Energy & Utilities
Generation, storage, extraction and grid — solar, wind, geothermal, biomass, hydrogen, batteries, oil and gas, and mining.
How much energy a system makes, stores or costs. Solar array sizing, tilt and shading, inverter ratios and payback; wind turbine power curves and capacity factor; geothermal loop length; biomass fuel value; and hydrogen production and storage.
Battery storage covers bank sizing, depth of discharge, round-trip efficiency and backup runtime.
Extraction and grid tools handle well economics and decline curves, refinery yields, mining recovery and stripping ratios, and transmission loss, load factor and demand charges.
110 calculators in 4 sections.
Matches are ranked by relevance. Use CtrlK anytime to search the full site.
Solar, Wind & Renewables
Array and turbine sizing, capacity factor, geothermal loops and biomass fuel.
Community Solar Calculator
Compare savings from community solar subscription vs rooftop solar.
Inverter Sizing Calculator
Determine the right inverter capacity for your solar array.
Net Metering Calculator
Calculate monthly credits and savings from solar excess production.
Solar Battery Sizing Calculator
Calculate battery storage capacity needed for solar backup.
Solar Degradation Calculator
Estimate solar panel output decline over a 25-year lifespan.
Solar Panel Angle Calculator
Find the optimal tilt angle for solar panels based on your latitude and season.
Solar Payback Period Calculator
Calculate how many years it takes to recoup your solar investment.
Solar Shading Analysis Calculator
Estimate production losses from shading on your solar array.
Solar String Calculator
Calculate panels per string from voltage limits and inverter specs.
Solar System Size Calculator
Calculate KW system size from electricity usage and sun hours.
Commercial Solar System Design Calculator
Array size from commercial electricity consumption.
Solar Carport Calculator
Carport dimensions and capacity from parking layout.
Community Solar Farm Calculator
Revenue from subscriber count and credit allocation.
Solar + Storage (Commercial) Calculator
Demand charge reduction from battery dispatch strategy.
Solar REC Revenue Calculator
Solar REC value from production.
ITC/PTC Calculator
Investment and production tax credit for solar projects.
MACRS Depreciation (Solar) Calculator
Accelerated depreciation schedule for solar assets.
Third-Party PPA Calculator
PPA rate comparison vs utility rate escalation.
Solar O&M Cost Calculator
Annual O&M cost from system size.
Agrivoltaics Calculator
Crop production under panels with dual-use analysis.
Capacity Factor Calculator
Calculate the ratio of actual energy output to maximum possible output.
Small Wind Feasibility Calculator
Evaluate ROI for a residential or small commercial wind turbine.
Tower Height Optimization Calculator
Calculate wind speed and power increase from a taller tower.
Wind Energy LCOE Calculator
Calculate the levelized cost of energy for a wind project.
Wind Farm Spacing Calculator
Calculate optimal turbine spacing to minimize wake losses.
Wind Resource Assessment Calculator
Assess wind energy potential using Weibull distribution parameters.
Wind Shear Calculator
Calculate wind speed at any height from two measurement points.
Wind-Solar Hybrid Calculator
Size a complementary wind and solar system for reliable power.
Wind Turbine Noise Calculator
Calculate sound pressure level at a given distance from wind turbines.
Wind Turbine Output Calculator
Calculate annual energy production from wind turbine specs and wind speed.
Anaerobic Digester Calculator
Size an anaerobic digester based on feedstock volume, retention time, and operating temperature.
Biochar Production Calculator
Estimate biochar yield and carbon sequestration from pyrolysis of wood, straw, or manure feedstocks.
Biodiesel Production Calculator
Estimate biodiesel and glycerin yields from vegetable or waste cooking oil via transesterification.
Biogas Production Calculator
Estimate methane yield, electricity generation, and CO2 offset from anaerobic digestion of organic feedstocks.
Biomass Boiler Calculator
Size a biomass boiler and estimate fuel consumption for wood, pellet, or chip systems.
Biomass Carbon Lifecycle Calculator
Analyze the carbon lifecycle of biomass fuels including combustion emissions, transport footprint, and biogenic carbon sequestration.
Ethanol Yield Calculator
Estimate ethanol production from corn, sugarcane, or cellulosic feedstocks with byproduct and energy balance outputs.
Waste-to-Energy Calculator
Evaluate waste-to-energy plant economics including tipping fee revenue, electricity sales, operating costs, and payback period.
Wood Chip Fuel Calculator
Calculate the volume and weight of wood chips needed for a given heating requirement.
Wood Pellet Production Calculator
Calculate pellet output from raw wood based on moisture content and conversion efficiency.
Enhanced Geothermal Output Calculator
Calculate power output from an enhanced geothermal system (EGS).
Geothermal COP Calculator
Calculate coefficient of performance from source and delivery temperatures.
Geothermal Gradient Calculator
Calculate temperature at depth from the geothermal gradient.
Geothermal Payback Calculator
Calculate payback period from utility savings vs conventional HVAC.
Geothermal Savings Calculator
Calculate annual savings compared to conventional HVAC.
Geothermal Well Design Calculator
Estimate well depth, casing, flow rate, and cost for a geothermal well.
Ground Loop Sizing Calculator
Calculate bore depth and loop length for a geothermal heat pump.
Ground Temperature Calculator
Estimate undisturbed ground temperature at any depth and time of year.
Heat Pump Desuperheater Calculator
Calculate hot water savings from a geothermal desuperheater.
Horizontal vs Vertical Loop Calculator
Compare cost and performance of horizontal and vertical ground loops.
Storage & Hydrogen
Battery bank sizing, runtime, round-trip efficiency and hydrogen production.
Battery C-Rate Calculator
Calculate charge and discharge time from battery C-rate.
Battery Capacity Calculator
Calculate amp-hours and watt-hours needed from load and runtime.
Battery Cycle Life Calculator
Estimate expected battery cycles from depth of discharge and chemistry.
Battery Pack Configuration Calculator
Calculate series/parallel cell arrangement for target voltage and capacity.
Battery Recycling Value Calculator
Estimate the recoverable material value from recycling a battery.
Battery State of Health Calculator
Calculate battery SOH from capacity fade.
Battery Thermal Management Calculator
Calculate cooling requirements for a battery pack.
Charge Time Calculator
Calculate hours to fully charge a battery from charger power and efficiency.
Grid-Scale Storage Calculator
Size and evaluate economics of utility-scale battery storage for peak shaving.
Lead-Acid vs Lithium Calculator
Compare total cost of ownership between lead-acid and lithium batteries.
Electrolyzer Sizing Calculator
Size a water electrolyzer for hydrogen production based on daily demand, efficiency, and operating hours. Estimates electricity cost and water consumption.
Hydrogen Storage Calculator
Calculate compressed hydrogen tank volume, weight, energy content, and storage densities for different tank types.
Fuel Cell Output Calculator
Calculate electrical and heat output from a hydrogen fuel cell system based on hydrogen flow rate, efficiency, and stack configuration.
Green Hydrogen Cost Calculator
Calculate the levelized cost of green hydrogen (LCOH) including electricity, CAPEX, OPEX, and water costs.
Hydrogen Pipeline Calculator
Calculate pipeline diameter, flow velocity, pressure drop, and compression power for hydrogen gas transport.
Fuel Cell Vehicle Range Calculator
Calculate driving range, fuel economy, and CO₂ savings for a hydrogen fuel cell vehicle based on tank capacity, efficiency, and driving conditions.
Hydrogen Safety Distance Calculator
Calculate exclusion zones, flammable cloud radius, thermal radiation distance, and overpressure distance for hydrogen leak scenarios.
Power-to-Gas Efficiency Calculator
Calculate the round-trip efficiency of power-to-gas-to-power systems including electrolysis, compression, storage, and fuel cell conversion.
Ammonia-to-Hydrogen Conversion Calculator
Calculate hydrogen yield from ammonia cracking, including conversion efficiency, energy content, and net energy balance.
Hydrogen Blending Calculator
Calculate the effects of blending hydrogen into natural gas pipelines including energy content changes, CO₂ reduction, and Wobbe Index impact.
Oil, Gas & Mining
Well economics and decline curves, refinery yields, ore grade and recovery.
Decline Curve Calculator
Forecast production decline using exponential or hyperbolic models.
Drilling Cost Calculator
Estimate per-foot and total drilling cost from rig rate and depth.
Gas Compression Calculator
Calculate compressor horsepower from pressure and flow requirements.
Hydraulic Fracturing Calculator
Estimate fluid volume and proppant for a hydraulic fracturing job.
Natural Gas BTU Calculator
Calculate energy content from gas composition.
Pipeline Flow Calculator
Calculate gas flow rate from pipe diameter and pressure differential.
Reservoir Volume Calculator
Estimate original oil or gas in place using volumetric method.
Tank Battery Calculator
Size storage tanks for oil and water production.
Well Economics Calculator
Calculate IRR, NPV, and payback period for an oil or gas well.
Well Spacing Calculator
Calculate optimal well spacing from drainage radius.
API Gravity Calculator
Convert specific gravity to API gravity for crude oil classification and pricing.
Corrosion Allowance Calculator
Calculate required pipe or vessel wall thickness including corrosion margin per ASME standards.
Crude Oil Blending Calculator
Calculate blend ratios to achieve target API gravity and sulfur specifications from two crude streams.
Flash Point Estimator
Estimate blend flash point from component fractions for NFPA/GHS safety classification.
Gas-Oil Ratio Calculator
Calculate GOR from production data and estimate solution gas ratio for reservoir characterization.
Lubricant Viscosity Calculator
Calculate operating viscosity from temperature using the Walther equation and classify by ISO VG grade.
Octane Blending Calculator
Calculate blended octane rating from up to three gasoline component volumes and octane numbers.
Pipeline Hydraulics Calculator
Calculate pressure drop, pump station count, and horsepower requirements for petroleum pipelines.
Refinery Yield Calculator
Estimate product slate percentages from crude type and refinery conversion unit configuration.
Tank Farm Capacity Calculator
Calculate total storage capacity from tank count, dimensions, roof type, and maximum fill level.
Blast Pattern Design Calculator
Calculate burden, spacing, hole depth, and powder factor for bench blasting operations.
Ground Support Design Calculator
Calculate rock bolt spacing, length, and shotcrete thickness from RMR and excavation dimensions.
Haulage Cost Calculator
Calculate per-ton haulage cost from distance, grade, truck specs, fuel, and labor rates.
Mill Recovery Calculator
Calculate metal recovery percentage from head grade, tailing grade, and throughput for processing plant evaluation.
Mine Ventilation Calculator
Calculate CFM requirements from mine volume, diesel equipment HP, personnel count, and altitude.
Mining Royalty Calculator
Calculate royalty payments from production, metal price, and royalty rate for gross revenue, NSR, or net profits royalties.
Ore Reserve Calculator
Estimate proven and probable reserves from drill data, cutoff grade, and metal price for mine planning.
Rock Mass Rating (RMR) Calculator
Calculate Bieniawski RMR classification from UCS, RQD, joint spacing, condition, and groundwater ratings.
Stripping Ratio Calculator
Calculate waste-to-ore ratio and break-even stripping ratio for open pit mine economics.
Tailing Dam Capacity Calculator
Calculate tailings storage volume and years of capacity from dam geometry and tailings density.
Grid & Transmission
Load factor, transmission loss, demand charges and generation dispatch.
Demand Response Savings Calculator
Calculate revenue and savings from demand response load curtailment.
Electricity Rate Analysis Calculator
Compare flat, TOU, and demand charge rate structures.
Grid Interconnection Cost Calculator
Estimate the cost of interconnecting a generation project to the grid.
Load Flow Calculator
Calculate power flow, losses, and voltage drop through transmission lines.
Peak Demand Forecasting Calculator
Forecast future peak demand with growth, EV load, and efficiency gains.
Power Purchase Agreement Calculator
Compare PPA rates with utility rates over the contract term.
Reliability Indices Calculator
Calculate SAIDI, SAIFI, and CAIDI from outage data.
System Frequency Response Calculator
Calculate frequency deviation and ROCOF from a generation imbalance.
Transformer Loading Calculator
Calculate percent loading, hot spot temperature, and remaining life.
Voltage Drop Distribution Calculator
Calculate voltage drop across a distribution feeder.