Convert from estimated average glucose (eAG) in mg/dL to HbA1c based on ADA and Diabetes UK calculator.
Also, BMI calculator.

ADA, EASD and IDF are recommending the use of a new term in diabetes management, estimated average glucose, or eAG. Health care providers can now report A1C results to patients using the same units (mg/dl or mmol/l) that patients see routinely in blood glucose measurements.

Estimated AG (eAG): was calculated by combining weighted results from at least 2 days of continuous glucose monitoring performed four times

References:
Nathan DM, Kuenen J, Borg R, Zheng H, Schoenfeld D, Heine RJ. Translating the A1C assay into estimated average glucose values. Diabetes Care 2008; 31(8):1473-8.
www.diabetes.co.uk
http://professional.diabetes.org/glucosecalculator.aspx Accessed : March 2014