What Can You Calculate Here?
Every calculator on this site shows the math behind the result — not just a number. Here are the most popular calculations Indian users run:
⚡ EV Charging Costs
EV Charging Cost Calculator — A Tata Nexon EV (30.2 kWh) costs about ₹180-250 to fully charge at home in Maharashtra at ₹8/kWh. At a public DC fast charger, the same charge costs ₹600+. See exact costs for your EV model and state.
EV vs Petrol Comparison — At 1,200 km/month, an EV saves about ₹7,000/month (₹84,000/year) versus petrol at ₹104/litre. Over 5 years, that's ₹4.3 lakh in running cost savings — enough to offset most of the EV purchase premium.
☀️ Solar Panel ROI
PM Surya Ghar Subsidy Calculator — The central subsidy is ₹30,000/kW for the first 2 kW and ₹18,000 for the 3rd kW, capped at ₹78,000. A 3 kW system is the sweet spot — it captures the full subsidy. The 4th kW and above get zero additional subsidy.
Solar ROI Calculator — A 3 kW system costs ₹72,000 after subsidy (MNRE benchmark ₹50,000/kW), generates 4,860 units/year, and returns ₹9.7 lakh over 25 years — a 13x return on your out-of-pocket investment.
Panel Size Calculator — A ₹3,000/month electricity bill at ₹8/unit needs a 3 kW system (6 panels at 540W each, ~300 sqft of roof). Peak sun hours vary by state — Rajasthan gets 5.0, Kerala 3.8.
🏗️ Construction Costs
House Construction Cost — A 1000 sqft G+1 house (2000 sqft total) at standard quality costs about ₹30 lakh in Tier-2 cities and ₹39 lakh in Mumbai. Rates range from ₹1,200/sqft (basic) to ₹2,500/sqft (premium), adjusted by city.
Brick Calculator — A 4.5" wall needs 6 bricks per sqft; a 9" wall needs 12. A 40×10 ft wall at 4.5" needs about 2,520 bricks and 6 cement bags, costing roughly ₹25,000 at ₹9/brick.
Cement Calculator — 100 cft of M20 concrete (the residential standard per IS 456:2000) needs 16 cement bags, 45 cft sand, and 90 cft aggregate. M20 uses a 1:1.5:3 mix ratio.
How These Calculators Work
Each calculator on this site follows the same approach:
- You enter your numbers — your electricity bill, your EV model, your wall dimensions, your city. No login required.
- The calculator runs the math in your browser — JavaScript computes the result using published formulas (IS 456:2000 for concrete, MNRE benchmarks for solar, ARAI ratings for EV range). Your inputs never leave your device.
- You see the worked computation — every result page shows the step-by-step math, the assumptions used, and the source of each figure. No black-box outputs.
- You get a decision framework — each page includes an if/then guide (which size to pick, whether to switch, when to act) and a 2-minute self-check to verify the numbers against your real situation.
All figures are sourced from government portals (pmsuryaghar.gov.in, MNRE guidelines, state ERC orders) and Indian Standards (IS 456, IS 1786, IS 1077). We update data as new rates are published, but always verify current prices with your local supplier or the relevant portal before making financial decisions.
Why These Calculators Are Free
Most calculator sites in India are run by solar installers, EV dealers, or construction companies — the calculator is a lead-generation tool designed to capture your phone number and sell you something. We're not. EVSolarCalculator.online has no installer partnerships, no lead capture, and no login requirement.
We built this because the existing calculators either (a) hide the math and show a marketing result, (b) require your contact details before showing anything, or (c) use generic formulas that don't account for India-specific rates, subsidies, and standards. Every page here shows the full computation, cites the source of every figure, and lets you adjust the inputs to match your actual situation.
The site is supported by display advertising (Google AdSense), not by selling your data or capturing leads. Your calculator inputs are processed entirely in your browser — we don't see them, store them, or share them. See our Privacy Policy for details.
Limitations & Verification
These calculators produce estimates, not quotes. Here's what they cannot know and where you should verify:
- Electricity rates change by slab and DISCOM. We use state averages. Your actual rate may be higher or lower depending on your monthly consumption and local tariff order. Verify on your electricity bill.
- Material prices fluctuate monthly. Our city-wise prices are indicative. Cement, steel, and brick prices can swing 5-10% in a quarter. Get current quotes from 2-3 local suppliers.
- Solar generation depends on your roof. Shading, orientation, and tilt affect output by 10-20%. Our estimates use 4.5 peak sun hours (India average) and 85% system efficiency — your actual yield may differ.
- EV range depends on your driving. Speed, AC use, terrain, and temperature all reduce range. The ARAI figure is a controlled test; expect 70-80% in real conditions.
- Subsidy rules can change. The PM Surya Ghar structure (₹78,000 cap) is current as of June 2026. Always verify at pmsuryaghar.gov.in before signing an installer contract.
- Do not enter private information. No calculator on this site asks for your name, phone, or address. All computation runs in your browser. If a calculator appears to request personal data, it's not ours.
For any financial decision, consult a qualified professional — a structural engineer for construction, a solar installer for rooftop solar, or a financial advisor for EV purchase decisions. See our disclaimer for full details.
Editor Note
Reviewed June 2026. All calculator figures are sourced from government portals (pmsuryaghar.gov.in, MNRE guidelines, state ERC tariff orders) and Indian Standards (IS 456:2000, IS 1786, IS 1077). Electricity rates, material prices, and subsidy structures are updated as new notifications are published, but rates change frequently across 28 states and 20 cities. If you spot an outdated figure or incorrect calculator output, please contact us with the page URL, the incorrect figure, and your source for the correct value.