Author
Sandeep
Researcher and writer behind ChronologicAgeCalc’s free age calculators and guides.
14 articles & toolsAge & testing calculatorsChild development
About Sandeep
Sandeep is a researcher and writer who builds free health and education calculators. Sandeep started this site to give parents, teachers and clinicians simple tools that show their working, so every age, score or estimate can be checked rather than taken on trust.
Sandeep builds online calculators and writes about age, health and education topics, with a focus on clear, checkable methods. Every page explains how its numbers are worked out, so readers can see exactly where a result comes from.
How Sandeep Writes and Checks Content
- Published methods only: calculators use standard formulas, such as the borrowing method for chronological age and the PhenoAge equation for biological age.
- Trusted sources: health and testing facts are checked against sources such as the CDC, AAP, WHO, test publishers and peer-reviewed research.
- Worked examples: every example on the site is calculated and double-checked before publishing.
- Regular updates: pages are reviewed and improved when guidance or data changes.
Read more on the methodology and editorial policy pages, or get in touch through the contact page.
Articles & Tools by Sandeep
ToolsChronological Age CalculatorExact age in years, months and days for tests and forms.ToolsCorrected Age CalculatorAdjusted age for babies born before 37 weeks.ToolsAge in Months CalculatorHow many months old a baby, child or adult is.ToolsSchool Age CalculatorWhen a child can start kindergarten, and their grade.ToolsAge Difference CalculatorThe exact age gap between two people.ToolsBiological Age CalculatorPhenoAge from nine routine blood test results.ToolsMental Age CalculatorConvert between IQ, mental age and real age.TestingPearson Age Calculator AlternativeChronological age for testing with rounding and working.TestingSuper Duper Age Calculator AlternativeA free age calculator for speech-language evaluations.TestingBrigance Age CalculatorAge and screen form for Brigance screening.TestingTest Age RangesWISC-V, WPPSI-IV, CELF-5, PLS-5 and more in one chart.GuidesWhat Is Chronological Age?Definition, meaning, examples and psychology.GuidesHow to Calculate Chronological AgeStep-by-step method with examples and practice.GuidesChronological Age vs Biological AgeHow each is measured and why they differ.