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Umar Malik is the founder, site operator, and editor of CalcRange. He maintains the site’s calculator library, publishes explanatory guides, reviews reported calculation problems, and coordinates updates across finance, health, education, construction, date, travel, and everyday-math topics.
Profile last reviewed: September 3, 2026.
Role at CalcRange
- Define calculator requirements, inputs, outputs, formulas, and rounding behavior.
- Check worked examples and public calculator results.
- Review sources and add limitations to higher-impact topics.
- Maintain internal links, page metadata, structured data, and accessibility text.
- Investigate reader corrections and update pages when an error is confirmed.
Scope and qualifications
Umar is a web publisher and calculator-site operator. He is not presented as a physician, registered dietitian, lawyer, accountant, engineer, financial adviser, government official, or religious authority. CalcRange pages explain general formulas and publicly available guidance; they do not create a professional-client relationship.
Review approach
For calculation pages, Umar checks the displayed formula, representative examples, units, rounding, and obvious edge cases. For editorial pages, he prefers government, standards-body, university, peer-reviewed, or established professional sources where the subject requires them. When a question depends on location, policy, or personal circumstances, the page should say so instead of presenting one number as universal.
Corrections and contact
If you find an incorrect result or unsupported claim, email support@calcrange.com. Include the page URL and the exact inputs or statement involved. You can also use the Contact page.
Read more about the site’s standards in the Editorial Policy and About CalcRange.