MEASUR Calculators
May 29, 2026 · View on GitHub
Below is a categorized list of all available standalone calculators in MEASUR. Click the link to open the calculator in MEASUR. A code link is provided to it's implementation in the repository. Active work is being done to create algorithm documentation for each calculator in the MEASUR-Tools-Suite repository. This page will be updated as more documentation becomes available.
General Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Unit Converter | Perform quick unit conversion calculations. | Code | Coming Soon |
| Combined Heat and Power | Conduct a preliminary screening of the potential cost savings from CHP. | Code | Coming Soon |
| Cash Flow | Plot the savings and costs associated with an investment. | Code | Coming Soon |
| Power Factor Correction | Identify the capacitance (in kVAR) required for improving the power factor to the proposed level. | Code | Coming Soon |
| Power Factor Triangle | Calculate different parameters of the power factor triangle. | Code | Coming Soon |
| CO₂ Conversion | Estimate carbon dioxide (CO2) products for given electricity and fuel uses. | Code | Coming Soon |
| Electricity Reduction | Quantify the energy savings associated with reducing electricity usage. | Code | Docs |
| Natural Gas Reduction | Quantify the energy savings associated with reducing natural gas usage. | Code | Docs |
| Altitude Correction | Calculate barometric pressure from altitude. | Code | Coming Soon |
| Weather Bins | Perform a bin analysis on TMY data to determine the number of hours per year that meet specific weather conditions. | Code | Coming Soon |
Compressed Air Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Compressed Air Reduction | Quantify the energy savings associated with reducing compressed air usage. | Code | Docs |
| Compressed Air Pressure Reduction | Quantify the energy savings associated with reducing compressed air system pressure. | Code | Docs |
| Compressed Air - Leak Survey | Quantify the energy savings associated with reducing compressed air leaks. | Code | Docs |
| Actual to Standard Airflow | Converts acfm (Actual cubic feet per minute) to scfm (Standard cubic feet per minute) and vice versa for the given conditions using either ASME standard conditions or CAGI/ISO standard conditions. | Code | Coming Soon |
| Bleed Test | Estimate leak rate for the system. Also called a Dropdown test or a Pressure Decay test. | Code | Coming Soon |
| Leak Loss Estimator - Bag Method | Estimates the leakage losses in a compressed air system using the bag method. | Code | Docs |
| Pneumatic Air Requirement | Estimate the quantity of air required by a specific single acting or a double acting piston cylinder compressor. | Code | Docs |
| Receiver Tank Sizing | Calculate the required size of the receiver tank. | Code | Docs |
| Usable Air Capacity | Estimate the quantity of compressed air that is available for use. | Code | Coming Soon |
| Pipe Sizing | Determine pipe diameter when the volumetric flow velocity, pressure, and design velocity are known. | Code | Docs |
| Velocity in the Piping | Estimate the velocity of compressed air throughout system piping. | Code | Coming Soon |
| System Capacity | Determine total capacity of compressed air system or specific pipes and receiver tanks. | Code | Coming Soon |
| Operation Costs | Estimate the cost of operation of the compressor in both fully and partially loaded instances. | Code | Docs |
Fans Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Fan System Optimization Checklist | Checklist for optimizing fan systems. | Code | Coming Soon |
| Fan Traverse Analysis | Analyze fan traverse measurements. | Code | Coming Soon |
| Fan Curve | Develop a fan curve and explore the effects of changes in head, flow, speed, and impeller diameter. | Code | Coming Soon |
| Fan Achievable Efficiency | Estimate the achievable fan efficiency for various fan styles. | Code | Coming Soon |
Lighting Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Lighting Replacement | Calculate the energy savings associated with lighting opportunities. | Code | Coming Soon |
Motors Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| NEMA Energy Efficiency | Shows the predicted efficiency of an induction motor, based on size, rotating speed and efficiency class. | Code | Coming Soon |
| Motor Performance | Plots current, efficiency, power factor vs motor shaft load for a given motor description. | Code | Coming Soon |
| Percent Load Estimation | Calculate percent load via field measurements. | Code | Coming Soon |
| Motor Drive Comparison | Compares the annual energy cost of different motor drives. | Code | Coming Soon |
| Replace vs Rewind | Compares the cost and energy of rewinding a failed motor versus replacing it with a new energy-efficient model. | Code | Coming Soon |
| Full-Load Amps | Calculate the full-load amps of a motor. | Code | Coming Soon |
Process Cooling Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Chiller Staging | Analyze the impact of chiller staging on energy performance of chilled water systems. | Code | Coming Soon |
| Chiller Energy Performance and Temperature Reset | Analyze the impact of chiller operating parameters on energy performance. | Code | Coming Soon |
| Cooling Tower Basin Heater Energy | Analyze basin heater energy consumption. | Code | Coming Soon |
| Cooling Tower Fan Energy | Calculate cooling tower fan energy consumption. | Code | Coming Soon |
| Cooling Tower Makeup Water | Analyze cooling tower water consumption. | Code | Coming Soon |
| Psychrometric Calculator | Calculate the properties of moist air based on formulas published in ASHRAE Fundamental Handbook. | Code | Coming Soon |
Process Heating Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Pre-Assessment Screening | Compare the relative energy use of equipment to prioritize energy evaluations and opportunities. | Code | Coming Soon |
| Flue Gas Loss | Determine the amount of heat lost in the furnace flue gas. | Code | Docs |
| Charge Material | Estimate savings from preheating or changing how the load is heated. | Code | Docs |
| Fixture Loss | Estimate the heat loss from heating the fixtures. | Code | Docs |
| Wall Loss | Estimate the heat loss via the walls of the heating system. | Code | Docs |
| Cooling Loss | Estimate losses from a cooling a heating system. | Code | Docs |
| Atmosphere Loss | Estimate losses from heating makeup atmospheric gases. | Code | Docs |
| Opening Loss | Estimate losses due to openings in the heating system. | Code | Docs |
| Gas Leakage Loss | Estimate losses due to gases leaking out of or into the furnace. | Code | Docs |
| Waste Heat for Absorption Chillers | Calculate energy savings from using exhaust gas (waste) heat to provide energy for an absorption chiller in place of a compressor. | Code | Docs |
| Heat Cascading | Estimate energy and related cost savings when exhaust gases from a higher temperature (primary) process heating equipment is used to supply heat to lower temperature (secondary) process heating equipment. | Code | Docs |
| Air Heating using Flue Gas | Estimate maximum air flow that can be heated by using exhaust gas heat of flue gases from a furnace, oven, or boiler. | Code | Docs |
| O₂ Enrichment | Estimate fuel savings via adjusting the oxygen content of combustion and flue gases. | Code | Docs |
| Fuel to Electricity Equivalency | Estimate required heat input when switching heat source from fuel-fired to electric or vice versa. | Code | Docs |
| Orifice Meter Flow Calculator | Calculate the energy flow into the furnace by calculating the gas flow from data obtained by an orifice meter. | Code | Docs |
Pumps Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Pump Head Tool | Calculate pump head using inlet and out pressures, elevation, and pipe diameter. | Code | Coming Soon |
| Pump Curve | Develop a pump curve and explore the effects of changes in head, flow, pump speed, and impeller diameter. | Code | Coming Soon |
| Valve Energy Loss | Calculate energy loss across valves. | Code | Coming Soon |
| Pump Achievable Efficiency | Estimate the achievable pump efficiency for various pump styles based on ANSI/HI 13-2000. | Code | Coming Soon |
| Specific Speed | Calculate pump specific speed. | Code | Coming Soon |
Steam Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| Steam Properties | Calculate the properties of steam, via IAPWS R7-97. | Code | Coming Soon |
| Saturated Properties | Calculate the properties of saturated steam, via IAPWS R7-97. | Code | Coming Soon |
| Steam Reduction | Quantify the energy savings associated with reducing steam use. | Code | Docs |
| Stack Loss | Determine the amount of heat lost in the boiler stack gas. | Code | Coming Soon |
| Boiler | Determine the amount of fuel energy required to produce steam in boiler. | Code | Coming Soon |
| Steam Turbine | Calculate the energy generated or steam outlet conditions for a steam turbine. | Code | Coming Soon |
| Pipe Insulation | Quantify the energy savings associated with insulating hot pipes. | Code | Docs |
| Tank Insulation | Quantify the energy savings associated with insulating hot tanks. | Code | Docs |
| Boiler Blowdown Rate | Calculate the blowdown rate of a boiler. | Code | Coming Soon |
| Deaerator | Determine the required water and steam flows for a required feedwater mass flow. | Code | Coming Soon |
| Flash Tank | Determine the mass flows and properties of any resulting outlet gas and/or liquid for given inlet conditions. | Code | Coming Soon |
| PRV | Calculate the properties of steam after a pressure drop with optional desuperheating. | Code | Coming Soon |
| Header | Calculate the combined steam properties of multiple steam inlets. | Code | Coming Soon |
| Heat Loss | Calculate the energy (heat) loss and outlet steam properties given inlet steam conditions and a % heat loss. | Code | Coming Soon |
| Vent Steam to Heat Water | Estimate energy savings when vent stream is used to heat water using a steam to liquid heat exchanger. | Code | Coming Soon |
| Heat Recovery From Condensing Heat Exchanger | Estimate energy savings when stack waste heat is recovered using condensing heat exchanger to heat boiler feed water. | Code | Docs |
| Feedwater Economizer | Estimate energy savings when stack waste heat is recovered using non-condensing heat exchanger to heat boiler feed water. | Code | Docs |
Waste Water Calculators
| Calculator | Description | Code | Docs |
|---|---|---|---|
| O₂ Utilization Rate | Estimate Oxygen Utilization Rate (OUR) from DO values. | Code | Coming Soon |
| State Point Analysis Tool | Use a state point analysis to assess activated sludge design, operations, and troubleshoot systems. | Code | Coming Soon |
| Water/Wastewater Reduction | Quantify water and wastewater reduction opportunities. | Code | Docs |