Engineering Calculator

LED Light Savings Calculator

Calculate saving when replacing tube lights or old bulbs with LED lights.

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LED Savings Check

Compare old lighting with LED upgrade and payback.

Live calculator

Fill what you know. If a value is unknown, keep the practical default and verify the nameplate later.

Old Light Wattage (W)

New LED Wattage (W)

Number of Lights

Hours Per Day

Electricity Rate (â‚¹/kWh)

Cost per LED (â‚¹)

Use this page to compare old lamps with LED lighting and check whether the replacement cost comes back quickly.

This is a preliminary planning estimate. For certified audits, use site measurement and nameplate readings.

Is this result exact?

It is an engineering estimate using user inputs. Exact result needs actual meter/nameplate data.

Can I use it for audit report?

Yes, as a preliminary calculation and supporting estimate.

LED upgrade is usually a fast-payback action when old bulbs run for many hours daily.

The result is a planning estimate. Use nameplate wattage, measured runtime and current tariff for professional-level accuracy.