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We created thePhysical Constants Add-In because we find it useful. We thought others might find it useful too, so we created this web site. There are other sources of science and engineering constants out there, but we think ours is better. And it's free!
Well, sort of. For years we've paid the costs of creating and maintaining DimensionEngine tools ourselves. We don't want to bother with the hassle of selling software and services. But if you find our products useful and would like to see us continue to maintain and improve them, please consider supporting us. The more support we get, the better DimensionEngine and our Add-Ins will become.
Thank you!
The DimensionEngine Team