Dew Points

Moisture content in gases. To convert parts per million by volume of water vapor to dew point, use the following table:

D.P.*	ppm	D.P.*	ppm	D.P.*	ppm
–130ºF	0.10	–83ºF	6.2	–60ºF	34.0
–120	0.25	–82	6.6	–59	36.5
–110	0.63	–81	7.2	–58	39.0
–105	1.00	–80	7.8	–57	41.8
–104	1.08	–79	8.4	–56	44.6
–103	1.18	–78	9.1	–55	48.0
–102	1.29	–77	9.8	–54	51.0
–101	1.40	–76	10.5	–53	55.0
–100	1.53	–75	11.4	–52	59.0
–99	1.66	–74	12.3	–51	62.0
–98	1.81	–73	13.3	–50	67.0
–97	1.96	–72	14.3	–49	71.0
–96	2.15	–71	15.4	–48	76.0
–95	2.35	–70	16.6	–47	82.0
–94	2.54	–69	17.9	–46	87.0
–93	2.76	–68	19.2	–45	92.0
–92	3.00	–67	20.6	–44	98.0
–91	3.28	–66	22.1	–43	105.0
–90	3.53	–65	23.6	–42	113.0
–89	3.84	–64	25.6	–41	119.0
–88	4.15	–63	27.5	–40	128.0
–87	4.50	–62	29.4	–39	136.0
–86	4.78
–85	5.30
–84	5.70

*At 1 atmosphere pressure.