Professional Chronological Age Calculator
Trusted Alternative to Pearson's Discontinued Calculator
Medical-grade accuracy for Speech Therapists, School Psychologists, and Assessment Professionals. Calculate precise chronological age in professional formats with the reliability you need for evaluations, IEP reports, and standardized assessments.
Trusted by professionals in:
Important Notice: Since Pearson discontinued their age calculator, thousands of professionals have switched to our reliable alternative.Learn about the transition →
Professional Age Calculator
Standard chronological age calculation
Please select the birth date
Calculate age as of this specific date
Ready to Calculate
Enter birth date and assessment date to calculate chronological age with professional accuracy
Professional-Grade Features
Built specifically for healthcare professionals, educators, and assessment specialists who require the highest levels of accuracy and reliability in their work.
Medical-Grade Accuracy
Precise calculations for professional assessments
Professional Formats
Y;M;D output ready for reports and evaluations
Privacy & Security
All calculations performed locally in your browser
Mobile Optimized
Works seamlessly on all devices for field assessments
How to Use for Professional Assessments
Step-by-step guidance for different professional scenarios and assessment requirements
Choose Your Mode
Select the calculator mode that matches your professional needs or use general mode for basic calculations.
Enter Dates
Input the birth date and assessment/calculation date. Use assessment date for professional evaluations.
Get Results
Receive precise chronological age in the appropriate format for your professional requirements.
Use in Reports
Copy or export results directly into your evaluation reports, IEPs, or assessment documentation.
For Speech Therapists
Calculate precise chronological age for speech and language assessments
Professional Tip:
Use evaluation date for standardized assessments to ensure accurate norm-referenced scoring
Step-by-Step Process:
Select 'Speech Therapy' mode from the calculator
Enter child's birth date and evaluation date
Choose your assessment tool (CELF-5, PPVT-5, etc.)
Get age in SLP report format for norm comparisons
Copy result directly to your evaluation report
For School Psychologists
Essential for psychoeducational evaluations and IEP assessments
Professional Tip:
Consider grade-level expectations and developmental norms when interpreting results
Step-by-Step Process:
Select 'School Psychology' mode
Input student's birth date and testing date
Choose evaluation type (Initial, Re-evaluation, etc.)
Review age-grade appropriateness analysis
Export formatted result for evaluation reports
For Assessment Professionals
Standardized testing and clinical evaluation support
Professional Tip:
Y;M;D format meets most standardized test administration requirements
Step-by-Step Process:
Use 'Professional Assessment' mode
Enter precise birth and assessment dates
Select appropriate output format (Y;M;D standard)
Verify calculation meets testing requirements
Integrate with your assessment protocol
Professional Best Practices
Essential guidelines for accurate and reliable age calculations in professional settings
Documentation Standards
Always document the exact dates used for age calculation in your reports. Include both birth date and assessment date for transparency.
Verification Process
Double-check critical calculations, especially for eligibility determinations. Consider having a colleague verify important age calculations.
Quality Assurance
Use consistent calculation methods across all assessments. Maintain records of calculation methods for audit purposes.
Ready to Start Professional Calculations?
Join thousands of professionals who trust our calculator for their assessment needs
Start Calculating NowTrusted by Professionals Nationwide
See what assessment professionals are saying about our chronological age calculator
"Essential for my CELF-5 and PPVT-5 assessments. Saves hours each week."
"Perfect Y;M;D format for IEP reports. Meets all our district standards."
"Standardized across all our assessment teams. Reliable and fast."
Frequently Asked Questions
Professional answers to common questions about chronological age calculations
Our calculator provides medical-grade accuracy, correctly handling leap years and varying month lengths.