About

In materials science and high-vacuum physics, pressure readings often span several orders of magnitude. While legacy gauges may output millimeters of mercury (mmHg), stress analysis and structural engineering data are almost exclusively calculated in Megapascals (MPa). Converting between these requires handling very small decimal values, where a misplaced zero can lead to catastrophic structural calculations.

This tool transforms mmHg inputs into MPa with a focus on decimal precision. Since 1 mmHg is roughly 0.000133 MPa, standard calculator displays often truncate the necessary significant digits. This converter defaults to high-precision formatting or scientific notation to ensure data integrity for industrial applications.

Formulas

The conversion involves dividing the Pascal equivalent by one million.

P_MPa = P_mmHg × 0.000133322

Or using powers of ten:

P_MPa = P_mmHg × 1.33322 × 10^-4

Reference Data

Pressure (mmHg)	Pressure (MPa)	Comparison
1	1.33 × 10^-4	Near Vacuum
750	0.100	Approx 1 Bar
760	0.1013	Standard Atmosphere
7500	1.0	~10 Atmospheres
10000	1.333	Industrial Hydraulic Low-end
100000	13.33	Deep Sea Pressure (~1.3km)

Frequently Asked Questions

MPa (Megapascal) is typically used for high-pressure systems like hydraulics, material stress (Young's modulus), and concrete strength. kPa is used for atmospheric and weather data.

Yes. The input parser accepts both dots (1.5) and commas (1,5) to accommodate international industrial standards.

1 MPa is exactly equal to 10 Bar. This makes mental estimation relatively easy if you are familiar with Bar measurements.

Yes. The scientific notation output is specifically designed to display the tiny MPa values resulting from low mmHg vacuum readings.