Top 10 Best Pump Sizing Software of 2026

AFT Fathom from Applied Flow Technology (aft.com) is a premier engineering software for steady-state analysis of incompressible piping and ducting systems, with advanced capabilities for pump sizing, selection, and performance optimization. It simulates complex hydraulic networks including pumps, valves, fittings, and control devices, using extensive manufacturer pump databases for precise curve matching and system balancing. Engineers use it to design efficient systems, predict pressures, flows, and pump requirements while minimizing energy costs and ensuring reliability.

FluidFlow by Wood PLC is a sophisticated pipe flow simulation software that models steady-state incompressible, compressible, slurry, and multiphase flows in complex piping networks. It supports pump sizing by generating accurate system curves, calculating required head and flow rates, and matching against extensive pump performance data. Widely used in oil & gas, chemicals, power, and water industries, it enables engineers to optimize pump selection and predict system behavior under varying conditions.

PIPE-FLO is a specialized engineering software for steady-state analysis of liquid piping systems, allowing users to model complex pipe networks, calculate flow rates, pressure losses, and accurately size pumps based on system requirements. It integrates pump performance curves, valve settings, and equipment data to optimize system design and operation. Widely used in industries like water/wastewater, chemical processing, and HVAC for reliable hydraulic simulations.

EPANET is a free, public-domain software package developed by the U.S. EPA for modeling the hydraulic and water quality behavior of pressurized pipe networks, such as water distribution systems. It supports the simulation of pumps using performance curves (head-flow relationships), allowing users to evaluate pump operations under steady-state or extended-period conditions with varying demands. While not a dedicated pump sizing tool, it enables iterative sizing by modeling network hydraulics and pump interactions.

OpenFlows WaterGEMS is a robust hydraulic modeling software from Bentley Systems for designing and analyzing water distribution, wastewater, and stormwater networks. It excels in simulating pump operations within full system models, allowing users to size pumps based on hydraulic demands, head curves, and efficiency using steady-state, extended-period, and transient analyses. The tool supports pump optimization, scenario comparisons, and integration with GIS and CAD for comprehensive infrastructure planning.

ESP-PLUS is a professional-grade software from ESP, Inc., specialized in hydraulic modeling, pump sizing, and optimization for water distribution, wastewater, and industrial pumping systems. It allows engineers to simulate steady-state and transient flows, generate accurate system curves, and select pumps from extensive manufacturer catalogs. The tool excels in energy audits, cost analysis, and system design optimization using advanced algorithms.

H2X is a cloud-based engineering design software focused on hydraulic calculations for building services, including automated pump sizing, selection, and system optimization for plumbing, heating, and cooling systems. It performs detailed pressure loss, flow balancing, and pump performance curve analysis while ensuring compliance with international standards. The tool integrates directly with Revit for BIM workflows, enabling efficient design iteration and collaboration.

Systemwize is a cloud-based hydronic system design platform that specializes in pump sizing, pipe sizing, and equipment selection for HVAC applications. It performs detailed hydraulic calculations to determine required pump head, flow rates, and selects pumps from an extensive manufacturer database. The software also integrates heat loss analysis, expansion tank sizing, and generates professional reports and BOMs for project documentation.

Grundfos Product Center is a web-based pump sizing and selection tool from Grundfos, enabling users to input hydraulic parameters like flow rate, head, NPSH, and efficiency requirements to identify optimal pumps from their catalog. It provides detailed performance curves, sizing calculations, energy optimization suggestions, and access to datasheets, CAD models, and manuals. The platform supports multi-stage sizing, system curve analysis, and pump replacement recommendations, tailored specifically for Grundfos products across applications like water supply, wastewater, and HVAC.

The Wilo Selection Assistant is a web-based pump sizing and selection tool from Wilo, accessible at pro.wilo.com, designed for HVAC, water supply, and wastewater professionals. Users input hydraulic data such as flow rate, head, efficiency requirements, and system conditions to receive precise pump recommendations from Wilo's extensive catalog. It provides performance curves, energy calculations, and project documentation features, with support for BIM integration and multi-language options.