Convert Pascal to Torr
1 pascal = 0.007500617 torr (Torr). For example, 10 pascal = 0.07500617 torr and 100 pascal = 0.7500617 torr. Type any value below to convert pascal to torr both ways — it runs entirely in your browser.
Quick answer: Pascal to Torr
1 Pascal = 0.007500617 Torr (Pa → Torr). To convert pascal to torr, multiply by 0.007500617. To convert torr to pascal, multiply by 133.3224. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common pascal-to-torr questions.
How to convert Pascal to Torr
To convert pascal to torr, multiply the number of pascal by the conversion factor 0.007500617, because 1 Pa = 0.007500617 Torr. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 Torr = 133.3224 Pa, so you divide by 0.007500617 (or multiply by 133.3224) to turn torr back into pascal.
Torr = Pa × 0.007500617 ·
Pa = Torr × 133.3224
- Write down the value you want to convert, in pascal.
- Multiply it by 0.007500617.
- The result is the same area/length/quantity expressed in torr.
Pascal to Torr — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 pascal is 0.03750308 torr because 5 Pa × 0.007500617 = 0.03750308 Torr.
| Pascal | Calculation | Torr |
|---|---|---|
| 1 Pa | 1 Pa × 0.007500617 = 0.007500617 Torr | 0.007500617 Torr |
| 2 Pa | 2 Pa × 0.007500617 = 0.01500123 Torr | 0.01500123 Torr |
| 3 Pa | 3 Pa × 0.007500617 = 0.02250185 Torr | 0.02250185 Torr |
| 5 Pa | 5 Pa × 0.007500617 = 0.03750308 Torr | 0.03750308 Torr |
| 7 Pa | 7 Pa × 0.007500617 = 0.05250432 Torr | 0.05250432 Torr |
| 10 Pa | 10 Pa × 0.007500617 = 0.07500617 Torr | 0.07500617 Torr |
| 12 Pa | 12 Pa × 0.007500617 = 0.0900074 Torr | 0.0900074 Torr |
| 15 Pa | 15 Pa × 0.007500617 = 0.1125093 Torr | 0.1125093 Torr |
| 20 Pa | 20 Pa × 0.007500617 = 0.1500123 Torr | 0.1500123 Torr |
| 25 Pa | 25 Pa × 0.007500617 = 0.1875154 Torr | 0.1875154 Torr |
| 50 Pa | 50 Pa × 0.007500617 = 0.3750308 Torr | 0.3750308 Torr |
| 100 Pa | 100 Pa × 0.007500617 = 0.7500617 Torr | 0.7500617 Torr |
Common Pascal to Torr conversions
These are the pascal-to-torr values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 pascal = 0.007500617 torr
- 2 pascal = 0.01500123 torr
- 2.5 pascal = 0.01875154 torr
- 3 pascal = 0.02250185 torr
- 4 pascal = 0.03000247 torr
- 5 pascal = 0.03750308 torr
- 6 pascal = 0.0450037 torr
- 7 pascal = 0.05250432 torr
- 8 pascal = 0.06000493 torr
- 9 pascal = 0.06750555 torr
- 10 pascal = 0.07500617 torr
- 12 pascal = 0.0900074 torr
- 15 pascal = 0.1125093 torr
- 20 pascal = 0.1500123 torr
- 25 pascal = 0.1875154 torr
- 30 pascal = 0.2250185 torr
- 50 pascal = 0.3750308 torr
- 75 pascal = 0.5625463 torr
- 100 pascal = 0.7500617 torr
- 200 pascal = 1.500123 torr
- 500 pascal = 3.750308 torr
- 1000 pascal = 7.500617 torr
Pascal to Torr conversion chart (both directions)
The chart below converts pascal to torr and torr to pascal side by side, so it works whichever way you need. 1 pascal = 0.007500617 torr, and 1 torr = 133.3224 pascal.
| Pascal → Torr | Torr → Pascal |
|---|---|
| 0.25 Pa = 0.001875154 Torr | 0.25 Torr = 33.33059 Pa |
| 0.5 Pa = 0.003750308 Torr | 0.5 Torr = 66.66118 Pa |
| 1 Pa = 0.007500617 Torr | 1 Torr = 133.3224 Pa |
| 2 Pa = 0.01500123 Torr | 2 Torr = 266.6447 Pa |
| 3 Pa = 0.02250185 Torr | 3 Torr = 399.9671 Pa |
| 4 Pa = 0.03000247 Torr | 4 Torr = 533.2895 Pa |
| 5 Pa = 0.03750308 Torr | 5 Torr = 666.6118 Pa |
| 6 Pa = 0.0450037 Torr | 6 Torr = 799.9342 Pa |
| 7 Pa = 0.05250432 Torr | 7 Torr = 933.2566 Pa |
| 8 Pa = 0.06000493 Torr | 8 Torr = 1,066.579 Pa |
| 9 Pa = 0.06750555 Torr | 9 Torr = 1,199.901 Pa |
| 10 Pa = 0.07500617 Torr | 10 Torr = 1,333.224 Pa |
| 12 Pa = 0.0900074 Torr | 12 Torr = 1,599.868 Pa |
| 15 Pa = 0.1125093 Torr | 15 Torr = 1,999.836 Pa |
| 20 Pa = 0.1500123 Torr | 20 Torr = 2,666.447 Pa |
| 25 Pa = 0.1875154 Torr | 25 Torr = 3,333.059 Pa |
| 30 Pa = 0.2250185 Torr | 30 Torr = 3,999.671 Pa |
| 40 Pa = 0.3000247 Torr | 40 Torr = 5,332.895 Pa |
| 50 Pa = 0.3750308 Torr | 50 Torr = 6,666.118 Pa |
| 75 Pa = 0.5625463 Torr | 75 Torr = 9,999.178 Pa |
| 100 Pa = 0.7500617 Torr | 100 Torr = 13,332.24 Pa |
| 150 Pa = 1.125093 Torr | 150 Torr = 19,998.36 Pa |
| 200 Pa = 1.500123 Torr | 200 Torr = 26,664.47 Pa |
| 250 Pa = 1.875154 Torr | 250 Torr = 33,330.59 Pa |
| 500 Pa = 3.750308 Torr | 500 Torr = 66,661.18 Pa |
| 1000 Pa = 7.500617 Torr | 1000 Torr = 133,322.4 Pa |
Pascal vs Torr: which is bigger?
A torr is the larger unit: one torr equals 133.3224 pascals. Put another way, you need 133.3224 pascals to make a single torr.
What is a Pascal? History, origin and usage
The pascal is named after Blaise Pascal, who in 1648 had his brother-in-law carry a mercury barometer up the Puy de Dôme in central France and watch the mercury column fall as he climbed. That experiment showed air has weight and that the pressure it exerts drops with height. The unit itself is much younger: the name was adopted by the General Conference on Weights and Measures in 1971, replacing the older habit of writing pressures as "newtons per square metre".
The pascal is the SI unit of pressure and the base every other unit on this page is defined against. On its own it is awkwardly small for daily life — a sheet of paper resting on a table presses down with only a few pascals — so real-world figures are almost always given with a prefix: hectopascals for weather, kilopascals for tyres and gas, megapascals for concrete and hydraulics.
One pascal is one newton spread over one square metre, which is about the pressure of a five-rupee coin lying flat on a table. Because pressure is force divided by area, the same push concentrated into a smaller area gives a much higher pressure — which is why a drawing pin goes into a wall and your thumb does not.
What is a Torr? History, origin and usage
The torr honours Evangelista Torricelli, who built the first mercury barometer in 1643 and correctly explained that the column was held up by the weight of the air outside. The unit was named in the 1940s, and was defined as exactly one 760th of a standard atmosphere so that it would be tied to a fixed number rather than to the behaviour of real mercury.
Torr is the working unit of vacuum technology — vacuum pumps, freeze dryers, electron microscopes, semiconductor process chambers and mass spectrometers are all specified in torr or its subdivisions.
Because it is defined as a 760th of an atmosphere, 760 torr is one atmosphere exactly, by construction. It is very nearly the same as a millimetre of mercury but not exactly: the two differ by about one part in seven million, a gap that matters only in precision metrology and is the reason careful documents never treat the two names as interchangeable.
Convert 1 Pascal to other units
It can help to see a pascal next to the other units it is commonly compared with. One pascal (Pa) is equal to:
| 1 Pascal equals | Unit |
|---|---|
| 0.01 hPa | Hectopascal |
| 0.001 kPa | Kilopascal |
| 0.000001 MPa | Megapascal |
| 0.01 mbar | Millibar |
| 0.00001 bar | Bar |
| 0.000009869233 atm | Standard atmosphere |
| 0.007500617 Torr | Torr |
| 0.007500616 mmHg | Millimetre of mercury |
| 0.0002952998 inHg | Inch of mercury |
| 0.1019716 mmH₂O | Millimetre of water |
| 0.004014631 inH₂O | Inch of water |
| 0.0001450377 psi | Pound per square inch |
| 0.00001019716 kgf/cm² | Kilogram-force per square centimetre |
Convert 1 Torr to other units
One torr (Torr) is equal to:
| 1 Torr equals | Unit |
|---|---|
| 133.3224 Pa | Pascal |
| 1.333224 hPa | Hectopascal |
| 0.1333224 kPa | Kilopascal |
| 0.0001333224 MPa | Megapascal |
| 1.333224 mbar | Millibar |
| 0.001333224 bar | Bar |
| 0.001315789 atm | Standard atmosphere |
| 0.9999999 mmHg | Millimetre of mercury |
| 0.03937007 inHg | Inch of mercury |
| 13.5951 mmH₂O | Millimetre of water |
| 0.5352401 inH₂O | Inch of water |
| 0.01933677 psi | Pound per square inch |
| 0.00135951 kgf/cm² | Kilogram-force per square centimetre |
Tips for converting Pascal to Torr
- To go from pascal to torr, multiply by 0.007500617; to go back, divide by 0.007500617 (or multiply by 133.3224).
- For a quick mental estimate, remember that 1 pascal ≈ 0.007500617 torr, so 10 pascal ≈ 0.07500617 torr.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Pascal to Torr converter
Type a number into the Pascal field and the equivalent in Torr appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Torr field to convert the other way (torr to pascal). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 Pa = 0.007500617 Torr), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for pascal-to-torr conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
- NIST — Definitions of the SI base units — the US National Institute of Standards and Technology reference for the SI base units, used here as an independent cross-check on the base-unit definition.
Pressure factors here come from fixed definitions, anchored to the pascal: a bar is exactly 100,000 Pa, one atmosphere is exactly 101,325 Pa, a torr is exactly a 760th of an atmosphere, and psi is built from the exact pound and the exact inch. Two of them — psi and the torr — work out to decimals that repeat forever, so where a number is shown rounded it is marked, not quietly trimmed.
Frequently asked questions
- How many torr are in 1 pascal?
- 1 pascal = 0.007500617 torr (Torr). To convert any number of pascal to torr, multiply by 0.007500617.
- How do I convert pascal to torr?
- Multiply the number of pascal by 0.007500617. For example, 10 pascal = 10 × 0.007500617 = 0.07500617 torr, and 25 pascal = 0.1875154 torr.
- How many pascal are in 1 torr?
- 1 torr = 133.3224 pascal. So to convert torr back to pascal, multiply by 133.3224.
- What is the formula to convert pascal to torr?
- torr = pascal × 0.007500617. The reverse formula is pascal = torr × 133.3224.
- How much is 100 pascal in torr?
- 100 pascal = 0.7500617 torr. (And 1000 pascal = 7.500617 torr.)
- Which is bigger, a pascal or a torr?
- A torr is larger: 1 torr = 133.3224 pascal.
- Is this pascal to torr converter accurate?
- Yes — every value is computed from the exact 0.007500617 Torr per Pa factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert torr to pascal too?
- Yes. The converter works both ways — enter a value in either field. 1 torr = 133.3224 pascal.