LED Savings Calculator

Calculate your annual and 10-year energy savings when switching from incandescent or CFL bulbs to LED. Free, instant, no signup.

Formula: Annual saving = (old watts − new watts) ÷ 1000 × hours/day × 365 × price/kWh × bulbs

How to use the LED Savings Calculator

  1. Enter your values. Fill in the fields with your numbers.
  2. Calculate. Press Calculate to run the led savings calculator.
  3. Use the result. Copy the result or try a related tool next.

Why use our LED Savings Calculator

Instant results. Enter your figures and the led savings calculator returns an answer in seconds.
Free & private. Runs in your browser — no signup, and nothing is sent to a server.
Accurate. Uses standard formulas so you can rely on the numbers.

Free to use — premium coming soon

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About the LED Savings Calculator

The LED Savings Calculator shows how much money and electricity you save by swapping incandescent or halogen bulbs for LEDs. You enter how many bulbs you're replacing, the wattage of the old bulb and the new LED, how many hours a day the light runs, and your electricity rate per kilowatt-hour. It then returns the annual energy cost of each option, the difference between them, and how long it takes the LED's higher purchase price to pay for itself. It's built for households planning a lighting upgrade and for anyone trying to put a real dollar figure on "LED uses less power."

Reach for this tool whenever a bulb burns out or you're deciding whether a bulk LED replacement is worth the upfront cost. A single 60W incandescent left on for several hours a day is one of the few loads in a home you can cut by roughly 85% with a five-dollar part, so the math usually favors switching. The calculator is most useful for high-use fixtures: kitchens, living rooms, porch lights, and any bulb that runs all evening. It also helps when comparing two LED options, since a slightly lower-wattage bulb at the same brightness keeps trimming the bill year after year.

Under the hood the method is straightforward. Annual energy cost for one bulb equals (watts ÷ 1000) × hours per day × 365 × your rate per kWh. The calculator runs that for both the old bulb and the LED, multiplies by the number of bulbs, and subtracts to get yearly savings. Payback period is the LED's extra purchase cost divided by that annual saving. Because LEDs commonly last around 25,000 hours versus roughly 1,000 for an incandescent, the tool can also fold in avoided replacement bulbs, which adds to lifetime savings beyond the energy line alone.

Accuracy depends on the numbers you feed it, especially your electricity rate, which varies widely by region and time of year, and your real daily run-time, which people tend to overestimate. Treat the output as a solid planning estimate, not a billing guarantee. Brightness should be matched by lumens, not watts, so a 9W LED genuinely replaces a 60W incandescent at about 800 lumens. Everything is calculated in your browser; no inputs, rates, or results are sent to a server or stored, so you can model your whole house without sharing any personal energy data.

Frequently asked questions

How does the LED Savings Calculator work out my savings?

It calculates annual cost for each bulb as (watts ÷ 1000) × hours per day × 365 × your kWh rate, then subtracts the LED's cost from the old bulb's cost. Multiply by the number of bulbs and you get your yearly saving; dividing the LED's extra price by that figure gives the payback period.

What wattage LED replaces a 60W incandescent bulb?

A 9W LED producing about 800 lumens is the standard replacement for a 60W incandescent. Match bulbs by lumens (brightness), not watts, since wattage only measures power drawn, not light output.

How much can I realistically save by switching to LEDs?

Replacing one 60W incandescent with a 9W LED saves roughly 85% of that bulb's running cost. Switching around ten frequently used bulbs commonly cuts lighting costs by tens of dollars a year, with the exact figure driven by your electricity rate and daily hours of use.

How long until an LED bulb pays for itself?

For a high-use bulb, the extra purchase cost of an LED is typically recovered within a few months of energy savings. Lower-use bulbs take longer, but LEDs lasting around 25,000 hours still come out ahead over their lifetime.

What electricity rate should I enter?

Use the per-kilowatt-hour rate from your latest utility bill, including delivery or supply charges if they're billed per kWh. Rates vary a lot by location and season, so your own number gives a far more accurate result than any default.

From our blog

How to Calculate Your Daily Protein Target (and Actually Hit It)

By the Super Simple Digital Tools Team · Updated June 2026

Most people either guess at protein or default to the headline RDA number, and both lead to misses. The honest first step is choosing the right activity level. The 0.8 g/kg Recommended Dietary Allowance is a minimum to prevent deficiency in sedentary adults, not an optimal target for someone who lifts weights three times a week. Being truthful about your real activity, not your aspirational schedule, is what makes the calculator's output trustworthy.

Once you have your target, the next challenge is distribution. A daily figure like 120 grams is easier to reach when spread across the day rather than crammed into dinner. Splitting protein into three or four meals of roughly 25 to 40 grams each keeps muscle protein synthesis stimulated through the day and is far more achievable than a single huge serving. This also explains why breakfast matters: many people under-eat protein in the morning and then cannot catch up by evening.

Translating grams into food is where the plan becomes real. As rough anchors, a chicken breast holds around 30 to 40 grams, a large egg about 6, a cup of Greek yogurt roughly 20, a scoop of protein powder 20 to 25, and a cup of cooked lentils around 18. Knowing a handful of these values lets you assemble meals to your target quickly without weighing every ingredient or logging obsessively.

Plant-based eaters can hit the same numbers but should pay attention to variety. Combining sources such as legumes, soy, grains, nuts, and seeds across the day covers the full range of essential amino acids. Soy, in particular, is a complete protein, and tofu, tempeh, edamame, and lentils make reaching a higher target straightforward without animal products.

Finally, treat your calculated number as a hypothesis to test, not a rule carved in stone. Aim for it consistently for two to four weeks, then judge the results against how you recover, train, and feel. If you are constantly hungry, losing strength, or struggling to recover, nudge intake up within the recommended range. The calculator gives you a credible starting point; your own response over time fine-tunes it.

  • Set the activity level to match your real weekly routine, not your best week, so the target reflects how you actually train.
  • Divide your daily goal into three or four meals of about 25 to 40 grams each rather than backloading protein at dinner.
  • Memorize the protein content of five staples you eat often so you can build meals to your target without constant tracking.
  • Recalculate after a meaningful weight change, since a target tied to body weight drifts as you gain or lose pounds.

Read the full guide →

Tool by the Super Simple Digital Tools Team. Reviewed by our editorial team. Free to use, no signup required.

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