| Category | Pages | Specialisation |
|---|
| Finance | 39 calculators | EMI, SIP, income tax, GST, mortgage, investment, salary, debt payoff |
| Health | 21 calculators | BMI, TDEE, calorie needs, macros, body fat — per WHO & ICMR guidelines |
| Mathematics | 27 calculators | Percentage, statistics, algebra, geometry, GPA, fractions |
| Converters, Tools & Date-Time | 23 calculators | Unit conversion, date/time, productivity tools, electricity, grading |
Every calculator passes through a 4-step review before publication:
- Formula sourcing — traced to a primary source: RBI, CBIC, Income Tax Act 1961, WHO, ICMR, or ISO 80000. No formula is published without a verifiable reference.
- Output testing — tested against 5+ known input/output pairs including edge cases. Cross-checked against official government calculators (incometax.gov.in, gst.gov.in, EPFO portal).
- Content depth review — checked for formula accuracy, worked examples, FAQ quality, and India-specific context.
- Regulatory currency — finance pages updated immediately after CBIC, CBDT, or EPFO announcements. Health pages updated when WHO/ICMR revise guidelines.
See: Calculation Methodology · Editorial Policy
What qualifications does Mayra hold?
Mayra holds an MBA in Finance (specialisation: corporate finance & investment analysis), a BSc in Mathematics, and is NISM Series V-A certified — the National Institute of Securities Markets certification for mutual fund distribution and financial advisory. She has 8+ years in financial modelling, personal tax planning, and investment research.
How does Mayra verify calculator accuracy?
Each formula is traced to a primary source (RBI, CBIC, WHO, ICMR, ISO). Outputs are tested against at least five known input/output pairs including edge cases. Finance calculators are cross-checked against official government portals where available.
How can I report a calculator error?
Email hello@icalcapp.com with the calculator URL, your inputs, the result shown, and the expected result with your source. All reports are reviewed within 48 business hours.
Does Mayra also review health calculators?
Yes. Health calculators are reviewed by Mayra for content accuracy and additionally by Dr. P Nair, MBBS, MD (Community Medicine) for medical accuracy. All health calculators include a disclaimer that results are for informational purposes only.
Profile last reviewed: June 2026 · Contact Mayra
What does Mayra review on iCalcApp?
Mayra personally reviews every calculator and guide published on iCalcApp — all 110 calculators and 37 blog guides as of June 2026. Her review covers four layers: the underlying formula against its primary source, the JavaScript implementation against hand-computed test cases, the written explanation for accuracy and clarity, and the worked examples against current Indian rates, slabs, and rules.
Review scope by category
Finance (her core domain): EMI and loan mathematics, compound interest, SIP/lumpsum projections, India tax calculations (income tax slabs, GST rates, HRA exemption under Section 10(13A), gratuity under the 1972 Act), and retirement instruments (PPF, EPF, NPS) — verified against Income Tax Act provisions, CBIC notifications, EPFO circulars, and RBI data. Health: formulas verified against the published equations (Mifflin-St Jeor, Harris-Benedict, Navy body fat, Naegele’s rule) and WHO/ICMR reference ranges; health outputs are educational, not medical advice. Math & conversions: checked against ISO/NIST definitions and standard mathematical references.
What is the review process?
Each page goes through: (1) formula sourcing — every equation traced to a statute, regulator publication, or peer-reviewed source listed on the methodology page; (2) implementation testing — minimum three test vectors per calculator including edge cases; (3) editorial pass for clarity following the editorial policy; and (4) periodic re-review — finance pages each April after Budget changes take effect, health pages when guidelines change, with the “Last reviewed” date updated on the page.
Credentials and certifications
MBA in Finance — coursework in corporate finance, taxation, and investment analysis. BSc Mathematics — foundation for the formula verification work across math and statistics tools. NISM certification — National Institute of Securities Markets certification covering Indian securities regulation and investor protection norms. Mayra’s combination of finance domain knowledge and mathematical training is the basis of iCalcApp’s formula-first accuracy standard.
Corrections and contact
Found an error? Every page footer links to the contact page — verified corrections ship within 48 hours and material fixes are noted on the affected page. This corrections commitment is part of the site’s editorial policy.
