Solar, Energy & Sustainability Calculators

80 free solar, energy & sustainability calculators in Other.

Air Conditioner Running CostEstimate what running a window or portable AC costs monthly.
Annual Electricity CostFree Annual Electricity Cost calculator with clear step-by-step results.
Battery Bank Amp Hour CalculatorConvert between amp-hours, kilowatt-hours and runtime for a battery bank.
Battery Bank Size CalculatorSize an off-grid battery bank in amp-hours for the autonomy required.
Battery Bank Voltage CalculatorChoose a battery bank voltage and work out the series and parallel arrangement.
Battery Charge Time CalculatorEstimate how long a battery takes to charge from a solar array or charger.
Battery Cycle Life CalculatorProject battery cycle life and calendar life under a given duty cycle.
Battery Depth of Discharge CalculatorTrade depth of discharge against cycle life and usable energy.
Battery Discharge Time CalculatorCalculate how long a battery lasts at a given load, allowing for capacity derating.
Battery Energy CalculatorCalculate the energy stored in a battery and its usable portion.
Battery Power CalculatorCalculate the power a battery can deliver and the C-rate that implies.
Battery RuntimeFree Battery Runtime calculator with clear step-by-step results.
Battery State of Charge CalculatorEstimate battery state of charge from resting voltage.
Breaker SizeFree Breaker Size calculator with clear step-by-step results.
Building Energy IntensityFree Building Energy Intensity calculator with clear step-by-step results.
Carbon Footprint CalculatorEstimate an annual carbon footprint across energy, travel, food and consumption.
Carbon Offset CalculatorWork out the offsets needed to neutralise a given quantity of emissions.
Carbon Offset Cost CalculatorCompare the cost of offsetting emissions against reducing them at source.
Diesel Generator Cost CalculatorTotal the cost of running a diesel generator including fuel, servicing and capital.
Electric Vehicle Carbon Savings CalculatorCompare lifetime emissions of an electric vehicle against a petrol equivalent.
Energy Consumption CalculatorWork out total energy consumption and cost across a set of devices.
Energy Efficiency CalculatorCompare useful energy output against energy input to get efficiency and losses.
Energy Savings CalculatorQuantify the annual saving from an energy efficiency measure and its payback.
Energy Star Savings CalculatorCompare an efficient appliance against a standard model over its lifetime.
Energy Storage CostFree Energy Storage Cost calculator with clear step-by-step results.
Energy Usage Cost CalculatorCalculate what an appliance costs to run per day, month and year.
Generator FuelEstimate fuel burned and cost of running a generator daily.
Generator Fuel Consumption CalculatorEstimate generator fuel consumption and run time from tank capacity.
Generator Load CalculatorCheck generator loading and whether it sits in the healthy operating band.
Generator Size CalculatorSize a generator for a connected load including starting surge.
Grid Tie Solar CalculatorSize and evaluate a grid-connected solar system without storage.
Horsepower to WeightFree Horsepower to Weight calculator with clear step-by-step results.
Household Carbon Footprint CalculatorEstimate a household carbon footprint from energy use, travel and occupancy.
Hybrid Solar System CalculatorSize a hybrid solar system with battery and grid backup.
Inverter Efficiency CalculatorCompare inverter input and output power to find efficiency and losses.
Inverter Runtime CalculatorCalculate how long an inverter can run a load from a battery bank.
LED SavingsCompare old bulbs with LEDs and see yearly dollar savings.
Monthly Electricity CostFree Monthly Electricity Cost calculator with clear step-by-step results.
Mulch DepthWork out mulch bags and depth for garden beds.
Off Grid Solar CalculatorSize a complete off-grid solar system including array, battery and inverter.
Power to Weight RatioFree Power to Weight Ratio calculator with clear step-by-step results.
Renewable Energy Percentage CalculatorCalculate what share of total energy use comes from renewable sources.
Renewable Energy ROI CalculatorAssess the return on a renewable energy investment against its lifetime savings.
Room Cooling CostEstimate cooling cost from room size, watts per square foot and usage.
Solar Array Current CalculatorCalculate array string current and voltage for cable and controller sizing.
Solar Array Voltage CalculatorCheck string voltage across the temperature range against inverter limits.
Solar Azimuth CalculatorAssess the yield impact of panel orientation away from true south or north.
Solar Battery Backup CalculatorWork out how long a solar battery will run essential loads during an outage.
Solar Battery PaybackFree Solar Battery Payback calculator with clear step-by-step results.
Solar Battery Size CalculatorSize a solar battery in kilowatt-hours for the evening load you want to cover.
Solar Cable Size CalculatorSize DC solar cable for current capacity and acceptable voltage drop.
Solar Capacity Factor CalculatorCalculate the capacity factor of a solar installation and compare it with other sources.
Solar Charge Controller CalculatorSize an MPPT or PWM charge controller for a solar array and battery bank.
Solar Degradation CalculatorProject panel output decline over the system lifetime and against warranty terms.
Solar Energy Production CalculatorProject annual and lifetime solar generation including degradation.
Solar Export CalculatorCalculate exported solar energy and the revenue it earns.
Solar Generator Sizing CalculatorSize a portable solar generator or power station for a set of loads.
Solar Import CalculatorCalculate remaining grid imports after solar and the cost they carry.
Solar Inverter Size CalculatorSize a solar inverter for an array, including the DC to AC ratio.
Solar LCOE CalculatorCalculate the levelised cost of solar electricity over the system lifetime.
Solar Panel AreaFree Solar Panel Area calculator with clear step-by-step results.
Solar Panel CountFree Solar Panel Count calculator with clear step-by-step results.
Solar Panel Output CalculatorCalculate the real output of a panel after temperature, soiling and age derating.
Solar Panel Size CalculatorWork out how many panels of a given wattage are needed for a target output.
Solar Panel Spacing CalculatorCalculate the row spacing needed to avoid inter-row shading.
Solar Payback CalculatorCalculate how long a solar system takes to repay its cost through bill savings.
Solar Peak Sun Hours CalculatorConvert daily solar irradiation into equivalent peak sun hours.
Solar Performance Ratio CalculatorCalculate the performance ratio of a solar installation against its theoretical output.
Solar RadiationFree Solar Radiation calculator with clear step-by-step results.
Solar ROI CalculatorWork out the return on investment and payback period of a solar installation.
Solar Self Consumption CalculatorCalculate what share of solar generation is used on site rather than exported.
Solar System Size CalculatorSize a solar array in kilowatts from annual consumption, sun hours and system losses.
Solar Tilt Angle CalculatorFind the optimal panel tilt angle for a latitude and season.
TopsoilVolume and cost of topsoil for lawn and beds.
Tree Carbon Offset CalculatorCalculate how many trees are needed to absorb a given quantity of CO2.
UPS Backup Time CalculatorCalculate UPS runtime for a load from its installed battery capacity.
UPS Battery Size CalculatorSize UPS batteries for a required runtime at a given load.
UPS Load CalculatorSize a UPS for a connected load with headroom and power factor accounted for.
Wire FillFree Wire Fill calculator with clear step-by-step results.
Wire Voltage DropFree Wire Voltage Drop calculator with clear step-by-step results.