Off-grid calculators
Free calculators for off-grid land planning. No signup, no email gate — punch in your numbers, get your answer. Built for the same off-grid math Plotnode handles in 3D once you upload a drone mesh of your property.
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Off-grid solar sizing calculator
Estimate the array watts + battery bank you need to cover your off-grid daily load with the autonomy you want.
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Battery autonomy calculator
How many days your battery bank will carry your daily load if the sun never shines.
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Rainwater catchment calculator
Roof × annual rainfall × 0.623 collection factor = gallons per year you can legally harvest in AZ.
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Cistern sizing calculator
Size your storage tank from household × gallons-per-day × autonomy days.
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Septic perc + sizing calculator (AZ ADEQ Type 4)
Estimate septic tank size + leach field area from bedrooms and percolation test rate. AZ ADEQ Type 4 spec.
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Driveway cut/fill calculator
Cubic-yard estimate for grading a rural driveway. Plug in length, width, elevation gain, and target grade.
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Cabin build cost calculator
Parametric estimate from square footage, finish level, and regional cost index.
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Solar panel tilt calculator
Optimal fixed tilt for an off-grid solar array. Annual = latitude; winter = latitude + 15°; summer = latitude − 15°.
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Solar elevation + azimuth calculator
Sun position, sunrise, sunset, solar noon for any date and location. Useful for shading studies and panel placement.
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