Pressure

Torrs to Atmospheres Converter

Convert torrs (Torr) to atmospheres (atm). 1 torr = 0.001315789474 atmospheres (exact)

1 torr = 0.00131578947368 atmospheres

How to convert torrs to atmospheres

Formulaatm = Torr × 0.001315789474

Because one standard atmosphere equals 760 torrs, you can also divide: atm = Torr ÷ 760.

A torr is smaller than a standard atmosphere: it takes 760 torrs to make one standard atmosphere.

Worked examples

  • 1 torr1 Torr × 0.001315789474 = 0.001315789474 atm
  • 5 torrs5 Torr × 0.001315789474 = 0.006578947368 atm
  • 10 torrs10 Torr × 0.001315789474 = 0.01315789474 atm
  • 20 torrs20 Torr × 0.001315789474 = 0.02631578947 atm
  • 100 torrs100 Torr × 0.001315789474 = 0.1315789474 atm

Torrs to atmospheres conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Torrs to atmospheres: 0.1–10 Torr
Torrs (Torr)Atmospheres (atm)
0.1 Torr0.00013157895 atm
0.25 Torr0.00032894737 atm
0.5 Torr0.00065789474 atm
1 Torr0.0013157895 atm
2 Torr0.0026315789 atm
3 Torr0.0039473684 atm
4 Torr0.0052631579 atm
5 Torr0.0065789474 atm
6 Torr0.0078947368 atm
7 Torr0.0092105263 atm
8 Torr0.010526316 atm
9 Torr0.011842105 atm
10 Torr0.013157895 atm
Torrs to atmospheres: 12–1,000 Torr
Torrs (Torr)Atmospheres (atm)
12 Torr0.015789474 atm
15 Torr0.019736842 atm
20 Torr0.026315789 atm
25 Torr0.032894737 atm
30 Torr0.039473684 atm
40 Torr0.052631579 atm
50 Torr0.065789474 atm
75 Torr0.098684211 atm
100 Torr0.13157895 atm
250 Torr0.32894737 atm
500 Torr0.65789474 atm
1,000 Torr1.3157895 atm

About the units

Torr (Torr)

Exactly 1/760 of a standard atmosphere; used in vacuum technology. One torr equals 133.3223684 pascals (Pa).

Standard atmosphere (atm)

Exactly 101,325 Pa — average sea-level air pressure.

Frequently asked questions

How many atmospheres are in one torr?

There are 0.001315789474 atmospheres in one torr, and this value is exact by definition.

How do I convert torrs to atmospheres?

Multiply the number of torrs by 0.001315789474. For example, 10 Torr × 0.001315789474 = 0.01315789474 atm.

How many torrs are in one standard atmosphere?

One standard atmosphere equals 760 torrs. That is the reverse factor, 1 ÷ 0.001315789474.

What is 10 torrs in atmospheres?

10 Torr = 0.01315789474 atm.

Is this Torr to atm converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.

Convert torrs to other units

Convert other units to atmospheres

Try “psi to bar”, “cups”, “binary” or “5 ft in cm”.