Equipment Electricity Cost
Estimate electricity use from input power, equipment count and operating time. Apply your energy rate and a separately entered monthly charge.
Use equipment electricity cost →CALCULATORS BY INDUSTRY
Facilities & buildings calculators
Compare building energy, water losses, lighting and maintenance scenarios.
28 free tools. No signup. Methods, examples and source links on every page.
Drywall Sheet Quantity
Deduct openings, add your area allowance and estimate whole sheets for one layer of one board size.
Use drywall sheet quantity →Sealant Tube Quantity
Model a rectangular joint, add your loss allowance and round the purchase to whole tubes of the entered volume.
Use sealant tube quantity →Facility Electricity Intensity
Calculate annual electricity-only intensity and compare it with a reference you enter on the same floor-area basis.
Use facility electricity intensity →Lighting Retrofit Savings
Compare the same fixture count and annual hours at two entered input wattages, then add your maintenance saving assumption.
Use lighting retrofit savings →Savings Project Simple Payback
Separate annual gross savings from added operating cost and compare the net saving with upfront project cost.
Use savings project simple payback →Water Leak Cost
Turn a measured or assumed constant leak rate into volume, avoidable water and sewer charges, and a simple repair recovery ratio.
Use water leak cost →Commercial Electricity Bill
Model one billing period with two sequential energy tiers, an entered billable demand, one fixed charge and a stated tax rule.
Use commercial electricity bill →Time-of-Use Electricity Cost
Hold total kWh and tariff rates constant while changing the share assigned to peak and off-peak periods.
Use time-of-use electricity cost →Battery Runtime Scenario
Apply usable share and one-way conversion efficiency to nominal DC energy, then divide available AC energy by a constant AC load.
Use battery runtime scenario →Heat Pump vs Boiler Cost
Hold useful heat constant, apply an entered seasonal COP and boiler efficiency, then compare rounded energy and fixed operating costs.
Use heat pump vs boiler cost →Capital Project NPV, IRR & Payback
Compare three year-end project cash flows using NPV, year-end recovery checkpoints and an IRR only when the numerical method supports it.
Use capital project npv, irr & payback →Battery Arbitrage Scenario
Price one supplied charge/discharge cycle after round-trip loss and a user-stated degradation allowance, then extend it over counted cycles.
Use battery arbitrage scenario →Compressed-Air Heat-Recovery Value
Cap entered recoverable compressor heat by coincident usable demand and value only that modeled useful heat.
Use compressed-air heat-recovery value →Cooling Energy Cost
Convert entered useful cooling energy through a matching COP or EER convention to an electrical-energy cost.
Use cooling energy cost →Electricity Demand Charge
Compare billed peaks after a supplied ratchet floor over a chosen number of identical billing periods.
Use electricity demand charge →Entered Solar Resource Generation Scenario
Build a monthly capacity-times-resource scenario from your supplied peak-sun hours and loss factors, without a weather lookup.
Use entered solar resource generation scenario →Solar Self-Consumption Scenario
Calculate direct self-use, import and export inside three matching energy intervals before adding their totals.
Use solar self-consumption scenario →Commercial Water & Sewer Cost
Assemble two water tiers, a separately entered sewer billing quantity, fixed charges and a signed adjustment.
Use commercial water & sewer cost →Energy Equipment Life-Cycle Cost
Compare two finite annual cost schedules including one stated replacement and an end-horizon residual value.
Use energy equipment life-cycle cost →Solar Simple Payback
Calculate annual value from supplied self-use and export quantities, then compare positive net savings with net installed cost.
Use solar simple payback →Cooling Efficiency Unit Converter
Convert equivalent steady-state COP, EER and electrical kW per refrigeration ton on the same rating basis.
Use cooling efficiency unit converter →Drywall Finishing Material
Compound kilograms = net board area × entered kilograms per square metre × (1 + allowance / 100).
Use drywall finishing material →Suspended Ceiling Tile & Material
Estimate ceiling tiles, whole packs and material cost for a rectangular room. Add wall-angle and runner costs from your independently reviewed grid takeoff when needed.
Use suspended ceiling tile & material →Fan Affinity Law Scenario
Let r be new speed divided by positive reference speed.
Use fan affinity law scenario →Fan Air Power
Air power in kW = actual cubic metres per second × pressure rise in Pa ÷ 1,000.
Use fan air power →Measured Heat Pump COP
Coefficient of performance is useful heating or cooling output divided by electrical input on matching energy and time boundaries.
Use measured heat pump cop →Planar Thermal Conduction
Area-normalized resistance in m²·K/W is the sum of each layer’s thickness in metres divided by conductivity in W/(m·K).
Use planar thermal conduction →Before you use these calculations
Use measured floor area, operating hours and equipment counts.
Separate a fixed charge from charges that fall when consumption falls.
Match baseline and proposed service levels before claiming a saving.
Start with the example, replace the assumptions with your measurements, then change one input to see its effect. Save or export the scenario if you need to keep its basis.
How Case calculators are built and checked →Read practical calculation guides or browse another industry.