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kPa to Torr Converter
↔ Convert torr to kPa instead

Common Conversions

kPa torr
0.1 0.75
1 7.501
5 37.503
10 75.006
25 187.516
50 375.031
100 750.062
101.325 760
150 1125.093
200 1500.124
500 3750.31

Why this conversion matters in chemistry

Older Antoine-equation tables list vapor pressures in torr; modern NIST WebBook data lists the same quantities in kPa. Water at 25 °C has a vapor pressure of 3.17 kPa, equivalently 23.8 torr — the bridging value that lets a contemporary lab cross-check a measurement against the pre-SI literature. The constant of 7.50062 torr per kPa comes from 760 torr = 101.325 kPa, the historical definition of standard atmospheric pressure. It comes up when modern SI vapor-pressure data needs to land alongside legacy torr-based references or vacuum-gauge readings.

Formula

torr = kPa × 7.50062

Worked Examples

101.325 kPa = 760 torr

Standard atmospheric pressure expressed in both unit systems.

1 kPa = 7.501 torr

The conversion anchor — useful for any quick mental scale check.

3.17 kPa = 23.77 torr

Water vapor pressure at 25 °C — the value behind any humid-air calculation.

100 kPa = 750.062 torr

Exactly 1 bar — IUPAC standard pressure expressed in torr.

Frequently Asked Questions

How do I convert kPa to torr?
Multiply by 7.50062. So 101.325 kPa becomes exactly 760 torr — standard atmospheric pressure. The factor is exact through the 760 torr = 1 atm = 101.325 kPa identity.
What is 100 kPa in torr?
Exactly 750.062 torr — the IUPAC reference pressure of 1 bar in torr. About 1.3% less than 1 atm (which is 760 torr).
When does this conversion show up?
Cross-checking against older chemistry literature that tabulates vapor pressures in torr, or reading vacuum-gauge data on equipment calibrated in torr while the reported data sits in kPa.
How do kPa, torr, and atm relate?
101.325 kPa = 760 torr = 1 atm, all by definition. 100 kPa = 750.062 torr = 0.98692 atm — the difference between the historical atm and the modern bar reference.