Two purpose-built calculators for households, businesses, and professionals. Enter meter readings or appliance wattage — and get a beautifully formatted bill preview ready to download.
No data stored. No login required.
Enter previous & current meter readings with per-unit charges to generate a complete bill preview.
Add individual appliances with wattage and usage hours. Get per-appliance energy breakdown and total cost.
Choose the calculator that matches how you want to estimate your electricity cost — by meter reading or by individual appliance.
The classic approach — enter your previous and current meter readings, set your per-unit rate, and get a complete bill preview in seconds. Ideal for consumers who receive monthly readings from their utility provider.
| Description | Amount |
|---|---|
| Energy Charge (420 kWh) | ₹ 2,730.00 |
| Fixed Charge | ₹ 120.00 |
| Tax (9%) | ₹ 256.50 |
Don't have your meter readings? No problem. Add each of your appliances individually — enter wattage, quantity, daily usage hours, and days used. The tool calculates energy consumed per appliance and rolls it into a detailed bill.
| Appliance | Watts | Hrs | Days | kWh |
|---|---|---|---|---|
| Air Conditioner | 1500W | 8h | 30 | 360 kWh |
| Refrigerator | 150W | 24h | 30 | 108 kWh |
| LED Bulbs ×6 | 10W | 6h | 30 | 10.8 kWh |
Both tools are designed for zero learning curve. Follow these simple steps and have your bill estimate ready in under two minutes.
Check your electricity bill or utility meter card for the exact previous and current readings. The per-unit rate is usually printed on your monthly statement.
You can find the wattage of any appliance on its back label, user manual, or product page. Start with the three pre-loaded sample appliances to see how it works.
ElectroCalc serves anyone who needs a quick, professional electricity cost estimate — without official billing complexity.
Estimate monthly bills before they arrive. Understand which appliances are costing the most and plan your energy usage wisely.
Best with: Both ToolsCalculate electricity costs for your shop, office, or workshop. Break down consumption by equipment and manage overheads better.
Best with: Appliance ToolGenerate a clear, professional bill preview for client records or internal reporting. Download as PDF or Excel for easy filing.
Best with: Meter ToolUnderstand electricity billing mechanics practically. A great hands-on tool for physics, economics, or engineering coursework.
Best with: Both ToolsEstimate utility costs across multiple units. Use as a quick reference for tenancy cost calculations and rental pricing.
Best with: Meter ToolDemonstrate to clients how appliance load affects the monthly bill. Produce branded-looking estimate documents on the fly.
Best with: Appliance ToolThese tools are estimation and preview tools only. They are not intended to replace official billing systems issued by registered electricity utilities, government bodies, or licensed billing providers. The bills generated carry an explicit disclaimer and should not be used for legal, commercial, or regulatory purposes. Do not use for official tenant invoicing without appropriate professional advice.
No plugins. No extensions. No subscriptions. Every feature ships inside a single HTML file.
Every number updates instantly as you type. No submit buttons, no page reloads. The bill preview reflects your inputs in real time.
From INR to USD, EUR, GBP, AED, PKR, and more. Currency symbols appear automatically across the preview, PDF, and Excel export.
A4-formatted PDF with proper margins, gradient header, structured tables, and a disclaimer footer. Looks like an actual bill.
Structured spreadsheet with all consumer details, readings/appliance data, intermediate calculations, and final totals.
Red error borders appear on invalid fields instantly. Current reading can't be less than previous. Usage hours can't exceed 24.
Fully frontend — no server, no database, no cookies, no analytics tracking your inputs. Everything stays in your browser.
Works on phones, tablets, and desktops. Layouts adapt fluidly across all screen sizes without breaking functionality.
Use the Print button to send directly to your printer or save as PDF via your system's print dialog. Form is auto-hidden.
Bill number (unique random ID) and generation date are auto-filled. Billing month defaults to the current month automatically.
Not sure which calculator to use? This table will help you choose the right one for your situation.
| Feature / Criteria | ⚡ Meter-Based Tool | 🔌 Appliance Tool |
|---|---|---|
| Input Method | Previous & current meter readings (kWh) | Per-appliance wattage, hours, and days |
| Best For | Monthly billing estimation from meter data | Estimating before bills arrive; energy audits |
| Appliance Breakdown | Not included — total units only | Per-appliance kWh table |
| Meter Number Field | Included in bill | Not applicable |
| Currency Support | 15 currencies | 15 currencies |
| Fixed & Other Charges | Yes | Yes |
| Tax / Duty (%) | Yes | Yes |
| PDF Download (A4) | Yes | Yes, with appliance table |
| Excel Export | Yes | Yes, with intermediate calcs |
| Live Bill Preview | Yes | Yes |
| Requires Meter Reading? | Yes — required | No — not needed |
Electricity billing is surprisingly confusing for most people. Between unit calculations, tax layers, and fixed charges, even a simple monthly bill can be hard to verify or estimate in advance.
We built ElectroCalc as a clean, no-nonsense pair of tools that anyone can use — whether you're checking your utility bill for accuracy, planning a budget, or teaching someone how electricity billing works.
Everything runs locally in your browser. No accounts. No subscriptions. No data ever sent anywhere. Just open the file and use it.
Specialized calculation tools in one package
Currencies supported with correct symbols
Bytes of user data stored or transmitted
Export formats: PDF, Excel, and Print
Everything you might want to know about these tools, how they work, and when to use them.
No. These are estimation and preview tools only. All generated bills carry an explicit disclaimer: "This is a system-generated electricity bill preview for estimation purposes only." They should not be used as official utility bills or for any legal or regulatory purpose.
No. Both tools are 100% frontend — they run entirely in your browser with no backend server. Nothing you type is ever sent anywhere or stored. When you close the tab, all data is gone unless you've downloaded the PDF or Excel file.
Use the Meter-Based tool if you have your electricity meter readings (the numbers shown on your meter or utility bill). Use the Appliance-Based tool if you want to estimate your bill by listing your devices individually — useful for planning, audits, or if you don't have meter data yet.
The calculations are mathematically precise given your inputs. The accuracy of the estimate depends entirely on how accurate your inputs are — especially the per-unit rate, which varies by location and provider. Always cross-reference with your actual utility bill for real-world accuracy.
Yes. Both tools are fully responsive and work on mobile browsers, tablets, and desktops. The appliance table scrolls horizontally on small screens for a comfortable experience. PDF and Excel downloads also work on most modern mobile browsers.
Your per-unit rate is printed on your monthly electricity bill from your utility provider. It's usually labeled as "Energy Charge per kWh" or similar. In India it typically ranges from ₹4–9/kWh; in the US around $0.12–0.17/kWh; in the UK around £0.25–0.30/kWh — but these vary significantly by region and provider.
The wattage is usually printed on a label on the back or bottom of the appliance. It's also in the user manual or product specification page. Common examples: AC unit = 1000–2000W, refrigerator = 100–200W, LED bulb = 7–15W, washing machine = 500–1000W, TV = 50–200W.
Yes. Each row has a "Quantity" field — set it to 2, 3, or more to account for multiple identical devices. Alternatively you can add separate rows for different appliances of the same type if they have different usage hours.
Yes — the PDF is formatted as a proper A4 document with a dark gradient header, structured tables, consumer/bill info boxes, a highlighted total, and a disclaimer footer. It looks like a utility bill preview and can be shared for informal record-keeping or estimation discussions.
Yes, partially. The HTML files work offline — calculations, previews, and downloads all function without internet. However, the Google Fonts used for typography require an internet connection to load. The tools function correctly without fonts; they'll just fall back to system fonts.
Both tools are free, instant, and require no signup. Open, fill in, download. That's it.
Use your meter readings to generate a complete bill breakdown with consumer details.
Open Tool →List your appliances with wattage and usage time to estimate cost from the ground up.
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