torr to atm | Exact Decimal + Formula

1 Torr = 0.001316 Atmosphere

One atmosphere equals about 760 torr (exactly 760.0000024 Torr). Real-world use: vacuum systems and blood-pressure history (mmhg). This page expresses those values in atmospheres, which is used for scuba decompression tables and engineering reference conditions. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About Torr and Atmosphere

Torr (Torr)

A torr is 1/760 of an atmosphere, essentially equal to one millimeter of mercury.

Where it's used: Vacuum systems and blood-pressure history (mmHg).

Atmosphere (atm)

One standard atmosphere is exactly 101,325 pascals, the average sea-level air pressure.

Where it's used: Scuba decompression tables and engineering reference conditions.

Pressure Converter

From

Tab Switch fieldsS SwapC Copy

Precision

Formula

atm = Torr × 0.001315789

To convert Torr to Atmosphere, use the formula displayed above.

Pinned Favorites

No pinned converters yet. Click the star button to pin common pairs.

Recent History

Conversions you copy will be recorded here.

Torr to Atmosphere: Quick Reference Table

Torr	Atmosphere (Decimal)	Fraction	Real-world equivalent
0.001 Torr	0.000001 atm	-	fractional unit measurement
0.01 Torr	0.000013 atm	-	fractional unit measurement
0.1 Torr	0.000132 atm	-	fractional unit measurement
0.5 Torr	0.000658 atm	-	fractional unit measurement
1 Torr	0.001316 atm	-	fractional unit measurement
2 Torr	0.002632 atm	-	fractional unit measurement
5 Torr	0.006579 atm	-	fractional unit measurement
10 Torr	0.013158 atm	-	fractional unit measurement
25 Torr	0.032895 atm	-	fractional unit measurement
50 Torr	0.065789 atm	-	fractional unit measurement
100 Torr	0.131579 atm	-	fractional unit measurement
250 Torr	0.328947 atm	-	fractional unit measurement
500 Torr	0.657895 atm	-	fractional unit measurement
1000 Torr	1.315789 atm	-	standard single unit scale

Torr to atm Formula and Examples

Direct Formula atm = Torr × 0.001315789

Inverse Formula Torr = atm × 760.000002

Mental Math Shortcut

Divide the value by roughly 760 to quickly estimate the converted result.

Common Torr to Atmosphere Calculations

5 Torr = 0.006579 atm
10 Torr = 0.013158 atm
50 Torr = 0.065789 atm
100 Torr = 0.131579 atm
500 Torr = 0.657895 atm

Precision & Practical Use

For example, 10 Torr = 0.013158 atm — roughly fractional unit measurement.

Tire pressures are specified to 1 psi or 0.1 bar; scuba and HVAC work also use whole units. The extra decimals here are for engineering precision.

Related Specialist Pressure Calculators & Niche Tools

Pressure represents force acting over a unit of area. Standard pressure scales like PSI, bar, kilopascals (kPa), and atmospheres (atm) are utilized in HVAC, hydraulics, automotive tire inflation, and pneumatic tool operations.

Converting pressure ratings accurately is essential for equipment safety. For instance, European machinery gauges often use bar, whereas American compressors use PSI, necessitating quick conversions to prevent system over-pressurization. Our pressure calculators help technicians easily convert between scales, ensuring pressure vessels, hydraulic lines, and automotive tires are maintained at the correct operational levels.

PSI/Bar/kPa Converter Convert pressure units.

How to Convert Torr to Atmosphere

How many atmospheres are in one torr?

One Torr (Torr) equals 0.001316 Atmosphere (atm). To convert torrs to atmospheres, multiply the torr value by 0.001316.

How do I convert Torr to Atmosphere?

Multiply your torr value by 0.001316 to get the result in Atmosphere: atm = Torr × 0.001316. For example, 5 Torr = 0.006579 atm.

What is the formula for converting Torr to atm?

The conversion formula is atm = Torr × 0.001316. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for Torr to atm?