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35 calculators

HVAC & plumbing calculators

Heating and cooling loads, duct and pipe sizing, flow, pressure drop and water heating.

A–Z index of all calculators

#
A
C
D
H
P
R
V
W

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1 1/2 in pipe Bore area, water content, flow rate and friction loss for 1 1/2 in schedule 40 pipe. Outside diameter 48.3 mm, bore 40.9 mm, holding 1.314 litres per metre.
1 1/4 in pipe Bore area, water content, flow rate and friction loss for 1 1/4 in schedule 40 pipe. Outside diameter 42.2 mm, bore 35.1 mm, holding 0.968 litres per metre.
1 in pipe Bore area, water content, flow rate and friction loss for 1 in schedule 40 pipe. Outside diameter 33.4 mm, bore 26.6 mm, holding 0.556 litres per metre.
1/2 in pipe Bore area, water content, flow rate and friction loss for 1/2 in schedule 40 pipe. Outside diameter 21.3 mm, bore 15.8 mm, holding 0.196 litres per metre.
1/4 in pipe Bore area, water content, flow rate and friction loss for 1/4 in schedule 40 pipe. Outside diameter 13.7 mm, bore 9.2 mm, holding 0.066 litres per metre.
1/8 in pipe Bore area, water content, flow rate and friction loss for 1/8 in schedule 40 pipe. Outside diameter 10.3 mm, bore 6.8 mm, holding 0.036 litres per metre.
10 in pipe Bore area, water content, flow rate and friction loss for 10 in schedule 40 pipe. Outside diameter 273.1 mm, bore 254.5 mm, holding 50.870 litres per metre.
12 in pipe Bore area, water content, flow rate and friction loss for 12 in schedule 40 pipe. Outside diameter 323.9 mm, bore 303.2 mm, holding 72.202 litres per metre.
14 in pipe Bore area, water content, flow rate and friction loss for 14 in schedule 40 pipe. Outside diameter 355.6 mm, bore 333.4 mm, holding 87.301 litres per metre.
16 in pipe Bore area, water content, flow rate and friction loss for 16 in schedule 40 pipe. Outside diameter 406.4 mm, bore 381 mm, holding 114.009 litres per metre.
18 in pipe Bore area, water content, flow rate and friction loss for 18 in schedule 40 pipe. Outside diameter 457.2 mm, bore 428.7 mm, holding 144.343 litres per metre.
2 1/2 in pipe Bore area, water content, flow rate and friction loss for 2 1/2 in schedule 40 pipe. Outside diameter 73 mm, bore 62.7 mm, holding 3.088 litres per metre.
2 in pipe Bore area, water content, flow rate and friction loss for 2 in schedule 40 pipe. Outside diameter 60.3 mm, bore 52.5 mm, holding 2.165 litres per metre.
20 in pipe Bore area, water content, flow rate and friction loss for 20 in schedule 40 pipe. Outside diameter 508 mm, bore 477.8 mm, holding 179.301 litres per metre.
24 in pipe Bore area, water content, flow rate and friction loss for 24 in schedule 40 pipe. Outside diameter 609.6 mm, bore 574.7 mm, holding 259.401 litres per metre.
3 1/2 in pipe Bore area, water content, flow rate and friction loss for 3 1/2 in schedule 40 pipe. Outside diameter 101.6 mm, bore 90.1 mm, holding 6.376 litres per metre.
3 in pipe Bore area, water content, flow rate and friction loss for 3 in schedule 40 pipe. Outside diameter 88.9 mm, bore 77.9 mm, holding 4.766 litres per metre.
3/4 in pipe Bore area, water content, flow rate and friction loss for 3/4 in schedule 40 pipe. Outside diameter 26.7 mm, bore 20.9 mm, holding 0.343 litres per metre.
3/8 in pipe Bore area, water content, flow rate and friction loss for 3/8 in schedule 40 pipe. Outside diameter 17.1 mm, bore 12.5 mm, holding 0.123 litres per metre.
4 in pipe Bore area, water content, flow rate and friction loss for 4 in schedule 40 pipe. Outside diameter 114.3 mm, bore 102.3 mm, holding 8.219 litres per metre.
5 in pipe Bore area, water content, flow rate and friction loss for 5 in schedule 40 pipe. Outside diameter 141.3 mm, bore 128.2 mm, holding 12.908 litres per metre.
6 in pipe Bore area, water content, flow rate and friction loss for 6 in schedule 40 pipe. Outside diameter 168.3 mm, bore 154.1 mm, holding 18.651 litres per metre.
8 in pipe Bore area, water content, flow rate and friction loss for 8 in schedule 40 pipe. Outside diameter 219.1 mm, bore 202.7 mm, holding 32.270 litres per metre.

A

Air conditioner sizing Cooling load for a room from area, occupancy, glazing and equipment.

C

Condensate rate Water removed from air by cooling or dehumidification.

D

Duct sizing Duct diameter for an air flow at a target velocity, with the equivalent rectangular duct.

H

P

R

V

Ventilation rate Air change rate and fan size for a room, with the CO2 level it implies.

W

Water heating energy Energy, time and cost to heat a tank of water, and the standing loss.

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