User registration

We strongly recommend that you read the introductory sections of the Information page and that you also work through the BCal Tutorial before using BCal.


This software is provided for academic research purposes only.  Individuals, institutions and companies wishing to use this software for commercial purposes should contact the University of Sheffield via Caitlin Buck (

While the University of Sheffield ("the University") has used all reasonable endeavours to ensure the quality of this software, the University makes no warranty, express or implied, as to fitness for purpose and will not be held responsible for any consequence arising out of any inaccuracies or omissions. Individuals, organisations and companies which use this software do so on the understanding that no liability whatsoever either direct or indirect shall rest upon the University for the effects of any act, product, process or method that may be effected, produced or adopted by any party, notwithstanding that the formulation of such act, product, process or method may be based upon use of this software.


Copyright © University of Sheffield, 1999-2014. All rights reserved.

Certain software components embedded within BCal are owned by third parties:

mexcal is Copyright © 1999, 2008, J. A. Christen, CIMAT, MEXICO.
Gnuplot is Copyright © 1986 - 1993, 1998, 2004 Thomas Williams, Colin Kelley.
fly is Copyright © 1995-2009, Martin Gleeson.
The Java(tm) Language Environment is Copyright © 1995, 1996, Sun Microsystems, Inc. All rights reserved.
The Generic Collection Library for Java(tm) is Copyright © 1997 ObjectSpace, Inc. - All Rights Reserved.
R is Copyright © 2014 The R Foundation for Statistical Computing.
CODA is Copyright © 1995-2012 The R Core Team.
Apache Tomcat is copyright © 1999-2013 The Apache Software Foundation.

BCal also incorporates:

available at the website of the journal Radiocarbon as supplementary material to the 2013 Calibration Special Issue (Volume 55, nr 4, 2013). available at the website of the journal Radiocarbon as supplementary material to the 2004 Calibration Special Issue (Volume 46, nr 3, 2004). provided by the Quaternary Isotope Laboratory, University of Washington; see (Stuiver 1998).