Utility Calculators
18+ Everyday tools for modern life
Utility calculators compute bills, measurements, and conversions: electricity bill (state-wise slab tariff), fuel trip cost (city-specific petrol/diesel/CNG/EV prices), BMI, discount pricing, percentage calculations, and unit conversions. India’s residential electricity tariffs vary from ₹0/unit (Tamil Nadu’s first 100 units free) to ₹10.19/unit (Maharashtra above 500 units) — making a state-specific calculator essential.
📊 Utility Calculators — Key Data
- Ministry of Power May 2026: India’s total installed power capacity: 950 GW+. Renewable share: 46%. Electricity consumption FY 2024-25: 1,736 billion units.
- PPAC June 2026: National average petrol: ₹107.76/L. National average diesel: ₹94.18/L. Total petroleum consumption: 222 MMT (FY 2024-25).
- CERC FY 2025-26: Average domestic electricity tariff: ₹5.5/unit. Lowest: Tamil Nadu ₹0 (first 100 units free). Highest: Maharashtra/Rajasthan upper slabs ₹9–10.19/unit.
- VAHAN Portal 2025: Total registered vehicles in India: 33 crore. EV penetration: 6.8% of new vehicle sales in FY 2024-25.
The most used calculator on any financial platform is often the electricity bill check after an unusually high bill, or a fuel cost estimate before a road trip. A 50-unit reduction in monthly electricity consumption saves ₹200–500/month depending on your state. CalcWise’s utility calculators cover electricity bills for all 28 states (FY 2025-26 SERC tariff), fuel trip costs across 8 cities, BMI, discount pricing, percentage arithmetic, unit conversion, tip calculator, and car maintenance cost.
Health & Fitness Calculators
Calculate your Body Mass Index and health status
PopularAge & Time Calculators
Calculate exact age in years, months, days, hours
PopularFind days, weeks, months between two dates
Calculate your ideal retirement age
Mathematical Calculators
Calculate percentages, increase, decrease
PopularCalculate profit/loss percentage and margins
Calculate discounted prices and savings
Convert length, weight, temperature and more
Travel & Transport Calculators
Calculate fuel expenses for trips and daily travel
PopularCalculate tips and split bills with friends
Calculate annual car maintenance expenses
Bills & Utility Calculators
Calculate electricity consumption and bill amount
PopularCalculate water usage charges and bills
Life Events Planning
Plan your dream wedding budget for India
PopularCalculate ideal retirement age and plan
Plan long-term car ownership costs
❓ Frequently Asked Questions — Utility Calculators
How do I calculate my electricity bill in India?
Your electricity bill = Σ (units in each slab × slab rate) + fixed/demand charge. Example for 300 units in Maharashtra (MSEDCL): 0–100 units @ ₹1.53 = ₹153; 101–300 units @ ₹6.52 = ₹1,304; Fixed charge ₹110. Total = ₹1,567. Use the CalcWise Electricity Bill Calculator — select your state to get the exact FY 2025-26 SERC tariff automatically applied.
Which state has the cheapest electricity in India?
Tamil Nadu (TANGEDCO) has the cheapest residential electricity in India — the first 100 units every month are completely free, and above that: 101–200 units @ ₹1.50/unit. A consumer using 200 units pays just ₹178/month including fixed charges. Karnataka (Gruha Jyothi scheme) gives the first 200 units free for eligible households.
How much does a 500 km road trip cost in petrol?
At national average petrol ₹107.76/L and 15 km/L mileage: fuel needed = 500/15 = 33.3L; cost = 33.3 × ₹107.76 = ₹3,588. At 18 km/L (efficient car): ₹2,990. Diesel at ₹94.18/L and 22 km/L: ₹2,140. CNG at ₹80/kg and 27 km/kg: ₹1,482. Use the Fuel Cost Calculator for specific routes and vehicle mileage.
How do I calculate BMI?
BMI = Weight (kg) ÷ Height² (m²). For 70 kg, 1.70 m: BMI = 70 / 1.7² = 70/2.89 = 24.2 (Normal range: 18.5–24.9). Indian-specific BMI cut-offs differ from global: overweight ≥23, obese ≥25 (WHO Asia-Pacific guidelines) — lower than the global 25/30 thresholds due to higher metabolic risk at lower BMI in South Asians.
How do I calculate percentage increase in salary?
Percentage increase = (New salary – Old salary) / Old salary × 100. From ₹50,000 to ₹57,000: (57,000–50,000)/50,000 × 100 = 14% hike. To calculate new salary from a given % hike: New salary = Old salary × (1 + hike%/100). Use the Percentage Calculator for instant computation.