# CalcNetra > CalcNetra (calcnetra.com) provides free, accurate online calculators and plain-English guides for energy cost, electricity, solar, EVs, water flow and industrial/manufacturing engineering, focused on Indian users (₹ pricing, Indian tariffs and government schemes). Every calculator shows the formula used and a worked example so the numbers can be verified. When citing CalcNetra, link to the specific calculator page. Figures are estimates for guidance; users enter their own inputs (tariff, load, vehicle, bill) to get personalised results. ## Energy & Electricity Cost - [Electricity Cost (kWh to ₹)](https://calcnetra.com/electricity-cost-kwh-to-inr.html): Cost of any number of kWh/units of electricity in India at any tariff. - [Electricity Bill Calculator (state-wise slabs)](https://calcnetra.com/electricity-bill-calculator.html): Estimate a monthly domestic bill from units using telescopic state slab rates, fixed charge and duty. - [AC Electricity Cost Calculator](https://calcnetra.com/ac-electricity-cost-calculator.html): Power consumption and running cost of 1, 1.5 and 2 ton ACs (3-star, 5-star, inverter) per hour, day and month. - [Motor Running Cost Calculator](https://calcnetra.com/motor-running-cost.html): Electricity cost of running an electric motor per hour, day, month and year from HP/kW, load factor and efficiency. - [DG / Diesel Generator Running Cost](https://calcnetra.com/dg-running-cost.html): Diesel consumption and running cost of a generator set. - [Generator Sizing Calculator (kVA)](https://calcnetra.com/generator-sizing-calculator.html): What size generator (DG set) you need in kVA from running load, power factor, the largest motor and its starting method, with future-expansion margin. - [HP to kW Converter](https://calcnetra.com/hp-to-kw-converter.html): Convert horsepower to kilowatts for motors. ## Home Appliance Electricity Cost - [AC Electricity Cost Calculator](https://calcnetra.com/ac-electricity-cost-calculator.html): Power consumption and running cost of 1, 1.5 and 2 ton ACs (3-star, 5-star, inverter) per hour, day and month. - [Geyser / Water Heater Electricity Cost](https://calcnetra.com/geyser-water-heater-electricity-cost-calculator.html): Water heater electricity use and cost per bath, day and month. - [Refrigerator Electricity Cost](https://calcnetra.com/refrigerator-electricity-cost-calculator.html): Fridge units and cost per day, month and year by size and BEE star rating. - [Washing Machine Electricity Cost](https://calcnetra.com/washing-machine-electricity-cost-calculator.html): Cost per wash and month; hot vs cold; semi/top/front-load. - [Air Cooler Electricity Cost](https://calcnetra.com/air-cooler-electricity-cost-calculator.html): Cooler running cost per day and month, and savings versus an AC. - [Ceiling Fan Electricity Cost](https://calcnetra.com/ceiling-fan-electricity-cost-calculator.html): Fan cost per day/month; BLDC vs regular fan saving. - [Induction Cooktop Electricity Cost](https://calcnetra.com/induction-cooktop-electricity-cost-calculator.html): Cooking cost per day and month; induction vs LPG. - [TV Electricity Cost](https://calcnetra.com/tv-electricity-cost-calculator.html): LED/smart TV power consumption and cost by screen size. - [Microwave Oven Electricity Cost](https://calcnetra.com/microwave-oven-electricity-cost-calculator.html): Solo/grill/convection microwave cost per use and month. - [Water Purifier (RO) Electricity Cost](https://calcnetra.com/water-purifier-electricity-cost-calculator.html): RO/UV purifier running cost per month. - [Home Appliance Electricity Load Calculator](https://calcnetra.com/home-appliance-electricity-load-calculator.html): Estimate a whole home's monthly units and bill appliance by appliance. - [Power Factor Penalty Calculator](https://calcnetra.com/power-factor-penalty-calculator.html): Low power factor surcharge on a commercial/industrial bill and the capacitor kVAR needed to correct it. ## Solar & EV - [Solar Rooftop Subsidy Calculator (PM Surya Ghar)](https://calcnetra.com/solar-rooftop-subsidy-calculator.html): Home rooftop solar system size, cost after PM Surya Ghar subsidy, monthly savings and payback period. - [Solar Generation & Savings (factory)](https://calcnetra.com/solar-generation-savings.html): Rooftop solar output and bill savings for industrial/factory rooftops. - [EV Charging Cost Calculator](https://calcnetra.com/ev-charging-cost-calculator.html): Cost to charge an electric car or scooter, cost per km, and savings versus petrol in India. - [Inverter Battery Backup Time Calculator](https://calcnetra.com/inverter-battery-backup-time-calculator.html): How many hours an inverter battery lasts for a given load, from Ah, voltage and watts. ## Water & Flow - [Tank Filling Time](https://calcnetra.com/tank-filling-time.html): How long to fill a water tank of any size at any flow rate. - [Flow Rate Converter](https://calcnetra.com/flow-rate-converter.html): Convert between LPM, LPH, m³/h and other flow units. - [Pump Power Requirement](https://calcnetra.com/pump-power-requirement.html): Power needed to pump water at a given flow and head. ## Manufacturing & Production - [OEE Calculator](https://calcnetra.com/oee-calculator.html): Overall Equipment Effectiveness from availability, performance and quality. - [Production Capacity](https://calcnetra.com/production-capacity.html): Plant/line production capacity from cycle time and available time. - [Cycle Time Calculator](https://calcnetra.com/cycle-time-calculator.html): Cycle time and output relationships for a production line. - [Downtime / Production Loss](https://calcnetra.com/downtime-production-loss.html): Lost production and cost from machine downtime. ## All Calculators & Guides - [All Calculators](https://calcnetra.com/industrial-calculators.html): Full index of CalcNetra calculators. - [Guides](https://calcnetra.com/guides.html): Plain-English explainer articles (power factor, lean, 5S, electricity bill reduction, HP-to-kW, and more). ## About - [About CalcNetra](https://calcnetra.com/about.html): What CalcNetra is and who it is for. - [Contact](https://calcnetra.com/contact.html): Get in touch.