Pressure 0 8 MPa. Calculator for converting pressure in bar to MPa, kgf and psi. natural gems

29.08.2021

The unit of pressure in SI-pascal (Russian designation: Pa; international: Pa) \u003d N / m 2
Conversion table for pressure units. Pa; MPa; bar; atm; mmHg.; mm w.st.; m w.st., kg / cm 2; psf; psi inches Hg; in.st. below
Note, there are 2 tables and a list. Here's another useful link:

Conversion table for pressure units. Pa; MPa; bar; atm; mmHg.; mm w.st.; m w.st., kg / cm 2; psf; psi inches Hg; in.st. The ratio of pressure units.

	In units:
	Pa (N / m 2)	MPa	bar	atmosphere	mmHg Art.	mm w.st.	m w.st.	kgf / cm 2
	Should be multiplied by:
Pa (N / m 2) - pascal, SI unit of pressure	1	1*10 -6	10 -5	9.87*10 -6	0.0075	0.1	10 -4	1.02*10 -5
MPa, megapascal	1*10 6	1	10	9.87	7.5*10 3	10 5	10 2	10.2
bar	10 5	10 -1	1	0.987	750	1.0197*10 4	10.197	1.0197
atm, atmosphere	1.01*10 5	1.01* 10 -1	1.013	1	759.9	10332	10.332	1.03
mmHg Art., mmHg	133.3	133.3*10 -6	1.33*10 -3	1.32*10 -3	1	13.3	0.013	1.36*10 -3
mm w.st., mm water column	10	10 -5	0.000097	9.87*10 -5	0.075	1	0.001	1.02*10 -4
m w.st., meter of water column	10 4	10 -2	0.097	9.87*10 -2	75	1000	1	0.102
kgf / cm 2, kilogram-force per square centimeter	9.8*10 4	9.8*10 -2	0.98	0.97	735	10000	10	1
	47.8	4.78*10 -5	4.78*10 -4	4.72*10 -4	0.36	4.78	4.78 10 -3	4.88*10 -4
	6894.76	6.89476*10 -3	0.069	0.068	51.7	689.7	0.690	0.07
Inches Hg / inches Hg	3377	3.377*10 -3	0.0338	0.033	25.33	337.7	0.337	0.034
inches w.st. / inchesH2O	248.8	2.488*10 -2	2.49*10 -3	2.46*10 -3	1.87	24.88	0.0249	0.0025

Conversion table for pressure units. Pa; MPa; bar; atm; mmHg.; mm w.st.; m w.st., kg / cm 2; psf; psi inches Hg; in.st.

To convert pressure in units:	In units:
	pounds per sq. pound square feet (psf)	pounds per sq. inch / pound square inches (psi)	Inches Hg / inches Hg	inches w.st. / inchesH2O
	Should be multiplied by:
Pa (N / m 2) - SI unit of pressure	0.021	1.450326*10 -4	2.96*10 -4	4.02*10 -3
MPa	2.1*10 4	1.450326*10 2	2.96*10 2	4.02*10 3
bar	2090	14.50	29.61	402
atm	2117.5	14.69	29.92	407
mmHg Art.	2.79	0.019	0.039	0.54
mm w.st.	0.209	1.45*10 -3	2.96*10 -3	0.04
m w.st.	209	1.45	2.96	40.2
kgf / cm 2	2049	14.21	29.03	394
pounds per sq. pound square feet (psf)	1	0.0069	0.014	0.19
pounds per sq. inch / pound square inches (psi)	144	1	2.04	27.7
Inches Hg / inches Hg	70.6	0.49	1	13.57
inches w.st. / inchesH2O	5.2	0.036	0.074	1

Detailed list of pressure units, one pascal is:

1 Pa (N / m 2) \u003d 0.0000102 Atmosphere "metric" / Atmosphere (metric)
1 Pa (N/m 2) = 0.0000099 Atmosphere (standard) = Standard atmosphere
1 Pa (N / m 2) \u003d 0.00001 Bar / Bar
1 Pa (N / m 2) \u003d 10 Barad / Barad
1 Pa (N / m 2) \u003d 0.0007501 Centimeters of mercury. Art. (0°C)
1 Pa (N / m 2) \u003d 0.0101974 Centimeters in. Art. (4°C)
1 Pa (N / m 2) \u003d 10 dyne / square centimeter
1 Pa (N/m 2) = 0.0003346 Foot of water / Foot of water (4 °C)
1 Pa (N / m 2) \u003d 10 -9 Gigapascals
1 Pa (N / m 2) \u003d 0.01
1 Pa (N / m 2) \u003d 0.0002953 Dumov Hg / Inch of mercury (0 °C)
1 Pa (N / m 2) \u003d 0.0002961 Inches of mercury. Art. / Inch of mercury (15.56 °C)
1 Pa (N / m 2) \u003d 0.0040186 Dumov w.st. / Inch of water (15.56 °C)
1 Pa (N / m 2) \u003d 0.0040147 Dumov w.st. / Inch of water (4 °C)
1 Pa (N / m 2) \u003d 0.0000102 kgf / cm 2 / Kilogram force / centimetre 2
1 Pa (N / m 2) \u003d 0.0010197 kgf / dm 2 / Kilogram force / decimetre 2
1 Pa (N / m 2) \u003d 0.101972 kgf / m 2 / Kilogram force / meter 2
1 Pa (N / m 2) \u003d 10 -7 kgf / mm 2 / Kilogram force / millimeter 2
1 Pa (N / m 2) \u003d 10 -3 kPa
1 Pa (N / m 2) \u003d 10 -7 Kilopound force / square inch / Kilopound force / square inch
1 Pa (N / m 2) \u003d 10 -6 MPa
1 Pa (N / m 2) \u003d 0.000102 Meters w.st. / Meter of water (4 °C)
1 Pa (N / m 2) \u003d 10 Microbar / Microbar (barye, barrie)
1 Pa (N / m 2) \u003d 7.50062 Microns of mercury / Micron of mercury (millitorr)
1 Pa (N / m 2) \u003d 0.01 Milibar / Millibar
1 Pa (N/m 2) = 0.0075006 (0 °C)
1 Pa (N / m 2) \u003d 0.10207 Millimeters of w.st. / Millimeter of water (15.56 °C)
1 Pa (N / m 2) \u003d 0.10197 Millimeters w.st. / Millimeter of water (4 °C)
1 Pa (N / m 2) \u003d 7.5006 Millitorr / Millitorr
1 Pa (N/m2) = 1N/m2 / Newton/square meter
1 Pa (N / m 2) \u003d 32.1507 Daily ounces / sq. inch / Ounce force (avdp)/square inch
1 Pa (N / m 2) \u003d 0.0208854 Pounds of force per sq. foot / Pound force/square foot
1 Pa (N / m 2) \u003d 0.000145 Pounds of force per sq. inch / Pound force/square inch
1 Pa (N / m 2) \u003d 0.671969 Poundals per sq. foot / Poundal/square foot
1 Pa (N / m 2) \u003d 0.0046665 Poundals per sq. inch / Poundal/square inch
1 Pa (N / m 2) \u003d 0.0000093 Long tons per sq. foot / Ton (long)/foot 2
1 Pa (N / m 2) \u003d 10 -7 Long tons per sq. inch / Ton(long)/inch 2
1 Pa (N / m 2) \u003d 0.0000104 Short tons per sq. foot / Ton (short)/foot 2
1 Pa (N / m 2) \u003d 10 -7 Tons per sq. inch / Ton/inch 2
1 Pa (N / m 2) \u003d 0.0075006 Torr / Torr

pressure in pascals and atmospheres, convert pressure to pascals
atmospheric pressure is equal to XXX mm Hg. express it in pascals
gas pressure units - translation
liquid pressure units - translation

It is quite easy for an uninitiated person to get confused in the abundance of pressure units that exist today, exacerbated by the use of relative and absolute scales. Therefore, we considered it necessary to give here, in addition to the table of correspondences, several definitions and practical advice, which, in our opinion, should help an inexperienced customer to correctly determine the choice of the pump or compressor he needs.

First of all, let's deal with absolute and relative pressure.
Absolute pressure is the pressure measured relative to absolute zero pressure, or, in other words, absolute vacuum.
Relative pressure (in compressor technology, excess) is the pressure measured relative to the earth's atmosphere.

That is, if we use kgf / cm² (technical atmospheres) as the unit of measurement, then absolute vacuum will correspond to zero on the absolute scale and minus one on the relative scale, while atmospheric pressure will correspond to one on the absolute scale and zero on the relative scale. For compressors, everything is simpler - the excess pressure will always be 1 atmosphere less than the absolute one.

The values of the maximum residual pressures of pumps on our website are given for the most part in absolute millibars, since it is this pressure unit that is most widely used among Western manufacturers of vacuum equipment. But since in the territory former USSR very often Bourdon tubes are used as vacuum gauges, showing the relative pressure in technical atmospheres (at. or kgf / cm²), most often our customers are faced with the need to convert relative technical atmospheres into absolute millibars and vice versa. To do this, use the formula:

To convert millibars to Torr (mm Hg) or Pascals, remember the ratio:

1 millibar=100Pa=0.75 mm. rt. Art.

Table of relationships between the main units of pressure measurement:

Unit	Translate to	Coefficient
	bar	0,980665
1 kilogram force per centimeter 2 (kgf/cm 2)	MPa	0,0980665
1 kilogram force per centimeter 2 (kgf/cm 2)	kPa	98,0665
1 kilogram force per centimeter 2 (kgf/cm 2)	PSI	14,22334
1 psi	kgf/cm2	0,07030696
1 psi	bar	0,06894757
1 bar	PSI	14,50377
1 psi	MPa	0,006894757
1 megapascal (MPa)	PSI	145,035
1 kilopascal (kPa)	bar	0,01
1 bar	kPa	100
1 megapascal (MPa)	bar	10
1 bar	MPa	0,1
	MPa	0.0980665
1 technical atmosphere (atm)	bar	0,980665
1 megapascal (MPa)	atm	9,869233

PSI compliance with metric pressure units

*values have been rounded for practical purposes

PSI Pound per inch 2	kPa Kilopascal	MPa Megapascal	bar Bar
10	68,9	0,07	0,7
20	137,9	0,14	1,4
30	206,8	0,21	2,1
40	275,8	0,28	2,8
50	344,7	0,34	3,4
60	413,7	0,41	4,1
70	482,6	0,48	4,8
80	551,6	0,55	5,5
90	620,5	0,62	6,2
100	689	0,7	6,9
200	1,379	1,4	13,8
300	2,068	2,1	20,7
400	2,758	2,8	27,6
500	3,447	3,4	34,5
600	4,137	4,1	41,4
700	4,826	4,8	48,3
800	5,516	5,5	55,2
900	6,205	6,2	62,1
1"000	6,895	6,9	68,9
2"000	13,790	13,8	137,9
3"000	20,684	20,7	206,8
4"000	27,579	27,6	275,8
5"000	34,474	34,5	344,7
6"000	41,369	41,4	413,7
7"000	48,263	48,3	482,6
8"000	55,158	55,2	551,6
9"000	62,053	62,1	620,5
10"000	68,948	68,9	689
20"000	137,895	137,9	1,379
30"000	206,843	206,8	2,068
40"000	275,790	275,8	2,758

Performance unit ratio table:

	m³/hour	m³/min	l/min	l/s	CFM
m³/hour	1	1.667*10 -2	16.667	0.278	0.588
m³/min	60	1	103	16.6667	35.29
l/min	0.06	1*10 -3	1	1.667*10 -2	3.5*10 -2
l/s	3.6	0.06	60	1	2.12
CFM	1.7	2.8*10 -2	28.57	0.47	1

(Pa) if it is given in megapascals (mPa). As you know, there are 1,000,000 pascals in one megapascal. Let's say you need to convert to 3 megapascals, this will be: 3 MPa * 1,000,000 = 3,000,000 Pa.

Convert pascals to forces, knowing the characteristic of the unit of pressure in relation to the unit of force (). One corresponds to one newton per square meter. The derived unit of force in newtons is 1 kg/(m/s²), where m/s² is the acceleration due to gravity. For calculations, its value equal to 9.81 m / s² is used. Calculate the number of kilograms of force of one newton acting on one square meter with an acceleration equal to 9.81 m / s²: - 1 / 9.81 \u003d 0.102 kilograms of force per square meter, which corresponds to a pressure of one pascal.

Multiply the resulting figure by the number of pascals that you need to convert to kilograms: 0.102 * 3,000,000 (Pa) \u003d we get 306,000 (kg / m²). Thus, a pressure of 3 megapascals corresponds to 306,000 kilograms of force per square meter. So, to quickly convert pascals to kilograms, multiply the pressure in pascals by a factor of 0.102. If you need to convert pascals to kilograms of force per square centimeter, then you need to multiply the pressure in pascals by a factor of 0.0000102. In this example, a pressure of 3 megapascals corresponds to 30.6 kilograms of force per square centimeter (3,000,000 Pa * 0.0000102 = 30.6 kg / cm²).

note

The gravitational acceleration value is used to calculate the conversion factor from pascals to kilograms of force in accordance with Newton's second law (gravitational acceleration is equal to the force of gravity acting on an object of unit mass). The value of the gravitational acceleration in technical calculations is used equal to 9.81 m / s².

Sources:

Pressure. Translation converter
kgf how to translate

The pascal is the standard system unit for measuring pressure. However, in practice others are often used - non-systemic, multiple and submultiple units. These are millimeters of mercury and meters of water column, technical and physical atmospheres, bar, as well as kilopascal, megapascal, millipascal and micropascal. To convert these units from one system to another, there are special formulas.

You will need

- calculator;
- a computer;
- the Internet.

Instruction

If you do not have a calculator at hand, then use a pen and paper to convert megapascals to pascals. To do this, write down the number of megapascals, and then move the dot six digits to the right. For example: 1.23456789 -> 1234567.89

If the number of megapascals is an integer (which is very rare in practice), then add six zeros to this number on the right: 12 -> 12000000

If, after moving the decimal point, “extra” zeros appeared on the left side of the number, then simply discard them: 0.000123456 -> 0000123.456 -> 123.456

Concepts such as bar and atmosphere are familiar to every true owner, because it is in these quantities that any pressure is measured: water in a tap / system, air in the wheels of cars, etc. However, not everyone can accurately answer how many atmospheres 1 bar contains, since quite often these values are simply equated, attributing the difference between them to an error. But is it right? Let's figure it out.

What is the bar and atmosphere?

Bar is a word of Greek origin, literally translated as “heaviness”. In science, this word is called immediately 2 units:

the first is the generally accepted unit of pressure in the physical system of units CGS (CentimeterGramSecond);
the second is the off-system meteorological, also called the standard atmosphere.

In the first case, 1 bar \u003d 1 dyn / cm 2, where 1 dyne is the unit of force.

In the second, 1 bar (standard atmosphere) \u003d 1 * ֹ10 6 dynes / cm 2 (bar from the GHS).

Atmosphere is also a unit of pressure with a double meaning:

in the first case (it is called standard, normal and physical and is denoted by “atm”) it is equal to the atmospheric pressure present at sea level at zero temperature and normal acceleration of gravity, we will not overload you with unnecessary numbers, let’s just say that it is equal to 101325 Pa;
in the second case (when the atmosphere is called technical and denoted by "at") it is equal to the pressure produced by a force of 1 kgf on a perpendicular surface of 1 cm 2. In Pascals (Pa) it is 98066.5. As you can see, the difference between them is noticeable, although not very significant - just over 3%.

For reference.

1 kgf (kilogram-force) is a generally accepted (along with a second and a meter) unit of force, equal to the force that imparts acceleration of free fall to a kilogram at rest.
1 Pa is a unit of pressure equal to the force that is uniformly imparted to the surface of 1 m 2 of area by a force equal to 1 N.
1 dyne / cm 2 \u003d 0.1 Pa.
1 N \u003d 1 kg m / s 2 \u003d 10 5 dyn.

Because of such a variety of definitions, all the confusion occurs, so as not to understand what people came up with to round up 1 bar = 1 atmosphere. But in fact, everything is extremely simple.

So, how many atmospheres is 1 bar?

In meteorology 1 bar = 0.98692 atm, in all other areas 1 bar = 1.0197 atm.

Therefore, to convert bars to atmospheres, it is enough to simply divide the given number of bars by 0.98692 (or 1.0197, if we are talking about meteorology)

For example, you have a pressure of 5 bar, in atmospheres it is 5/0.98692=5.066 atm.

Quite often, when calculating the parameters of water supply or heating, it is required to convert bars to atm or atm to MPa, since in various sources (reference books, technical literature etc.) pressure values can be indicated in different units of measurement. For convenience, we present you a summary table for the conversion of pressure units:

Units	bar	mmHg.	mm water column	atm (physical)	kgf / m 2	kgf / cm 2 (technical atm.)	Pa	kPa	MPa
1 bar	1	750,064	10197,16	0,986923	10,1972 ∙10 3	1,01972	10 5	100	0,1
1 mmHg	1,33322 ∙10 -3	1	13,5951	1,31579 ∙10 -3	13,5951	13,5951 ∙10 -3	133,322	133,322 ∙10 -3	133,32 ∙10 -6
1 mm w.c.	98,0665 ∙10 -6	73,5561 ∙10 -3	1	96,7841 ∙10 -6	1	0,1 ∙10 -3	9,80665	9,80665 ∙10 -3	9,8066 ∙10 -6
1 atm	1,01325	760	10,3323 ∙10 3	1	10,3323 ∙10 3	1,03323	101,325 ∙10 3	101,325	101,32 ∙10 -3
1 kgf / m 2	98,0665 ∙10 -6	73,5561 ∙10 -3	1	96,7841 ∙10 -6	1	0,1 ∙10 -3	9,80665	9,80665 ∙10 -3	9,8066 ∙10 -6
1 kgf / cm 2	0,980665	735,561	10000	0,967841	10000	1	98,0665 ∙10 3	98,0665	98,066 ∙10 -3
1 Pa	10 -5	7,50064∙10 -3	0,1019716	9,86923 ∙10 -6	101,972 ∙10 -3	10,1972 ∙10 -6	1	10 -3	10 -6
1 kPa	0,01	7,50064	101,9716	9,86923 ∙10 -3	101,972	10,1972 ∙10 -3	10 3	1	10 -3
1 MPa	10	7,50064 ∙10 3	101971,6	9,86923	101,972 ∙10 3	10,1972	10 6	10 3	1

The SI system includes: Bar 1 bar = 0.1 MPa 1 bar = 10197.16 kgf/m2 1 bar = 10 N/cm2 Pa 1 Pa = 1000MPa 1 MPa = 7500 mm. rt. Art. 1 MPa = 106 N/m2					Engineering units: 1 mmHg = 13.6 mm w.c. 1 mm w.c. = 0.0001kgf/cm2 1 mm w.c. = 1 kgf/m2 1 atm = 101.325 ∙ 103 Pa

Detailed list of pressure units:

1 Pa (N / m 2) \u003d 0.0000102 Atmosphere "metric" / Atmosphere (metric)
1 Pa (N/m 2) = 0.0000099 Standard atmosphere Atmosphere (standard) = Standard atmosphere
1 Pa (N / m 2) \u003d 0.00001 Bar / Bar
1 Pa (N / m 2) \u003d 10 Barad / Barad
1 Pa (N / m 2) \u003d 0.0007501 Centimeters of mercury. Art. (0°C)
1 Pa (N / m 2) \u003d 0.0101974 Centimeters in. Art. (4°C)
1 Pa (N / m 2) \u003d 10 dyne / square centimeter
1 Pa (N/m 2) = 0.0003346 Foot of water / Foot of water (4 °C)
1 Pa (N / m 2) \u003d 10 -9 Gigapascals
1 Pa (N / m 2) \u003d 0.01 Hectopascals
1 Pa (N / m 2) \u003d 0.0002953 Dumov Hg / Inch of mercury (0 °C)
1 Pa (N / m 2) \u003d 0.0002961 Inches of mercury. Art. / Inch of mercury (15.56 °C)
1 Pa (N / m 2) \u003d 0.0040186 Dumov w.st. / Inch of water (15.56 °C)
1 Pa (N / m 2) \u003d 0.0040147 Dumov w.st. / Inch of water (4 °C)
1 Pa (N / m 2) \u003d 0.0000102 kgf / cm 2 / Kilogram force / centimetre 2
1 Pa (N / m 2) \u003d 0.0010197 kgf / dm 2 / Kilogram force / decimetre 2
1 Pa (N / m 2) \u003d 0.101972 kgf / m 2 / Kilogram force / meter 2
1 Pa (N / m 2) \u003d 10 -7 kgf / mm 2 / Kilogram force / millimeter 2
1 Pa (N / m 2) \u003d 10 -3 kPa
1 Pa (N / m 2) \u003d 10 -7 Kilopound force / square inch / Kilopound force / square inch
1 Pa (N / m 2) \u003d 10 -6 MPa
1 Pa (N / m 2) \u003d 0.000102 Meters w.st. / Meter of water (4 °C)
1 Pa (N / m 2) \u003d 10 Microbar / Microbar (barye, barrie)
1 Pa (N / m 2) \u003d 7.50062 Microns of mercury / Micron of mercury (millitorr)
1 Pa (N / m 2) \u003d 0.01 Milibar / Millibar
1 Pa (N/m 2) = 0.0075006 Millimeter of mercury (0 °C)
1 Pa (N / m 2) \u003d 0.10207 Millimeters of w.st. / Millimeter of water (15.56 °C)
1 Pa (N / m 2) \u003d 0.10197 Millimeters w.st. / Millimeter of water (4 °C)
1 Pa (N / m 2) \u003d 7.5006 Millitorr / Millitorr
1 Pa (N/m2) = 1N/m2 / Newton/square meter
1 Pa (N / m 2) \u003d 32.1507 Daily ounces / sq. inch / Ounce force (avdp)/square inch
1 Pa (N / m 2) \u003d 0.0208854 Pounds of force per sq. foot / Pound force/square foot
1 Pa (N / m 2) \u003d 0.000145 Pounds of force per sq. inch / Pound force/square inch
1 Pa (N / m 2) \u003d 0.671969 Poundals per sq. foot / Poundal/square foot
1 Pa (N / m 2) \u003d 0.0046665 Poundals per sq. inch / Poundal/square inch
1 Pa (N / m 2) \u003d 0.0000093 Long tons per sq. foot / Ton (long)/foot 2
1 Pa (N / m 2) \u003d 10 -7 Long tons per sq. inch / Ton(long)/inch 2
1 Pa (N / m 2) \u003d 0.0000104 Short tons per sq. foot / Ton (short)/foot 2
1 Pa (N / m 2) \u003d 10 -7 Tons per sq. inch / Ton/inch 2
1 Pa (N / m 2) \u003d 0.0075006 Torr / Torr