About Quantio

Quantio is a collection of fast, focused calculators that help you make everyday decisions about fitness and finance — from estimating your body composition and daily calorie needs to planning loan amortisation, mortgage payments, and salary breakdowns.

Every tool runs entirely in your browser: no accounts, no tracking pixels, no data leaving your device. The numbers are produced from transparent formulas you can inspect, so you can decide for yourself whether the result makes sense for your situation.

Editorial team & methodology

Every Quantio calculator is built from published, peer-reviewed formulas and reviewed by an editor before release. We state each formula's source on the calculator page itself.

Formula sources we rely on

• World Health Organization (WHO) — adult BMI classification
• Mifflin–St Jeor (1990) — basal metabolic rate equation
• Hodgdon & Beckett (1984) — US Navy body fat method
• International Society of Sports Nutrition (ISSN) — protein-intake position
• FAO/WHO/UNU — human energy and macronutrient requirements
• Consumer Financial Protection Bureau (CFPB) — mortgage and amortization guidance
• OECD — Taxing Wages (annual)

Quantio does not replace professional medical, dietary, or financial advice. Each calculator's disclaimer cites the authoritative source it follows. If you spot an error or have a methodology question, write to support@quantio.cc — we audit every report and update the calculator when a source changes.