Conversion Tables

International vacuum/pressure conversion table

Unit	bar	N/cm²	kPa	atm, kp/cm²	m H₂O	torr, mm Hg	in Hg	psi
bar	1	10	100	1.0197	1.0197	750.06	29.54	14.5
N/cm²	0.1	1	10	0.1019	0.1019	75.006	2.954	1.45
kPa	0.01	0.1	1	0.0102	0.0102	7.5006	0.2954	0.145
atm, kp/cm²	0.9807	9.807	98.07	1	1	735.56	28.97	14.22
m H₂O	0.9807	9.807	98.07	1	1	735.56	28.97	14.22
torr, mm Hg	0.00133	0.01333	0.1333	0.00136	0.00136	1	0.0394	0.0193
in Hg	0.0338	0.3385	3.885	0.03446	0.03446	25.35	1	0.49
psi	0.0689	0.6896	6.896	0.0703	0.0703	51.68	2.035	1

Relative vacuum [%]	Residual pressure, absolute [bar]	Pressure, relative [bar]	N/cm²	kPa	atm, kp/cm²	m H₂O	torr, mm Hg	in Hg
10	0.9	–0.101	–1.01	–10.1	–0.103	–0.103	–76	–3
20	0.8	–0.203	–2.03	–20.3	–0.207	–0.207	–152	–6
30	0.7	–0.304	–3.04	–30.4	–0.31	–0.31	–228	–9
40	0.6	–0.405	–4.05	–40.5	–0.413	–0.413	–304	–12
50	0.5	–0.507	–5.07	–50.7	–0.517	–0.517	–380	–15
60	0.4	–0.608	–6.08	–60.8	–0.62	–0.62	–456	–18
70	0.3	–0.709	–7.09	–70.9	–0.723	–0.723	–532	–21
80	0.2	–0.811	–8.11	–81.1	–0.827	–0.827	–608	–24
90	0.1	–0.912	–9.12	–91.2	–0.93	–0.93	–684	–27