GFR Calculators

Use these GFR calculators to estimate kidney function for adults and children.

GFR Calculator for Adults (for patients 18 and older)

In adults the best equation for estimating glomerular filtration rate (GFR) from serum creatinine is the Modification of Diet in Renal Disease (MDRD) Study equation. The original MDRD Study equation GFR Calculator is for use with routine creatinine methods. The IDMS-traceable MDRD Study equation GFR Calculator is for use with those methods that have been recalibrated to be traceable to IDMS.

GFR Calculator for Children

Currently the best equation for estimating glomerular filtration rate (GFR) from serum creatinine in children is the Schwartz equation.

PDA Version for Adults and Children

This PDA version includes adult (Original and IDMS-traceable) and children's calculators in conventional units for download on Palm and Windows Operating Systems.

Additional Resources

• Frequently Asked Questions About Estimated GFR Values
• Understanding GFR: A Guide for Patients