Pipe size, hydronic BTU/GPM, expansion tanks, trench backfill, roof and site drainage, trench drains, French drains, swales, sump pumps, culverts, rolling offsets, bend lengths, miter, saddle and reducer layouts, slope, heat loss and supports
Plumbing & Piping Trades Suite
Size water, drain and hydronic piping end to end: flow and pressure-drop screening, slopes, expansion tanks, water hammer, pipe supports and site drainage.
Entry intents pipe size calculator rolling offset calculator pipe pipe rolling offset formula 45 degree pipe bend developed length calculator minimum tangent pipe bend calculator pipe miter cut calculator degrees two piece pipe miter calculator pipe wrap around template calculator pipe saddle cut layout calculator lateral pipe branch cut calculator eccentric reducer offset calculator concentric reducer length chart pipe pipe reducer layout calculator btu per gpm delta-t calculator delta-t flow rate gpm calculator hydronic btu calculator expansion tank sizing calculator pipe trench backfill volume calculator gutter size calculator downspout sizing calculator catch basin sizing calculator trench drain sizing by flow rate french drain sizing calculator swale capacity calculator sump pump capacity calculator culvert size calculator by drainage area pipe slope calculator pipe support span calculator pipe pressure rating calculator pipe insulation heat loss calculator
Workflow map
Start at the stage that matches the job in front of you; each stage links directly to the calculators and lookup tools that support it.
- 1
Size the run
Pick pipe ID, schedule, capacity, hydronic BTU/GPM, pressure drop, volume and hydronic expansion acceptance before detailing.
- 2
Lay out the install
Check trench backfill takeoff, rolling offsets, bend developed length, miter and saddle templates, reducer offset layout, gutter/downspout runoff, catch-basin runoff, trench-drain grate/channel/outlet capacity, French-drain storage, swale capacity, sump pump capacity, culvert barrel capacity, drain slope, support spans, thermal movement and HDPE bend radius.
Pipe Trench Backfill Calculator Pipe Rolling Offset Calculator Pipe Bend Developed Length Calculator Pipe Miter Cut Calculator Pipe Saddle Cut Calculator Pipe Reducer Offset Calculator Gutter & Downspout Sizing Calculator Catch Basin Sizing Calculator Trench Drain Sizing Calculator French Drain Sizing Calculator Swale Capacity Calculator Sump Pump Capacity Calculator Culvert Capacity Calculator Pipe Slope Calculator Pipe Support Span Calculator Pipe Thermal Expansion Calculator HDPE Bend Radius Calculator - 3
Check operating risk
Screen pressure rating, heat loss, water hammer and dosing support data.
Tools in this workflow
Calculators come first, followed by lookup tools and reference pages when this workflow needs tabular data.
Calculator Pipe Size by Flow Velocity Required pipe inside diameter from flow and target velocity, with Darcy pressure drop and head loss at the solved ID. Calculator Pipe Flow Pressure Drop Water-pipe velocity, Reynolds number, Darcy pressure drop, head loss and power loss from flow, pipe ID, length and fittings. Calculator BTU/GPM Delta T Hydronic BTU/h or kW from liquid flow and Delta T, with required GPM, required Delta T, mass flow and a 500 x GPM x Delta F water-shortcut comparison. Calculator Pipe Volume Pipe liquid capacity, contained volume, fluid mass and fill or drain time from actual ID, length, run count, flow and density. Calculator Expansion Tank Sizing Hydronic expansion volume, required acceptance, minimum diaphragm tank volume, selected-tank utilization and maximum pressure check. Calculator Pipe Trench Backfill Pipe trench excavation, bedding, pipe displacement, native backfill, imported backfill and loose spoil haul-off takeoff. Calculator Pipe Slope Drain and pipe layout slope, fall, pitch, end invert elevation, inches per foot and 1:n ratio from run length or invert elevations. Calculator Pipe Rolling Offset Pipefitter rolling offset layout from rise, roll, fitting angle and takeout, with true offset, travel, cut length, advance and roll angle. Calculator Pipe Bend Developed Length Pipe bend centerline arc length and developed cut length from bend angle, radius, OD and tangents, with chord, setback and blank margin. Calculator Pipe Miter Cut Pipe miter cut angle, long-to-short difference and wrap-around template drops from OD, turn angle and miter piece count. Calculator Pipe Saddle Cut Centered branch-pipe saddle and lateral coping template from header OD, branch OD and branch angle, with 16-mark drops. Calculator Pipe Reducer Offset Concentric and eccentric pipe reducer offset, long/short side lengths, taper angles and shell-area estimate from actual ODs and reducer length. Calculator Gutter & Downspout Sizing Roof runoff, gutter run capacity, downspout capacity, required gutter depth and limiting roof area from rainfall and gutter geometry. Calculator Catch Basin Sizing Catch basin and yard-drain runoff, grate open area, inlet velocity, Manning outlet pipe capacity and limiting drainage area. Calculator Trench Drain Sizing Trench drain design flow, grate open area, rectangular channel capacity, outlet pipe capacity and required channel depth. Calculator French Drain Sizing French-drain runoff, gravel void storage, perforated pipe capacity, storage duration, required trench length and limiting drainage area. Calculator Swale Capacity Vegetated drainage swale runoff, trapezoidal channel capacity, velocity, required depth, freeboard and limiting drainage area. Calculator Sump Pump Capacity Sump pump inflow, required pump capacity at head, basin drawdown volume, pump run time, cycle rate and high-water reserve time. Calculator Culvert Capacity Culvert runoff, circular or box barrel Manning capacity, full-flow velocity, required size and limiting drainage area. Calculator Pipe Pressure Rating Barlow thin-wall pipe pressure rating, required wall thickness, hoop stress, utilization and wall margin from OD, wall, allowable stress and design pressure. Calculator Pipe Support Span Pipe hanger or support spacing screen from OD, wall thickness, material stiffness, fluid fill, uniform load, deflection and bending stress. Calculator Pipe Thermal Expansion Pipe thermal growth, movement allowance, center-anchor movement, fully restrained stress and anchor force from length, temperature, material, OD and wall. Calculator Pipe Insulation Heat Loss Insulated pipe heat loss, heat saved versus bare pipe, surface temperature rise, annual energy and cost from OD, insulation, k-value and temperature difference. Calculator HDPE Bend Radius HDPE and PE pipe minimum bend radius, required curve length, available deflection, chord length and offset from OD and radius multiplier. Calculator Water Hammer Pressure Pipe surge pressure, wave speed, critical closure time and pressure-rating margin from flow, pipe geometry, wall thickness and closure time. Calculator Chemical Feed Rate Water-treatment chemical feed rate, metering-pump setting, mL/min, gpd and day-tank runtime from flow, ppm dose, strength and specific gravity. Lookup tool Pipe Schedule Finder Find steel pipe OD, wall, bore, flow area and nominal weight from NPS and schedule 40 or 80. Reference Steel pipe schedule chart
Adjacent workflow suites
Browse all suites Fluid Power Size hydraulic and pneumatic actuators, pumps, receivers and hose runs, then screen drive motor amps, overloads and dosing rates for the same line. Woodworking Plan cabinetry and furniture work from takeoff to finish: board feet, cut lists, panel layouts, drawer sizing, joinery spacing, glue, finish coverage and dust airflow. Construction Move field dimensions into preliminary rafter, stair, deck joist and beam, slab and footing numbers, with ventilation, fastener and material takeoffs on the way.