Aerospace Medicine Systematic Review Group
Tool to translate different units
used to express partial gravity into
the gravitational acceleration ‘g’
Tool to translate different units used to express partial gravity into the gravitational
Depending on the technical principles used to simulate partial gravity, following different units
are used to express partial gravity conditions:
Percent of body weight (% BW)
Percent of body weight support (% BWS)
Degree of head-up tilt (° HUT)
Gravitational acceleration (g)
For a uniform designation, this tool helps to translate different units into the gravitational
If the tool is used, please cite as:
C. Richter, B. Braunstein, A. Winnard, M. Nasser and T. Weber. (2017). Human
Biomechanical and Cardiopulmonary Responses to Partial Gravity – A Systematic
Review. Frontiers in Physiology, https://doi.org/10.3389/fphys.2017.00583
Tool for Assessing Methodological Quality of Partial Gravity Simulation Models. Available
Notes on use and interpretation:
The exact value for Lunar gravity depicted through solid diamonds is 0.16 g or 9.21°
HUT or 16% BW or 84% BWS.
The exact value for Martian gravity depicted through solid circles is 0.38 g or 22.33°
HUT or 38% BW or 62% BWS.
This Tool was created by Charlotte Richter.
It was made available online for the first time in August 2017.
The Aerospace Medicine Systematic Review Group is based in the Aerospace Medicine and
Rehabilitation Laboratory at Northumbria University, Newcastle, UK and is a collaboration of
Aerospace research professionals from across the world.