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Standard Atmospheric Pressure for Long Range Shooting

I’ve found myself needing to reference this info a lot while making data cards. It indicates the standard atmospheric pressure at different elevations. Pressure can vary quite a bit from the “standard” listed here, and although that won’t make much of a difference at short or mid ranges … when you get out to 1,000 yards or beyond it can make a noticeable difference. If you know the specific pressure the day you are shooting, it could really help your ballistics tables be more accurate. Having a Kestrel that can measure the instantaneous pressure is the best solution.

Altitude (ft) Pressure (inHg)
0 (Sea Level) 29.92
1,000 29.86
2,000 27.82
3,000 26.82
4,000 25.84
5,000 24.90
6,000 23.98
7,000 23.09
8,000 22.23
9,000 21.39
10,000 20.58

About Cal

Cal Zant is the shooter/author behind PrecisionRifleBlog.com. Cal is a life-long learner, and loves to help others get into this sport he's so passionate about. His engineering background, unique data-driven approach, and ability to present technical and complex information in a unbiased and straight-forward fashion has quickly caught the attention of the industry. For more info on Cal, check out PrecisionRifleBlog.com/About.

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