Assumptions & About

Formulas

• Effective watts = 0 if OFF, otherwise the entered wattage
• Daily energy (kWh/day) = effective watts × runtime (h/day) ÷ 1,000
• Monthly energy (kWh/month) = effective watts × runtime × days per month ÷ 1,000
• Estimated monthly cost = monthly energy × tariff (৳/kWh)
• Estimated monthly CO₂ (kg CO₂/month) = monthly energy × emissions factor (kg CO₂/kWh)
• Energy saved = baseline monthly kWh − optimized monthly kWh; cost savings = baseline cost − optimized cost
• Reduction % = (baseline − optimized) ÷ baseline × 100 — shown as N/A when the baseline is zero

Model assumption

The model assumes the entered wattage applies for the entered runtime. For appliances with compressors or duty cycles (for example, a refrigerator), the entered runtime should be read as an effective full-power-equivalent runtime, and the result remains an approximation.

Limitations

• Real appliance consumption varies by model, age, operating conditions, duty cycles, temperature and behavior — the flat model does not capture these.
• Actual utility bills may include tiered rates, taxes, fixed charges, minimum charges and other adjustments that this simple flat-tariff estimate does not model.
• The default tariff of ৳10/kWh is an arithmetic example for illustration only — it is not a statement of your actual electricity tariff. Change it under the Dashboard's assumptions.
• The CO₂ factor is a user-configurable illustrative factor; no verified grid-emissions source is bundled with the app.
• Tips and goal progress are estimates, not guaranteed reductions or achievements.