How this calculator works
All values are pressure quantities on the same reference basis; this does not translate gauge pressure to absolute pressure. Torr uses 1/760 of a standard atmosphere; conventional mmHg uses 133.322387415 Pa and differs slightly.
The formula
Base amount = value × source factor
Target amount = base amount / target factorA quick example
1 standard atmosphere = 101,325 Pa = 760 Torr.
How to use this calculator
- Enter a value using a decimal point.
- Choose the source and target units.
- Read the live result or swap units to reverse the direction.
A few common questions
Which convention does this converter use?
All values are pressure quantities on the same reference basis; this does not translate gauge pressure to absolute pressure. Torr uses 1/760 of a standard atmosphere; conventional mmHg uses 133.322387415 Pa and differs slightly.
Can I reverse the conversion?
Yes. Swap exchanges the units, keeps your input amount and calculates again.
Why is the displayed result rounded?
The calculation uses the full stored factor. Results show up to six decimal places, with scientific notation for very small or large amounts.
Reference: NIST conversion factors