Calculation Methodology

This page documents how Tooler calculators generate output so users can verify assumptions before using results in financial, health, or compliance workflows.

Core rules

Inputs are required unless marked optional.
Results are rounded for readability but computed with floating-point arithmetic.
Displayed values are estimates unless explicitly formula-exact.

Key formulas used

BMI: weight (kg) ÷ height² (m²)
EMI: reducing-balance formula using monthly rate
GST add/remove: direct percentage and reverse-tax arithmetic
Calories: Mifflin-St Jeor BMR with activity multiplier (TDEE)

Validation and limits

Text-to-ASCII includes character and line limits to preserve usability. File tools enforce upload limits and MIME checks. Invalid input returns explicit errors rather than silent fallbacks.