Torrs to Inches of Mercury Converter

How to convert torrs to inches of mercury

FormulainHg = Torr × 0.03937007313

Multiply the value in torrs by 0.03937007313. To go the other way, multiply by 25.40000362 (or divide by 0.03937007313).

A torr is smaller than an inch of mercury: it takes 25.40000362 torrs to make one inch of mercury.

Worked examples

1 torr1 Torr × 0.03937007313 = 0.03937007313 inHg
5 torrs5 Torr × 0.03937007313 = 0.1968503657 inHg
10 torrs10 Torr × 0.03937007313 = 0.3937007313 inHg
20 torrs20 Torr × 0.03937007313 = 0.7874014626 inHg
100 torrs100 Torr × 0.03937007313 = 3.937007313 inHg

Torrs to inches of mercury conversion table

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

Torrs to inches of mercury: 0.1–10 Torr
Torrs (Torr)	Inches of mercury (inHg)
0.1 Torr	0.0039370073 inHg
0.25 Torr	0.0098425183 inHg
0.5 Torr	0.019685037 inHg
1 Torr	0.039370073 inHg
2 Torr	0.078740146 inHg
3 Torr	0.11811022 inHg
4 Torr	0.15748029 inHg
5 Torr	0.19685037 inHg
6 Torr	0.23622044 inHg
7 Torr	0.27559051 inHg
8 Torr	0.31496059 inHg
9 Torr	0.35433066 inHg
10 Torr	0.39370073 inHg

Torrs to inches of mercury: 12–1,000 Torr
Torrs (Torr)	Inches of mercury (inHg)
12 Torr	0.47244088 inHg
15 Torr	0.5905511 inHg
20 Torr	0.78740146 inHg
25 Torr	0.98425183 inHg
30 Torr	1.1811022 inHg
40 Torr	1.5748029 inHg
50 Torr	1.9685037 inHg
75 Torr	2.9527555 inHg
100 Torr	3.9370073 inHg
250 Torr	9.8425183 inHg
500 Torr	19.685037 inHg
1,000 Torr	39.370073 inHg

About the units

Torr (Torr)

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

Inch of mercury (inHg)

About 3,386.39 Pa. US weather reports and aircraft altimeters use inches of mercury (standard is 29.92 inHg). One inch of mercury equals 3,386.38864 pascals (Pa).

Frequently asked questions

How many inches of mercury are in one torr?

There are 0.03937007313 inches of mercury in one torr, and this value is exact by definition.

How do I convert torrs to inches of mercury?

Multiply the number of torrs by 0.03937007313. For example, 10 Torr × 0.03937007313 = 0.3937007313 inHg.

How many torrs are in one inch of mercury?

One inch of mercury equals 25.40000362 torrs. That is the reverse factor, 1 ÷ 0.03937007313.

What is 10 torrs in inches of mercury?

10 Torr = 0.3937007313 inHg.

Is this Torr to inHg 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.