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Weather & Environment tool map

More weather tools

Additional weather and environmental estimates.

Choose the tool whose inputs and output match your task. Check each calculator’s assumptions and limitations before using its result.

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These tools estimate energy and environmental quantities from measurements you can take yourself. Start with the solar panel calculator, which turns panel area and nameplate rating into low and high annual energy scenarios. The wind power calculator shows theoretical wind power from air density, swept area, wind speed, and turbine efficiency. Pool or pond owners can use the evaporation rate calculator to estimate water loss from temperature, humidity, wind, and surface area. Indoor gardeners can convert measured light into a daily light integral for a documented growing scenario. Find related sun, rain, and temperature tools in the Weather & Environment collection.

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Frequently asked questions

What does the Evaporation Rate Calculator estimate?
It estimates open-water loss from air temperature, water temperature, relative humidity, wind speed, and surface area. The output includes liters per hour, gallons per day, and an indicated depth loss. It is a weather-based estimate, not a leak test or water-balance audit.
Why does humidity reduce evaporation?
Evaporation slows when the air already contains a lot of water vapor. The calculator estimates saturation vapor pressure at the water surface, estimates actual vapor pressure from air temperature and relative humidity, and uses the difference as the driving force for evaporation.
Why does wind speed increase water loss?
Wind removes humid air sitting just above the water and replaces it with drier air. That maintains a vapor pressure difference at the surface. The calculator therefore multiplies the vapor pressure deficit by an effective wind speed term, with a small minimum wind speed.

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Related comparisons

All Weather & Environment comparisons →
Daylight Hours vs Solar Panel CalculatorCompare the daylight hours and solar panel calculators: one estimates geometric day length from latitude and date, the other turns panel area and specific yield into annual energy scenarios.Dew Point vs Evaporation Rate CalculatorCompare dew point and evaporation rate: one measures the actual water vapor content of the air, the other estimates how fast open water is lost — and how the vapor pressure deficit links them.Evaporation Rate vs Rainwater HarvestingCompare the two outdoor water-volume calculators: open-water loss from temperature, humidity, wind, and surface area versus roof runoff capture from area, rainfall, and collection efficiency.Evaporation Rate vs Relative Humidity CalculatorCompare the evaporation rate calculator and the relative humidity calculator: one estimates open-water loss from temperature, humidity, wind, and area; the other reports how close the air is to saturation from temperature and dew point.Evaporation Rate vs Water DemandCompare two sides of household water: how fast an open pool, pond, or tank loses water to the air, and how much water a household actually uses — and when to reach for each.Frost Date vs Plant Light CalculatorCompare the gardening frost date and plant light calculators: one plans when to start seeds and plant outdoors, the other measures whether seedlings get enough daily light.Plant Light Requirements vs Daylight HoursCompare the plant light requirements and daylight hours calculators: daily light integral from measured PPFD and photoperiod versus daylight duration from latitude and date.Plant Light Requirements vs Plant GrowthCompare the plant light requirements and plant growth calculators: daily light integral from measured PPFD and photoperiod versus growing degree days accumulated from daily temperatures.Solar Panel Angle vs Daylight Hours CalculatorCompare displaying fixed or seasonal panel tilt angles for a scenario with computing daylight duration, solar sunrise, and sunset from latitude and date — and where sun geometry ends and energy estimates begin.Solar Panel Energy Scenario vs Carbon OffsetCompare solar panel energy scenarios with solar panel carbon offsets: one estimates annual production from sourced specific yield, the other estimates avoided grid emissions from system size and regional grid intensity.Solar Panel Energy Scenario vs Solar Panel AngleCompare the solar panel energy scenario calculator's area-and-yield annual energy estimates with the solar panel angle calculator's fixed and seasonal tilt scenario display.Solar Panels vs Grid Electricity CalculatorCompare the solar panel energy scenario calculator with the electricity cost calculator: estimating what rooftop solar could produce and what grid power costs.UV Exposure vs Plant Light CalculatorCompare UV exposure level — UV index, time outdoors, and skin type — with plant light requirements, which convert PPFD and photoperiod into daily light integral for growers.Wind Power vs Solar Panel EnergyCompare the wind power calculator's instantaneous theoretical turbine power from wind speed, rotor diameter, and efficiency with the solar panel calculator's annual photovoltaic energy scenarios from user-entered specific yield.

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