Free electricity calculators

What do you want to calculate?

Choose a tool for electricity bills, power consumption, inverter and battery backup, solar, generators or wiring.

Core Calculator
Electrical & Load

Home Load Calculator

Calculate total connected load, typical operating wattage, and daily kWh units from an Indian appliance preset library.

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Tariff Orders
Cost & Tariffs

Electricity Bill & Slab Tariff

Estimate your monthly DISCOM bill with state tiered slab rates, sanctioned load fixed meter rent, and government subsidies.

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Flagship Wizard
Inverter & Backup

Complete Home Backup Planner

Personalized home backup planner connecting appliance load, inverter sizing and battery capacity with practical safety headroom.

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Core Calculator
Inverter & Backup

Inverter Size Calculator

Compute exact Inverter VA rating, system DC voltage (12V/24V/48V), and Pure Sine Wave recommendations with safety headroom.

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Core Calculator
Inverter & Backup

Battery Backup Time Calculator

Compute realistic backup hours considering Depth of Discharge (DoD), Peukert derating, and inverter conversion efficiency.

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WFH Essential
Inverter & Backup

Wi-Fi Router & WFH UPS Calculator

Calculate uninterrupted runtime for Wi-Fi routers, fiber ONT modems, and CCTV with 12V direct DC vs 230V AC desktop UPS.

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Durability
Inverter & Backup

Battery Life & Cycle Expectancy

Estimate how many years your inverter battery will survive based on Depth of Discharge (DoD) and Indian summer room temperatures.

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New • Home Planning
Electrical & Wiring

House Electrical Wiring Cost Calculator

Estimate room-wise electrical points, wire and conduit quantities, circuit counts, and a practical Indian home installation budget range.

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Planning Estimate
Electrical & Wiring

Cable Size & Voltage Drop Estimate

Compare estimated conductor voltage drop using current, length and material. Final cable suitability requires professional review of installation conditions and protection.

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Compliance
Electrical & Load

Sanctioned Load & MCB Check

Audit your connected appliances to avoid DISCOM Maximum Demand (MDI) penalties and size the main distribution MCB breaker.

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High ROI
Solar & Green Energy

Rooftop Solar & PM Surya Ghar

Size your rooftop solar plant (kW), panel counts, shadow-free roof area, PM Surya Ghar central subsidy, and payback period.

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Heavy Backup
Generators & Motors

Generator Sizing Calculator

Size prime and standby diesel or petrol generators to safely handle continuous running loads and motor starting inrushes.

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Fuel Math
Generators & Motors

Diesel Generator Running Cost

Estimate hourly and monthly diesel consumption (L/hr) and fuel costs, with direct economic comparison against inverter batteries.

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