The torr is a unit of pressure named after the Italian physicist Evangelista Torricelli, who invented the barometer in the 17th century. It is defined as 1/760th of an atmosphere, approximating the pressure exerted by a one-millimeter column of mercury at 0 degrees Celsius. What makes the torr particularly interesting is its practical use in fields like vacuum technology and weather forecasting, where precise measurements of atmospheric pressure are crucial.

The legacy of Torricelli’s work is integral to meteorology and physics, as it opened paths for understanding atmospheric pressure. Beyond scientific circles, the torr is a reminder of human ingenuity in unraveling atmospheric mysteries and continues to play a vital role in today’s scientific advancements.

Did you know?

The millimeter of mercury (mmHg) is a unit of pressure traditionally used in medicine and meteorology, and its history dates back to the barometer invention by Evangelista Torricelli in 1643. Often, it is associated with measuring blood pressure and intraocular pressure, representing the pressure exerted by a column of mercury precisely 1 millimeter high. This fascinating unit highlights the interplay of physics and medicine, reflecting both the force of blood circulating against vessel walls and the atmospheric pressure’s effects on our weather systems.

Interestingly, mmHg is one of the few units still officially sanctioned for use with SI (International System of Units) under specific legal and medical contexts, underscoring its importance over centuries. Despite the global shift towards using Pascals for pressure, mmHg remains ingrained in clinical settings because of its historical usage and direct relation to human physiology. Its origins and continued use illustrate how historical scientific instruments still influence modern practices.

Torr

Millimeters of mercury

0 torr

0 mmHg

10 torr

10.00003 mmHg

20 torr

20.00006 mmHg

30 torr

30.00008 mmHg

40 torr

40.00011 mmHg

50 torr

50.00014 mmHg

60 torr

60.00017 mmHg

70 torr

70.00019 mmHg

80 torr

80.00022 mmHg

90 torr

90.00025 mmHg

100 torr

100.00028 mmHg

110 torr

110.0003 mmHg

120 torr

120.00033 mmHg

130 torr

130.00036 mmHg

140 torr

140.00039 mmHg

150 torr

150.00041 mmHg

160 torr

160.00044 mmHg

170 torr

170.00047 mmHg

180 torr

180.0005 mmHg

190 torr

190.00053 mmHg

200 torr

200.00055 mmHg

210 torr

210.00058 mmHg

220 torr

220.00061 mmHg

230 torr

230.00064 mmHg

240 torr

240.00066 mmHg

250 torr

250.00069 mmHg

260 torr

260.00072 mmHg

270 torr

270.00075 mmHg

280 torr

280.00077 mmHg

290 torr

290.0008 mmHg

300 torr

300.00083 mmHg

310 torr

310.00086 mmHg

320 torr

320.00088 mmHg

330 torr

330.00091 mmHg

340 torr

340.00094 mmHg

350 torr

350.00097 mmHg

360 torr

360.00099 mmHg

370 torr

370.00102 mmHg

380 torr

380.00105 mmHg

390 torr

390.00108 mmHg

400 torr

400.00111 mmHg

410 torr

410.00113 mmHg

420 torr

420.00116 mmHg

430 torr

430.00119 mmHg

440 torr

440.00122 mmHg

450 torr

450.00124 mmHg

460 torr

460.00127 mmHg

470 torr

470.0013 mmHg

480 torr

480.00133 mmHg

490 torr

490.00135 mmHg

500 torr

500.00138 mmHg

510 torr

510.00141 mmHg

520 torr

520.00144 mmHg

530 torr

530.00146 mmHg

540 torr

540.00149 mmHg

550 torr

550.00152 mmHg

560 torr

560.00155 mmHg

570 torr

570.00158 mmHg

580 torr

580.0016 mmHg

590 torr

590.00163 mmHg

600 torr

600.00166 mmHg

610 torr

610.00169 mmHg

620 torr

620.00171 mmHg

630 torr

630.00174 mmHg

640 torr

640.00177 mmHg

650 torr

650.0018 mmHg

660 torr

660.00182 mmHg

670 torr

670.00185 mmHg

680 torr

680.00188 mmHg

690 torr

690.00191 mmHg

700 torr

700.00193 mmHg

710 torr

710.00196 mmHg

720 torr

720.00199 mmHg

730 torr

730.00202 mmHg

740 torr

740.00204 mmHg

750 torr

750.00207 mmHg

760 torr

760.0021 mmHg

770 torr

770.00213 mmHg

780 torr

780.00216 mmHg

790 torr

790.00218 mmHg

800 torr

800.00221 mmHg

810 torr

810.00224 mmHg

820 torr

820.00227 mmHg

830 torr

830.00229 mmHg

840 torr

840.00232 mmHg

850 torr

850.00235 mmHg

860 torr

860.00238 mmHg

870 torr

870.0024 mmHg

880 torr

880.00243 mmHg

890 torr

890.00246 mmHg

900 torr

900.00249 mmHg

910 torr

910.00251 mmHg

920 torr

920.00254 mmHg

930 torr

930.00257 mmHg

940 torr

940.0026 mmHg

950 torr

950.00263 mmHg

960 torr

960.00265 mmHg

970 torr

970.00268 mmHg

980 torr

980.00271 mmHg

990 torr

990.00274 mmHg

1000 torr

1000.00276 mmHg

Conversion

Torr to Pascals

Go to converter

Torr to Kilopascals

Go to converter

Torr to Megapascals

Go to converter

Torr to Hectopascals

Go to converter

Torr to Millibar

Go to converter

Torr to Bar

Go to converter

Torr to Meters of water @ 4°C

Go to converter

Torr to Pounds per square inch

Go to converter

Torr to Kilopound per square inch

Go to converter

Torr to Inches of mercury

Go to converter

Torr to Millimeters of mercury Conversion

Did you know?

> Torr to Millimeters of mercury Conversion Table

> Other Conversions

:: Pressure Units

Did you know? Expand

> Torr to Millimeters of mercury Conversion Table

> Other Conversions

:: Pressure Units

:: Spread the Word

Did you know?