Methodology

Tools state their assumptions, limitations and sources where available. Automated formula tests do not constitute medical or legal review.

• Loans: fixed payments, monthly rate = nominal annual rate / 12.
• Savings: end-of-month contributions.
• BMI: kg / meters squared, adult classification for ages 20+.
• BMR: Mifflin–St Jeor; TDEE factors are estimates.
• Pregnancy: LMP + 280 days adjusted for cycle length, conception + 266 days, or supplied gestational age at ultrasound.
• Zakat: conditional estimate based on selected nisab, lunar year and inputs; disputed rulings are not decided.
• Inheritance: checklist until a specialist distribution engine is approved.
• Service benefits and net salary: user-supplied factors and deductions, without claims of country-law compliance.