Calculate Minimum Transformer, Maximum Wattage, Minimum Wire Gauge, and Maximum Distance.

It's the Ultimate Low Voltage Landscape Lighting Tool!

Landscape Lighting Calculator app is a collection of electrical calculators and tutorials that assist DIY and professional architectural and landscape lighting installers in creating a more efficient lighting system at lower installation costs while increasing long-term safety. The calculators are customized specifically for 12V – 24V low voltage electrical systems that are commonly used for LED and halogen outdoor lighting (with a focus on 15V for LED). They are also extremely effective at troubleshooting installation issues!

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Get the Landscape Lighting Calculator on Google Play   Get the Landscape Lighting Calculator on the App Store

Used by landscape lighting professionals worldwide for over three years!

Landscape Lighting Calculator includes:

Calculator: Minimum Transformer:

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The Minimum Transformer calculator helps you determine the Minimum Size of Transformer that you need for your landscape lighting system. To use this calculator, enter fields: VA or W, Length of Run, Voltage Tap, and Wire Gauge and click Calculate. Repeat this for each run you will use on the Transformer. The app will save each run as you enter it and keep a running total. The final calculation will be the total VA / W of your lighting system and the Minimum Transformer that is recommended. During entry of each run, the calculator verifies that the wire gauge and length of run you selected is capable of handling the VA / W entered, and notifies you of potential problems.

Calculator: Maximum Wattage (VA):

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The Maximum Wattage (Load) calculator helps in determining the Maximum VA / W you can put on a given Gauge Wire, Voltage Tap, and Length of Run. This calculator is helpful if you already have a certain gauge wire and want to know how many lights can be used on that run. Enter the distance you would like to run, the voltage used, and select the wire gauge from the drop down menu, and the calculator will tell you the Maximum VA or W available. We recommend following the Suggested VA or W, which gives a 10% lower number to ensure a problem free installation.

Calculator: Minimum Wire Gauge

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Calculate the Minimum Wire Gauge needed for a run based on: VA / W, Length of Run, and Voltage. If using LEDs, we recommend using the 15VAC tap. This will give you the most efficient landscape lighting system, as the higher voltage results in less loss over wire length. We also provide a result with a calculation based on a 10% higher load on the run. What this means is that the calculator returns a wire gauge that is capable of handling 10% more wattage than what was entered. This will give you some flexibility if you need to add 1 or 2 luminaires in the future (or increase the wattage of the existing luminaires).

Calculator: Maximum Distance:

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The Maximum Distance calculator determines how great a distance you can go with a given Wire Gauge, Voltage Tap, and VA / W. This formula is also helpful if you already have a certain gauge wire and want to know how far you can go with a given VA / W and voltage. Again, the calculator will supply a Suggested Maximum Distance reduced by 10% for a trouble-free system.

Tutorial: Create an Efficient Lighting Plan

This tutorial is a step by step guide to creating an organized lighting plan, including: where to locate the transformer, how to group lights for efficiency, and tips on how to future proof your landscape lighting system.

Tutorial: Wiring and Connections

In this tutorial you will learn wiring and connection basics, how to look up National Electrical Code installation requirements, and where to get more detailed information if you are curious.

Tutorial: VA vs W (Volt-Amperes vs Watts)

Learn the difference between VA and W, and how to use them in the calculators.