Online Electricity Bill Calculator

Under the Tamil Nadu government (TANGEDCO) subsidy scheme, every domestic consumer receives the first 100 units 100% free of charge on their bi-monthly bill. If you consume 240 units in a 2-month cycle, the first 100 units are billed at ₹0.00. The next 100 units (101–200) are billed at the subsidized rate of ₹2.35 per unit, and the remaining 40 units (201–240) are billed at ₹4.70 per unit.

For consumption up to 500 units bi-monthly: 0–100 units is ₹0.00 (Free), 101–200 units is ₹2.35/unit, 201–400 units is ₹4.70/unit, and 401–500 units is ₹6.30/unit. When total consumption exceeds 500 units, the first 100 units remain free, but units 101–400 are charged at ₹4.80/unit, 401–500 at ₹6.30/unit, 501–600 at ₹8.40/unit, 601–800 at ₹9.45/unit, and above 800 units at ₹10.50–11.55/unit.

In Kerala (KSEB), domestic consumers using up to 250 units per month (500 units bi-monthly) enjoy telescopic billing, where each slab is billed progressively (0–50 units at ₹3.30, 51–100 at ₹4.15, 101–150 at ₹5.30, 151–200 at ₹7.10, and 201–250 at ₹8.40). If monthly consumption exceeds 250 units, telescopic benefit is revoked and all units are billed at a single flat non-telescopic rate (ranging from ₹6.60 to ₹9.30 per unit) plus a 10% statutory electricity duty.

Under Section 3 of the Kerala Electricity Duty Act, a statutory 10% electricity duty is levied on the total energy charges of low-tension domestic consumers. This duty is calculated strictly on energy charges (excluding fixed charges and meter rent) and remitted to the state government.

To calculate units consumed, subtract the previous meter reading from the current meter reading: Units (kWh) = Current Reading − Previous Reading. For example, if your current reading is 15,350 and previous reading was 15,100, your total consumption for that billing cycle is 250 units (kWh).

To calculate your electricity bill with a unit rate: multiply your consumed units by the tariff per unit, then add fixed meter charges and statutory tax. Formula: Total Bill = (Total Units × Rate per kWh) + Fixed Charges + (Energy Cost × Tax Percentage).

Electricity is billed in Kilowatt-hours (kWh), where 1 Unit = 1,000 Watt-hours. To calculate units: Units (kWh) = (Appliance Wattage × Daily Hours Used × Days) ÷ 1,000. For instance, running a 1,500W air conditioner for 8 hours daily over 30 days consumes (1500 × 8 × 30) ÷ 1,000 = 360 units.

In slab-based tariff structures without proportionate scaling, higher bi-monthly consumption can push units into higher priced tariff brackets. However, regulated utilities like TANGEDCO and KSEB calibrate their bi-monthly slabs to double the monthly thresholds (e.g., 50 units/month becomes 100 units bi-monthly) so domestic consumers are not penalized by the 60-day billing cycle.

Yes, you can use your smartphone as a ruler using an on-screen calibrated digital ruler web app or native augmented reality (AR) apps such as Apple Measure (iOS) or Google Measure / AR Ruler (Android). These utilize your screen pixel density (PPI) or camera sensors to provide accurate physical measurements.

Yes, online virtual rulers allow you to measure physical objects directly against your monitor or smartphone display. Virtual rulers calibrate to your screen's exact physical size using standard reference objects (such as a credit card or dollar bill) to render genuine millimeters, centimeters, and inches.

On a standard ruler, 1 inch (2.54 cm) is demarcated by the longest numbered tick mark. You can also visually estimate 1 inch using common everyday references: the distance from the top knuckle to the tip of your thumb is roughly 1 inch, a standard quarter coin is 0.955 inches across, and a credit card is approximately 3.37 inches wide by 2.125 inches tall.

To measure centimeters online, open a calibrated online ruler webpage. Place the physical object directly flush against the screen aligned at the 0 cm mark. Look at where the opposite edge of the object lands along the centimeter ruler markings, noting millimeters indicated by the intermediate tick marks.

Yes, modern smartphones can measure dimensions, distances, areas, and angles. They achieve this through screen-based digital rulers for small objects (up to 6 inches) and camera-based LiDAR or ARCore/ARKit depth-sensing technologies for measuring larger furniture, rooms, and wall dimensions.

Yes, camera ruler apps utilize computer vision and Augmented Reality (AR) to detect spatial planes and calculate real-world measurements between points you tap on the camera viewfinder. Devices equipped with LiDAR or Time-of-Flight (ToF) sensors achieve millimeter-level accuracy.

Yes, online measurement tools allow you to measure lengths, angles, screen pixels, and physical objects via your web browser. Most online measurement websites include automated calibration routines to match your display's native pixels-per-inch (PPI) for 1:1 real-world physical accuracy.

To read an online ruler: align the left edge of your item with the 0 mark on the virtual ruler. On the metric side, major numbers represent whole centimeters (cm) and small notches represent millimeters (mm). On the imperial side, large numbers represent inches, divided into 1/2, 1/4, 1/8, and 1/16 inch fractions.

To view the ruler in Microsoft Word Online (Word for the Web): click on the 'View' tab on the top ribbon navigation bar, and select or check the 'Ruler' checkbox in the Show group. Note that depending on browser view mode, switching from Reading View to Editing View will make the horizontal ruler visible.

To add or turn on the ruler in Microsoft Word Online: open your document, ensure you are in 'Editing' mode, navigate to the top ribbon, click the 'View' tab, and check the 'Ruler' box. A horizontal margin and tab-stop ruler will immediately appear above your document canvas.

In PowerPoint Online: navigate to the 'View' tab on the ribbon menu and check the 'Ruler' checkbox under the Show section. This activates both the horizontal and vertical rulers along the top and left margins of your slide to help align text boxes and graphic elements.

To use an online ruler: 1) Open the online ruler tool in your browser. 2) Calibrate your display by selecting your screen diagonal size or by dragging the on-screen slider until an on-screen credit card matches a physical card held to the screen. 3) Hold your item against the screen to read length in cm, mm, or inches.

In Word for the Web, go to the top ribbon bar, click 'View', and toggle 'Ruler' on. If the option is dimmed, ensure you are in 'Print Layout' or 'Editing' view rather than viewing the document in reader mode.

Using a ruler online requires calibration for physical accuracy. Choose your preferred units (inches or cm), calibrate screen scaling using a standard reference card, place your item directly against the glass display, and read the corresponding dimension mark.