): leave blank when solving for pressure - **Force (F, N)** (number): leave blank when solving for force - **Area (A, m²)** (number): leave blank when solving for area - **Value to Convert** (number): e.g. 1 (in the From Unit) - **From Unit** (select) ## When to use - When calculating mechanical pressure, force, or contact area using the fundamental physics formula P = F/A. - When converting pressure readings between metric units like Pascals and imperial units like PSI or inches of mercury. - When verifying laboratory measurements or engineering specifications that use different regional pressure standards. ## How it works - Select the operation mode: either the P = F/A formula solver or the multi-unit pressure converter. - For the formula solver, choose the target variable to calculate (pressure, force, or area) and input the two known values. - For the converter, enter the numeric value and select the source unit from the dropdown menu. - View the calculated result or the complete list of equivalent values across all supported pressure units instantly. ## Use cases - Determining the pressure exerted by heavy machinery on a concrete foundation to ensure structural safety. - Converting tire pressure specifications from PSI to bar for imported automotive maintenance. - Calculating the required hydraulic cylinder force needed to achieve a target pressure over a specific piston area. ## Frequently asked questions ### What units does the converter support? It supports Pascals (Pa), Kilopascals (kPa), Megapascals (MPa), Hectopascals (hPa), Bar, Atmospheres (atm), PSI, Torr (mmHg), Inches of Mercury (inHg), and Kilogram-force/cm² (at). ### What formula is used for the calculations? The tool uses the standard physical formula P = F/A, where pressure equals force divided by area. ### What units must be used for the formula solver? The formula solver uses standard SI units: Pascals (Pa) for pressure, Newtons (N) for force, and square meters (m²) for area. ### Can I calculate the required surface area if I know the force and pressure? Yes, select 'Area (A)' in the 'Solve For' dropdown and input the force and pressure values. ### Is there a limit to the values I can convert? 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